def draw(S, fignum, ax, color='r'):
graphes.set_fig(fignum)
print(S.fileCine)
if hasattr(S.param, 'im_ref'):
angle = S.param.angle * pi / 180
fx = S.param.fx
(Xpix, Zpix) = np.shape(S.param.im_ref)
if S.param.typeview == 'sv':
#vertical plane, the horizontal position is given py Xplane
x0 = S.param.Xplane
X = 0
Z = (Xpix * sin(angle) + Zpix * cos(angle)) * fx
zmin = -(S.param.x0 * sin(angle) + S.param.y0 * cos(angle)) * fx
# zmax = zmin+Z
z0 = zmin
else:
z0 = S.param.Zplane
Z = 0
X = max([Xpix, Zpix]) * fx
x0 = -S.param.x0 * fx
print([x0, z0, X, Z])
graphic_run(ax, x0, z0, X, Z, color=color)
#find the plane of measurement from Sdata file and
else:
print('No reference image given')
pass
def plot(p,tmin,tmax,label='',c=True,fignum=0):
"""
Plot the position of the vortex as a function time.
pos is a dictionnary obtained from track.position
tmin :
minimum index
tmax :
maximum index
"""
figs = {}
keys = ['Xmax','Xmin','Ymin','Ymax']
subplot = {'Xmax':121,'Xmin':121,'Ymax':122,'Ymin':122}
fig1 = graphes.set_fig(fignum+1)
fig1.set_size_inches(10,4)
accurate = {key:None for key in keys}
for key in keys:
# print(p[key][tmin:tmax])
if c:
p[key][tmin:tmax],accurate[key] = correct(p[key][tmin:tmax],a=5.)
else:
accurate[key]=True
if 'Y' in key:
#print('invert !')
if np.nanmean(p[key])<0:
p[key] = -np.asarray(p[key]) #X axis is inverted !
if accurate[key]:
graphes.set_fig(fignum+1,subplot[key])
graphes.graph(p['t'],p[key],fignum=fignum+1,label=label)
figs.update(graphes.legende('Time (s)',key[0]+' position (mm)',''))
if 'Y' in key:
graphes.set_axis(0.05,p['t'][tmax],0,100)
else:
graphes.set_axis(0.05,p['t'][tmax],-50,50)
p['d']=np.sqrt((np.asarray(p['Xmin'])-np.asarray(p['Xmax']))**2+(np.asarray(p['Ymin'])-np.asarray(p['Ymax']))**2)
graphes.graph(p['t'],p['d'][tmin:tmax],fignum=fignum+2,label=label)
graphes.set_axis(0,p['t'][tmax],0,50)
figs.update(graphes.legende('Time (s)','Distance (mm)',''))
if accurate['Xmin'] and accurate['Ymin']:
graphes.graph(p['Ymin'][tmin:tmax],p['Xmin'][tmin:tmax],fignum=fignum+3,label=label)
figs.update(graphes.legende('X position (mm)','Y position (mm)',''))
graphes.set_axis(0,60,-50,50)
if accurate['Xmax'] and accurate['Ymax']:
graphes.graph(p['Ymax'][tmin:tmax],p['Xmax'][tmin:tmax],fignum=fignum+3,label=label)
graphes.graph(p['t'],p['Gammamax'],fignum=fignum+4,label=label)
figs.update(graphes.legende('Time (s)','Circulation (mm^2/s)',''))
graphes.set_axis(p['t'][tmin],p['t'][tmax],0,5*10**4)
return figs,accurate
def compute_Ct(M,
tlist=[],
axes=['Ux', 'Ux'],
p=1,
display=False,
label='ko',
fignum=1):
display_part = False
if tlist == []:
t0 = 20
Dt = 50
dimensions = M.shape()
tlist = range(t0, dimensions[2] - t0, Dt)
tau = np.zeros(len(tlist))
tf = np.zeros(len(tlist))
for i, t in enumerate(tlist):
X, Y, Yerr = stat_corr_t(M, t, axes=axes, p=1, display=False)
try:
popt, pcurv = scipy.optimize.curve_fit(fitting.exp, np.abs(X), Y)
except ValueError:
print("NaN values encountered, fit skipped")
X, Y, Yerr = stat_corr_t(M, t, axe='E', p=1, display=True)
# input()
pcurv = []
popt = [1]
except RuntimeError:
print(
"Fitting did not converge, arbitrarly chosen to previous value"
)
pcurv = []
if i == 0:
popt = [1]
else:
popt = [tau[i - 1]]
tf[i] = M.t[t]
tau[i] = -1 / popt[0]
# print(str(M.t[t]) + ' : ' +str(tau[i]))
if display_part:
texp = np.abs(X)
graphes.set_fig(1)
graphes.errorbar(texp, Y, texp * 0, Yerr, fignum=0, label='ko')
graphes.graph(texp, exp(texp, -1 / tau[i]), fignum=1, label='r')
graphes.legende('$t/u^{2m}$', '$C_t$', '$m=1/2$')
if display:
graphes.graphloglog(tf, tau, fignum=fignum, label=label)
graphes.legende('t (s)', 't_c', graphes.title(M))
return tf, tau
def frames(fignum, Stroke=300, W=260., H=550., box=False):
"""
generates the frame of the experiment (grid + box)
drawing of the box is in option
INPUT
-----
fignum : int
number of figure to draw on
Stroke : float
Distance in mm between the start and the stop positions of the moving grid.
Its value is stored in Sdata.param.Stroke
W : float. default value 260.
Width of the box in mm. Default value correponds to the acrylic box used in 2015
H : float. default value 550.
Height of the box in mm. Default value correponds to the acrylic box used in 2015
OUTPUT
-----
ax : plt.axes object
axe corresponding to the drawing.
"""
# ax = axes.Axes(fig,frame)
graphes.set_fig(fignum)
ax = plt.gca()
#draw the box : vertical position of the box is set manually
zmin = -380
if box:
rect = patch.Rectangle((-W / 2, zmin),
W,
H,
facecolor='w',
edgecolor='k',
linewidth=3)
ax.add_patch(rect)
#draw the grid
Z_start = 0
Z_end = Z_start - Stroke
draw_grid(ax, 0, Z_start)
draw_grid(ax, 0, Z_end, facecolor='b')
ax.set_aspect('equal')
#set the axis limits
e = 50
graphes.set_axes(-e - W / 2, W / 2 + e, -e + zmin, H + zmin + e)
graphes.refresh()
return ax
def graphic(Slist):
"""
Represent graphically the various experimental runs by their angle of view
each graph correspond to a experimental configuration. They are distinguable by the used stroke
(still looking for other criterions)
INPUT
-----
Slist : Sdata list
List of Sdata (Sdata is a rich header associated to each cine file after processing)
OUTPUT
-----
figs : dict
keys corresponds to fig number, associated values to a default figure name based on x and y legends.
Autogenerated from output of stephane.display.graphes.legende
"""
#find all the different experimental configurations (now only given by the total stroke S)
axes = []
figures = []
strokes = []
c = 0
for S in Slist:
if not S.param.stroke in strokes:
stroke = S.param.stroke
strokes.append(stroke)
c += 1
figures.append(c)
axes.append(frames(c, Stroke=int(stroke), box=(stroke != 100.)))
print(strokes)
# graphic_run(ax)
for S in Slist:
if S.fileCine.find('Polymer') > 0:
color = 'b'
else:
color = 'r'
stroke = S.param.stroke
i = strokes.index(stroke)
draw(S, figures[i], axes[i], color=color)
figs = {}
for i, fig in enumerate(figures):
graphes.set_fig(fig)
figs.update(
graphes.legende(
'Pictural representation, S = ' + str(strokes[i]) + ' mm', '',
''))
return figs
def make_movie(M,Range=None,field=['E','vorticity'],Dirbase=None,Dt=1):
if Dirbase==None:
Dirbase = '/Users/stephane/Documents/Experiences_local/Accelerated_grid/PIV_data' #local saving
nx,ny,nt = M.shape()
axes = panel(M)
if Range is not None:
start,stop,step = tuple(Range)
else:
start,stop,step = tuple([0,nt,1])
frames = range(start,stop,step)
# field = ['Ux','Uy']
# field = ['E','vorticity']
figs={}
Dirname = Dirbase+'/'+M.Id.get_id()+'/'+graphes.remove_special_chars(str(field))+'/'
print(Dirname)
for i,f in enumerate(field):
if not hasattr(M,f):
M,field_n[i] = vgradient.compute(M,field[i],Dt=Dt)
field = field_n
# M,field[1] = vgradient.compute(M,field[1],Dt=Dt)
if Dt>1:
print('Smoothed data')
Dirname = Dirname + 'Smooth_Dt_'+str(int(Dt))+'/'
for i in frames:
graphes.set_fig(1)
for axe in axes:
plt.sca(axe)
plt.cla()
axes = panel(M,fignum=1)
plt.sca(axes[1])
print(i)
graphes.Mplot(M,field[0],i,fignum=1,log=True)
plt.text(-10,80,field[0],fontsize=20)
plt.sca(axes[2])
graphes.Mplot(M,field[1],i,fignum=1,log=True)
plt.text(-10,80,field[1],fontsize=20)
figs.update(graphes.legende('','','Front view',cplot=True))
graphes.save_figs(figs,savedir=Dirname,suffix='_'+str(i),dpi=100,frmt='png',display=False)
return axes
def draw_fieldofview(S,ax,fignum=None,color='r',view='side'):
"""
Draw the field view of the camera, currently side view only.
"""
if fignum is not None:
graphes.set_fig(fignum)
# print(S.fileCine)
u0,L=field_of_view(S)
if view=='side':
graphic_run(ax,u0[1],u0[2],L[1],L[2],color=color)
if view=='front':
graphic_run(ax,u0[0],u0[2],L[1],L[2],color=color)
graphic_run(ax,u0[0]+L[0],u0[2],L[1],L[2],color=color)
graphic_run(ax,u0[0],u0[2],L[0],L[1],color=color)
graphic_run(ax,u0[0],u0[2]+L[2],L[0],L[1],color=color)
if view=='bottom':
pass
def make(subplot,fignum=1,axis='off'):
"""
From a dictionnary of subplot location, generate a panel
"""
axes = {}
fig = graphes.set_fig(fignum)
for num in subplot:
axes[num] = plot_axes(fig,num,axis=axis)
return fig,axes
def example(M,Range=None,field=['E','vorticity']):
nx,ny,nt = M.shape()
axes = panel(M)
if Range is not None:
start,stop,step = tuple(Range)
else:
start,stop,step = tuple([0,nt,1])
frames = range(start,stop,step)
# field = ['Ux','Uy']
# field = ['E','vorticity']
figs={}
Dirbase = '/Users/stephane/Documents/Experiences_local/Accelerated_grid/PIV_data' #local saving
Dirname = Dirbase+'/'+M.Id.get_id()+'/'+graphes.remove_special_chars(str(field))+'/'
print(Dirname)
M,field[0] = vgradient.compute(M,field[0])
M,field[1] = vgradient.compute(M,field[1])
for i in frames:
graphes.set_fig(1)
for axe in axes:
plt.sca(axe)
plt.cla()
axes = panel(M,fignum=1)
plt.sca(axes[1])
graphes.Mplot(M,field[0],i,log=True)
plt.text(-10,20,field[0],fontsize=20)
plt.sca(axes[2])
graphes.Mplot(M,field[1],i,fignum=1,log=True)
plt.text(-10,20,field[1],fontsize=20)
figs.update(graphes.legende('','','Front view',cplot=True))
graphes.save_figs(figs,savedir=Dirname,suffix='_'+str(i),dpi=100,frmt='png')
return axes
def make_plot(M,Range=None,color='k',field=['E','vorticity'],Dirbase=None,Dt=1,example=False,total=True,fignum=1,save=True):
if Dirbase==None:
Dirbase = '/Users/stephane/Documents/Experiences_local/Accelerated_grid/PIV_data/Test6/' #local saving
Dirbase = './Stat_avg/Panel/'+M.Id.date
axes = flex_panel(M,fignum=fignum)
# for axe in axes:
# plt.sca(axe)
#plt.cla()
frames = select_range(M,Range)
# field = ['Ux','Uy']
# field = ['E','vorticity']
figs={}
if hasattr(M,'id'):
Dirname = Dirbase+'/'+M.Id.get_id()+'/'+graphes.remove_special_chars(str(field))+'/'
else:
Dirname = Dirbase+'/JHTD_Data/'+graphes.remove_special_chars(str(field))+'/'
print(Dirname)
if Dt>1:
print('Smoothed data')
Dirname = Dirname + 'Smooth_Dt_'+str(int(Dt))+'/'
#Dt = 50
t_moy,E_moy = access.avg_vs_t(M,'E',frames,Dt=Dt)
t_moy,Omega_moy = access.avg_vs_t(M,'omega',frames,Dt=Dt)
t_moy,Strain_moy = access.avg_vs_t(M,'strain',frames,Dt=Dt)
t_moy,Y_pdf_moy = access.avg_vs_t(M,field[1],frames,Dt=Dt)
epsilon = scale.dissipation_rate(Omega_moy) #dissipation rate
eta = scale.K_scale(epsilon) #dissipative scale
micro_1 = np.sqrt(1./4*E_moy/Strain_moy**2)
micro_2 = np.sqrt(E_moy/(Omega_moy)**2)
Re = scale.Re(micro_1,eta)
Re_lambda_1 = scale.Re_lambda(E_moy,micro_1)
Re_lambda_2 = scale.Re_lambda(E_moy,micro_2)
L = scale.I_scale(Re,E_moy)
# plt.sca(axes[2])
# graphes.graphloglog(t_moy,E_moy,fignum=1,label=color+'o-')
#Fourier.add_theory(t_moy,E_moy,[-2.],fignum=1)
# graphes.graphloglog(t_moy,Y_pdf_moy,fignum=1,label=color+'s-')
# graphes.graphloglog(t_moy,epsilon,fignum=1,label='gv-')
#Fourier.add_theory(t_moy,epsilon,[-3.],fignum=1)
# figs.update(graphes.legende('t (s)','E (mm^2/s^2), epsilon(mm^2/s^-3)',''))
plt.sca(axes[1])
graphes.graphloglog(t_moy,eta,fignum=fignum,label=color+'o-')
graphes.graphloglog(t_moy,micro_1,fignum=fignum,label=color+'s-')
graphes.graphloglog(t_moy,micro_2,fignum=fignum,label='cp-')
graphes.graphloglog(t_moy,L,fignum=fignum,label='gv-')
figs.update(graphes.legende('t (s)','eta (mm), lambda (mm)',''))
plt.sca(axes[2])
graphes.graphloglog(t_moy,Re,fignum=fignum,label=color+'o-')
graphes.graphloglog(t_moy,Re_lambda_1,fignum=fignum,label=color+'s-')
graphes.graphloglog(t_moy,Re_lambda_2,fignum=fignum,label='cp-')
figs.update(graphes.legende('t (s)','Re , Re_lambda',''))
# print(t_moy)
# print(Y_moy)
# print(t)
# print(Y_moy)
indices = [0,1]
# indices = [1,4]
cla_axes = [axes[i] for i in indices]
if save:
graphes.save_figs(figs,savedir=Dirname,prefix='General',suffix='_vs_t',dpi=300,frmt='png',display=True)
individual=False
if example:
frames_disp =[1200]
else:
step =frames[1]-frames[0]
frames_disp = range(frames[0]+step*10,frames[-1],step*10)
if individual:
for frame in frames_disp:
#print(frame)
#print(frames)
i = frames.index(frame)
graphes.set_fig(1)
for axe in cla_axes:
plt.sca(axe)
plt.cla()
axes = flex_panel(M,fignum=1)
if total:
plt.sca(axes[0])
graphes.Mplot(M,field[0],frame,fignum=1,log=True)
plt.text(-10,80,field[0],fontsize=20)
plt.sca(axes[1])
# graphes.graphloglog(t_moy,eta,fignum=1,label='ko-')
# graphes.graphloglog(t_moy,micro,fignum=1,label='ks-')
graphes.graph([t_moy[i]],[eta[i]],fignum=1,label='ro')
graphes.graph([t_moy[i]],[micro_1[i]],fignum=1,label='rs')
graphes.graph([t_moy[i]],[micro_2[i]],fignum=1,label='rp')
graphes.graphloglog([t_moy[i]],[L[i]],fignum=1,label='rv-')
plt.sca(axes[2])
graphes.graphloglog([t_moy[i]],[Re[i]],fignum=1,label='ro-')
graphes.graphloglog([t_moy[i]],[Re_lambda_1[i]],fignum=1,label='rs-')
graphes.graphloglog([t_moy[i]],[Re_lambda_2[i]],fignum=1,label='rp-')
plt.sca(axes[3])
figs.update(graphes.pdf(M,'Ux',frame,Dt=Dt,fignum=1,label='m^'))
figs.update(graphes.pdf(M,'Uy',frame,Dt=Dt,fignum=1,label='b>'))
figs.update(graphes.legende('t (s)','Re , Re_lambda',''))
plt.sca(axes[4])
figs.update(graphes.pdf(M,field[1],frame,Dt=Dt,fignum=1,label=color+'-'))
# graphes.Mplot(M,field[1],i,fignum=1,log=True)
# plt.text(-10,80,'PDF '+field[1],fontsize=20)
# figs.update(graphes.legende('','','Front view',cplot=True))
graphes.save_figs(figs,savedir=Dirname,suffix='_'+str(frame),dpi=100,frmt='png',display=False)
return axes
def spreading(Mlist, logscale=False):
labels = ['k^', 'ro', 'bs']
M = Mlist[0]
nx, ny, nt = M.shape()
#for i,M in enumerate(Mlist):
# vertical_spreading(M,10,Dt=20,label=labels[i])
print(M.shape())
frame = range(10, 350, 10)
Dt = np.asarray(
[M.t[frame[i]] - M.t[frame[i - 1]] for i in range(1, len(frame))])
# print(Dt)
# Ux_adv = np.zeros(nx)
# Uy_adv = np.zeros(ny)
D = 5 * 10**2
z_init, U_init = initial_shape(offset=140)
t_init = 0.026
for i, t0 in enumerate(frame[:-1]):
z, Ux_moy, Uy_moy, Ux_rms, Uy_rms = profile_average(Mlist,
t0,
Dt=10,
display=False)
print(M.t[t0])
z_dif, U_dif = solve_diffusion(-z_init, U_init, D, M.t[t0] - t_init)
# print(U_dif)
if i == 0:
fx = interp.splrep(z, Ux_rms, s=2) # kind='cubic')
fy = interp.splrep(z, Uy_rms,
s=2) # interp1d(z, Ux_rms, kind='cubic')
Ux_adv = interp.splev(z, fx)
Uy_adv = interp.splev(z, fy)
figs = display_profile(Mlist[0],
i,
t0,
z,
Ux_moy,
Uy_moy,
Ux_rms,
Uy_rms,
Dt=Dt[i],
fig=i,
logscale=logscale)
# Ux_adv,Uy_adv = advection(Dt[i],i,z,Ux_moy,Uy_moy,Ux_adv,Uy_adv,display=True)
graphes.semilogx(U_dif, z_dif, fignum=i, label='r-')
graphes.set_axis(10**0, 10**4, -300, -120)
graphes.save_figs(figs,
savedir='./Spreading/Diffusion_noNoise/',
suffix='',
prefix='2015_12_28_front_' + str(t0),
frmt='png')
figs = {}
graphes.set_fig(1)
figs.update(graphes.legende('$t$ (s)', '$Front position z$ (mm)', ''))
graphes.set_fig(2)
figs.update(graphes.legende('$t$ (s)', '$Front position z (log)$ (mm)',
''))
graphes.set_fig(3)
figs.update(graphes.legende('$t$ (s)', '$U_{rms}$ (mm/s)', ''))
graphes.save_figs(figs,
savedir='./Spreading/',
suffix='',
prefix='2015_12_28_all_')
def display_fft_vs_t(m,
dimension='1d',
Dt=20,
fignum=0,
label='^',
display=False):
display_part = True
# plt.close(1)
if dimension == '1d':
S_k_2d, kx, ky = energy_spectrum_2d(m, Dt=Dt)
S_k, k = energy_spectrum_1d(m, Dt=Dt)
if dimension == '2d':
S_k, kx, ky = energy_spectrum_2d(m, Dt=Dt)
# start=580
# end=700
# step=10
#print(S_k)
if dimension == '1d':
x = [10**0, 10**1.5]
y = [10**-0.5, 10**-3]
# graphes.graph(x,y,-1,'r-')
# t0=590
# time_serie=range(t0+10,10000,50)#[round(t0*i**2) for i in np.arange(1,4,0.3)]
#origin of time
t0 = 0. #.51
tref = np.asarray(m.t) - t0
# tref=1-tref
nt = len(tref)
# time_serie=[600,900,1200,1600,1900,2900,5000,8000]
# time_serie=[i for i in np.arange(400,650,10)]
# time_serie=range(10,nt-2)
step = 1
time_serie = range(Dt + 1, nt - Dt * 3 - 11,
step) #[50,120,200,300,400,450,550]
# print(nt-Dt*3-11)
# t0=500
# time_serie=[round(i)+t0 for i in np.logspace(1,3.973) if round(i)+t0<nt]
# time_serie=range(start,end,50)
alpha = np.zeros(len(time_serie))
beta = np.zeros(len(time_serie))
epsilon = np.zeros(len(time_serie))
t_alpha = np.zeros(len(time_serie))
# graphes.hist(k)
kmin = -2.7
kmax = -1.7
#print(np.log10(k))
tmax = 300
for i, t in enumerate(time_serie):
# print(t)
if tref[t] < tmax:
if dimension == '1d':
k_log = np.log10(k)
S_log = np.log10(S_k[:, t])
indices = np.logical_and(k_log > kmin, k_log < kmax)
# print(indices)
# print(S_log)
k_log = k_log[indices]
S_log = S_log[indices]
P = np.polyfit(k_log, S_log, 1)
alpha[i] = 10**P[1] #*np.mean(k)**P[0]
beta[i] = P[0]
C_k = 0.55
epsilon[i] = (alpha[i] / C_k)**(3 / 2)
t_alpha[i] = tref[t]
#if t>min(time_serie):
# Dt=tref[time_serie.index(t)]-tref[time_serie.index(t-1)]
# print(Dt,alpha[time_serie.index(t)])
# print((t_alpha,alpha))
if display_part:
graphes.set_fig(1)
# graphes.subplot(1,2,1)
k0 = np.min(k)
display_fft_1d(k, (k / k0)**(5 / 3) * S_k[:, t] / alpha[i],
fignum=1,
label='')
display_fft_1d(k, (k / k0) * S_k[:, t] / alpha[i],
fignum=2,
label='')
#normalized
# print(t_alpha[i])
# display_fft_1d(k,np.abs(S_k[:,t]/t_alpha[i]),fignum=1)
# graphes.graphloglog(k[indices],10**np.polyval(P,k_log),label='r--')
display_fft(m, t, dimension)
#graphes.subplot(1,2,2)
# graphes.vfield_plot(m,t,fignum=2)
#there is a slighlty degeneracy of the spectrum along both axis. Removes |kx| < epsilon and |ky| < epsilon for every k ?
# display_fft_2d(kx,ky,S_k_2d[:,:,t],fignum=3)
# display_fft(m,t,dimension)
# input()
if dimension == '2d':
display_fft_2d(kx, ky, S_k[:, :, t])
display_fft(m, t, dimension)
if display:
# title='$Z$ = '+str(m.Sdata.param.Zplane/10)+' cm'
# graphes.legende('$t$ (s)','$E (a.u.)$',title
graphes.graphloglog(t_alpha, alpha, label=label, fignum=7)
graphes.graphloglog([10**-1, 10**3], [10**8, 10**0],
label='r--',
fignum=7)
graphes.legende('$t$ (s)', '$E_{\lambda}$ (a.u.)',
graphes.set_title(m))
graphes.semilogx(t_alpha, beta, label=label, fignum=8)
# graphes.semilogx(t_alpha,beta,label=label,fignum=0)
graphes.semilogx([10**-1, 10**3], [-5 / 3, -5 / 3],
label='r-',
fignum=8)
graphes.set_axis(10**-1, 10**3, -2.5, 0)
graphes.legende('$t$ (s)', 'exponent', graphes.set_title(m))
#plot the dissipative scale as a function of time
nu = 1 #in mm^2/s
eta = (nu**3 / np.asarray(epsilon))**(1 / 4)
graphes.graphloglog(t_alpha, eta, label=label, fignum=9)
graphes.graphloglog([10**-1, 10**3], [10**8, 10**0],
label='r--',
fignum=9)
graphes.legende('$t$ (s)', '$\eta$ (mm)', graphes.set_title(m))
E_t = epsilon
t = t_alpha
return t, E_t
def make_2dmovie(M,
name,
Range=None,
fignum=1,
local=True,
log=False,
vmin=0,
vmax=1,
filt=False):
"""
Movie of the colormap of the velocity modulus U over time
INPUT
-----
M : Mdata class instance, or any other object that contains the following fields :
methods : shape()
attributes : Ux, Uy
Sdata object
Ids object
...
name : name of the field to be plotted. example : Ux,Uy, vorticity, strain
Range : np array
fignum : int. default value is 1
Dirname : string
Directory to save the figures
log : bool. default value is True
OUTPUT
-----
None
"""
if Range is not None:
start, stop, step = tuple(Range)
else:
start, stop, step = tuple([0, M.shape()[-1], 5])
# U=np.sqrt(S.Ux**2+S.Uy**2)
#by default, pictures are save here :
if local:
Dirlocal = '/Users/stephane/Documents/Experiences_local/Accelerated_grid'
else:
Dirlocal = os.path.dirname(M.Sdata.fileCine)
Dirname = name
if filt:
Dirname = Dirname + '_filtered'
Dir = Dirlocal + '/PIV_data/' + M.Id.get_id() + '/' + Dirname + '/'
print(Dir)
fig = graphes.set_fig(fignum)
graphes.set_fig(0) #clear current figure
print('Compute ' + name)
M, field = vgradient.compute(M, name, filter=filt)
for i in range(start, stop, step):
#Z = energy(M,i)
graphes.Mplot(M,
field,
i,
fignum=fignum,
vmin=vmin,
vmax=vmax,
log=log,
auto_axis=True)
# graphes.color_plot(Xp,Yp,-Z,fignum=fignum,vmax=700,vmin=0)
if i == start:
cbar = graphes.colorbar(
) #fignum=fignum,label=name+'(mm^2 s^{-2})')
else:
print('update')
# cbar.update_normal(fig)
filename = Dir + 'V' + str(i)
graphes.save_fig(fignum, filename, frmt='png')
def plot(x, y, U, fignum=1, vectorScale=10**8):
"""
Plot a 2d velocity fields with color coded vectors
Requires fields for the object M : Ux and Uy
INPUT
-----
M : Mdata set of measure
frame : number of the frame to be analyzed
fignum (opt) : asking for where the figure should be plotted
OUTPUT
------
None
"""
Ux = U[:, 0]
Uy = U[:, 1]
colorCodeVectors = False
refVector = 1.
# vectorScale = 100
vectorColormap = 'jet'
#bounds
#chose bounds from the histograme of E values ?
scalarMinValue = 0
scalarMaxValue = 100
# make the right figure active
graphes.set_fig(fignum)
# get axis handle
ax = plt.gca()
ax.set_yticks([])
ax.set_xticks([])
E = np.sqrt(Ux**2 + Uy**2)
Emoy = np.nanmean(E)
if colorCodeVectors:
Q = ax.quiver(x,y,Ux/Emoy,Uy/Emoy, E, \
scale=vectorScale/refVector,
scale_units='width',
cmap=plt.get_cmap(vectorColormap),
clim=(scalarMinValue, scalarMaxValue),
edgecolors=('none'),
zorder=4)
#elif settings.vectorColorValidation:
# v = 1
# #ax.quiver(x[v==0], y[v==0], ux[v==0], uy[v==0], \
# scale=vectorScale/refVector, scale_units='width', color=[0, 1, 0],zorder=4)
# Q = ax.quiver(x[v==1], y[v==1], ux[v==1], uy[v==1], \
# scale=vectorScale/refVector, scale_units='width', color='red',zorder=4)
else:
Q = ax.quiver(x,
y,
Ux / E,
Uy / E,
scale=vectorScale / refVector,
scale_units='width',
zorder=4) #, color=settings.vectorColor
graphes.legende('$x$ (mm)', '$y$ (mm)', '')
# add reference vector
#if settings.showReferenceVector:
# plt.quiverkey(Q, 0.05, 1.05, refVector, str(refVector) + ' m/s', color=settings.vectorColor)
#overwrite existing colorplot
graphes.refresh(False)
def profile_1d(M, Dt=10, direction='v', start=20, fignum=1):
"""
Compute the 1d averaged profile> Averaging is performed along a Dt window in time, and along the specified axis, either 'v' or 'h'
INPUT
-----
M : Mdata object.
Dt : int. Default 10
time windows width for the averaging
direction : string. default 'v'. Only option now
start : int
starting index
fignum : int
number for the figure output
OUTPUT
-----
Ux,Uy,Ux_std,Uy_std
"""
dimensions = M.shape()
if M.param.typeplane == 'vp':
if M.param.angle == 0.:
z = M.y[:, 0]
axis = [1, 0]
if M.param.angle == 90.:
z = M.x[0, :]
axis = [0, 1]
else:
z = M.y[:, 0]
axis = [1, 0]
for i in range(start, dimensions[2], Dt):
#averaging over Dt in time, and along one dimension in space
Ux = np.nanmean(np.nanmean(M.Ux[..., i:i + Dt], axis=2), axis=axis[0])
Uy = np.nanmean(np.nanmean(M.Uy[..., i:i + Dt], axis=2), axis=axis[0])
#standard deviation computation
# print(dimensions[axis[1]])
# print(tuple(axis+[Dt]))
orientation = tuple([axis[0] + 1, axis[1] + 1] + [0])
Ux_mean = np.asarray(
np.transpose([[
dict2list.to_1d_list(Ux) for k in range(dimensions[axis[0]])
] for t in range(Dt)], orientation))
Uy_mean = np.asarray(
np.transpose([[
dict2list.to_1d_list(Uy) for k in range(dimensions[axis[0]])
] for t in range(Dt)], orientation))
# Uy_mean = np.asarray([[dict2list.to_1d_list(Uy) for k in range(dimensions[axis[0]])] for t in range(Dt)],tuple(axis+[Dt]))
std_Ux = np.sqrt(
np.mean(np.mean(np.abs(M.Ux[..., i:i + Dt] - Ux_mean)**2, axis=2),
axis=axis[0]))
std_Uy = np.sqrt(
np.mean(np.mean(np.abs(M.Uy[..., i:i + Dt] - Uy_mean)**2, axis=2),
axis=axis[0]))
graphes.set_fig(0) #clear current axis
graphes.graph(z, Ux, label='k^', fignum=fignum) #,std_Ux)
graphes.graph(z, Uy, label='ro', fignum=fignum) #,std_Ux)
graphes.set_axis(-400, -100, -100, 100)
fig = graphes.legende('z (mm)', 'V_{rms} (mm/s)', 'Ux, Uy')
filename = './Results/Mean_profile_' + M.id.get_id(
) + '/' + fig[fignum] + '_t_' + str(i)
# print(filename)
graphes.save_fig(fignum, filename, frmt='png')
# graphes.graph(z,Uy,std_Uy)
# graphes.legende('z (m)','V (m/s)','Uy')
# raw_input()
return Ux, Uy, std_Ux, std_Uy
def vertical_spreading(M, N, Dt=10, label='k^'):
"""
Compute the vertical profile of RMS velocity as a function of time
INPUT
-----
OUTPUT
-----
figs : dict
key correspond to figure index, value to their standarzied filename
"""
n = 160
ti = 50
figs = {}
z0 = -M.param.stroke #!!!
z_1 = np.zeros(n)
z_2 = np.zeros(n)
t = np.zeros(n)
E = np.zeros(n)
indices = [(i + 1) * N + ti for i in range(n)]
for i, t0 in enumerate(indices):
z_1[i], z_2[i], E[i], std_E = velocity_profile(M,
i,
t0,
Dt=Dt,
display=True)
t[i] = M.t[t0]
#average on horizontal line (if rotated, correspond to vertical line)
#compute the vertical RMS velocity profile
fig = 1
graphes.set_fig(fig)
graphes.graph(t, z_1 - z0, fignum=fig, label=label)
graphes.graph(t, z_2 - z0, fignum=fig, label=label)
figs.update(graphes.legende('$t$ (s)', '$Front position z$ (mm)', ''))
fig = 2
graphes.set_fig(fig)
graphes.graphloglog(t, np.abs(z0 - z_1), fignum=fig, label=label)
graphes.graphloglog(t, np.abs(z0 - z_2), fignum=fig, label=label)
graphes.graphloglog(t, np.power(t, 0.5) * 10**2, fignum=fig, label='r--')
figs.update(graphes.legende('$t$ (s)', '$Front position z (log)$ (mm)',
''))
fig = 3
graphes.set_fig(fig)
graphes.graphloglog(t, E, fignum=fig, label=label)
figs.update(graphes.legende('$t$ (s)', '$U_{rms}$ (mm/s)', ''))
t_min = 6 * 10**-2
t_max = 4 * 10**-1
indices = np.where(np.logical_and(t < t_max, t > t_min))
t_part = t[indices]
z_part = np.abs(z0 - z_1[indices])
P = np.polyfit(np.log(t_part / t_min), np.log(z_part), 1)
C = np.exp(P[1])
nu = C**2 / t_min
print(P[0], C)
print('Effective diffusion coefficient : ' + str(nu) + ' mm^2/s')
graphes.graphloglog(t, C * np.power(t / t_min, P[0]), fignum=2, label='r-')
figs.update(graphes.legende('$t$ (s)', '$Front position z (log)$ (mm)',
''))
graphes.save_figs(figs,
savedir='./Spreading/',
suffix='',
prefix='2015_12_28_front_both_C')
return figs
def dispersion(Data,j,savedir):
tmin = 20
tmax = 160
accurate = Data['accurate'][j]
pos = Data['pos'][j]
Mlist= Data['M'][j]
A = Data['A'][j]
figs = {}
graphes
for c,key in enumerate(accurate[0].keys()):
Y = []
for i,M in enumerate(Mlist):
if accurate[i][key]:
#c+=1
Y.append(pos[i][key][tmin:tmax])
else:
print("not accurate")
Y = np.asarray(Y)
# print(key)
t = np.asarray(pos[i]['t'][tmin:tmax])
graphes.set_fig(1)
#graphes.errorbar(t,np.nanmean(Y,axis=0),0*t,np.nanstd(Y,axis=0),label='k',fignum=c+4)
# graphes.graph(t,np.nanstd(Y,axis=0),fignum=1,label=label)
# graphes.set_axis(0.05,0.45,0,15)
# figs.update(graphes.legende('Time (s)',key,''))
# graphes.graph(t**3,np.nanstd(Y,axis=0)**2,fignum=2,label=label)
# graphes.graph(t**3,1000*t**3,fignum=2,label='r-')
# graphes.set_axis(0.05**3,0.05,0,70)
# figs.update(graphes.legende('t^3',key+'^2',''))
print(A)
if A==0:
label='c'
else:
label='k-'
if 'X' in key:
graphes.graphloglog(t,np.nanstd(Y,axis=0),fignum=3,label=label)
graphes.graphloglog(t,30*t**1.5,fignum=3,label='r--')
# graphes.graphloglog(t,8*t**0.5,fignum=3,label='r--')
graphes.set_axis(0.05,0.6,0.01,50)
figs.update(graphes.legende('t',key+'',''))
if 'Y' in key:
# label='b-'
graphes.graphloglog(t,np.nanstd(Y,axis=0),fignum=4,label=label)
graphes.graphloglog(t,30*t**1.5,fignum=4,label='r--')
# graphes.graphloglog(t,8*t**0.5,fignum=4,label='r--')
graphes.set_axis(0.05,0.6,0.01,50)
figs.update(graphes.legende('t',key+'',''))
# graphes.graphloglog(t**3,1000*t**3,fignum=2,label='r-')
#figs.update(graphes.legende('t',key+'',''))
#print(c)
return figs
def display_profile(M,
i,
t0,
z,
Ux_moy,
Uy_moy,
Ux_rms,
Uy_rms,
Dt=1,
fig=1,
logscale=True):
t = M.t[t0]
U_noise_low, U_noise_high = check.bounds(M, t0)
graphes.set_fig(fig)
title = 't=' + str(int(t * 1000)) + ' ms' + 'Urms_zprofile'
Dir = M.fileDir + 'Velocity_distribution_log_M_2015_12_28_Meanfield' + '/'
z, Ux_th = fit_profile(M, t0, z, Ux_rms, p=9, log=True)
z, Uy_th = fit_profile(M, t0, z, Uy_rms, p=9, log=True)
# Ux_adv,Uy_adv = advection(Dt,z,Ux_moy,Uy_moy,Ux_rms,Uy_rms)
# print(Ux_adv/Ux_rms)
# print(Ux_adv)
figs = {}
if logscale:
# graphes.semilogx(Ux_rms,z,fignum=0,label='bo--')
graphes.semilogx(Uy_rms, z, fignum=i, label='k^--')
graphes.semilogx([U_noise_low, U_noise_low], [-400, -100],
fignum=i,
label='r--')
graphes.semilogx([U_noise_high, U_noise_high], [-400, -100],
fignum=i,
label='r--')
# graphes.semilogx(np.sqrt(np.power(Ux_moy,2)),z,fignum=i,label='b+--')
# graphes.semilogx(np.sqrt(np.power(Uy_moy,2)),z,fignum=i,label='c ^--')
graphes.set_axis(10**0, 10**4, -300, -120)
figs.update(graphes.legende('$U_{rms} (t/t_0)$', '$z$ (m)', ''))
file = graphes.set_title(M, title)
filename = Dir + file
else:
graphes.graph(Ux_rms, z, fignum=0, label='bo--')
graphes.graph(Uy_rms, z, fignum=i, label='k^--')
# graphes.semilogx(Ux_th,z,fignum=i,label='r-')
# graphes.semilogx(Uy_th,z,fignum=i,label='r-')
graphes.graph([U_noise_low, U_noise_low], [-400, -100],
fignum=i,
label='r--')
graphes.graph([U_noise_high, U_noise_high], [-400, -100],
fignum=i,
label='r--')
graphes.graph(np.sqrt(np.power(Ux_moy, 2)), z, fignum=i, label='b+--')
graphes.graph(np.sqrt(np.power(Uy_moy, 2)), z, fignum=i, label='c ^--')
graphes.set_axis(0, 2.5 * 10**3, -300, -120)
figs.update(graphes.legende('$U_{rms} (t/t_0)$', '$z$ (m)', ''))
file = graphes.set_title(M, title)
filename = Dir + file
graphes.save_figs(figs,
savedir='./Spreading/Stat_average_lin/',
suffix='',
prefix='2015_12_28_front_' + str(t0),
frmt='png')
return figs
def spatial_correlation(M,
compute=True,
rootdir='Corr_functions',
label='k^',
fignum=1,
display=True,
save=False):
"""
Compute the spatial correlation function
or display the correlation length as a function of time
save the correlations function in txt files
INPUT
-----
M : Mdata object
compute : bool
default value : True
if True, the correlations functions are computed, and save in txt files
if False, load the previously computed correlations functions and display the correlation length as a function of timme
rootdir : string
subdirectory name for saving the corr functions. Base directory correspond to the location of the associated dataset.
OUTPUT
-----
None
"""
if compute:
# chose randomly the pair of indices that will be used for computing the spatial correlation function
dlist = range(int(max(M.shape()) / 2))
indices = {}
N = 10**3
for i, d in enumerate(dlist):
indices[i] = d_2pts_rand(M.Ux[:, :, 0], d, N)
print('Pair of indices computed')
(ny, nx, nt) = M.shape()
# tref,d,Cxx,Cyy,Cxy,CEE = correlation_functions(M,dlist,indices,Dt=Dt)
# print('Correlation functions computed')
step = 100
Dt = 20
tref, d, Cxx, Cyy, Cxy, CEE = display_corr_vs_t(M,
dlist,
indices,
step=step,
Dt=Dt,
label='-',
display=True)
#How to save matrices in a single txt file ?
# filename = os.path.dirname(M.filename) + '/Corr_functions/' + name + '.txt'
axes = ['xx', 'yy', 'xy', 'CEE']
keys = ['d', 't'] + ['Corr_' + p for p in axes]
Corr_functions = [Cxx, Cyy, Cxy, CEE]
List_info = [d, tref] + Corr_functions
if save:
name = 'Corr_spatial_' + M.Id.get_id()
filename = os.path.dirname(
M.filename) + '/Corr_functions/' + name + '.txt'
print(filename)
rw_data.write_matrix(filename, keys, List_info)
# for C in [Cxx,Cyy,Cxy,CEE]:
# rw_data.write_matrix(tref,D,C)
print('Correlation functions saved in ' + filename)
else:
#try first to load the data rfrom the Corr_functions directory
Dir = os.path.dirname(M.filename) + '/' + rootdir
filename = Dir + '/Corr_spatial_' + M.Id.get_id(
) + '.txt' #print(filename)
Header, Data, axes = rw_data.read_matrix(filename,
Hdelimiter='\t',
Ddelimiter='\t')
print(Data.keys())
nd = axes['d']
nt = axes['t']
print((nd, nt))
Dt = 20
for key in Data.keys():
Data[key] = np.reshape(np.asarray(Data[key]), (nd, nt))
# Data[key]=cdata.smooth(Data[key],Dt)
dimensions = M.shape()
tlist = range(Dt, dimensions[2] - 3 * Dt, 1)
lc = np.zeros(len(tlist))
tf = np.zeros(len(tlist))
display_part = True
for i, t in enumerate(tlist):
d = Data['d'][:, i]
key = 'Corr_xx'
Cd = Data[key][:, i] / Data[key][0, i]
popt = fitting.fit(fitting.exp, d[0:10], Cd[0:10])
tf[i] = M.t[t]
lc[i] = -1 / popt[0]
# print(str(M.t[t]) + ' : ' +str(lc[i]))
if display_part:
if i % 100 == 0:
graphes.set_fig(1)
graphes.graph(d, Cd, fignum=0, label='ko')
graphes.graph(d, exp(d, -1 / lc[i]), label='r')
# graphes.graph(d,parabola(d,-1/lc[i])+1,label='r')
graphes.legende('$d (mm)$', '$C_d$', '')
graphes.set_axes(0, 3, -1, 1.1)
#input()
cdata.rm_nans([lc], d=2)
if display:
graphes.graphloglog(tf, lc, fignum=fignum, label=label)
graphes.legende('$t (s)$', '$d (mm)$', graphes.title(M))
