def diff(array, data, vectors):
"""This is a function used to optimise the U matrix. It evaluates the
difference between the rotated set of vectors and their corosponding
vectors in reciprical space.
"""
x = array[0]
y = array[1]
z = array[2]
angle = array[3]
axis = Vector([x, y, z])
U = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(axis, angle))
data = rotate_list(U, data)
index_list=[]
for i, dat in enumerate(data):
diffs = []
dat = dat
for j, vector in enumerate(vectors):
diffs.append((dat-vector).length())
index = diffs.index(min(dnp.abs(diffs)))
index_list.append(index)
targets = [0]*len(data)
for i, idx in enumerate(index_list):
targets[i] = vectors[idx]
total = 0
for i, dat in enumerate(data):
total += dnp.abs((dat - targets[i]).length())
return total
def baseline(self,xdataset, ydataset, smoothness): '''find the baseline y value for a peak in y dataset''' ymaxindex=ydataset.argMax() if smoothness > 1: wnd = dnp.ones(smoothness, dtype=dnp.float64)/smoothness ydataset = dnp.convolve(ydataset, wnd, 'same') result=dnp.gradient(ydataset, xdataset) leftresult=result[:ymaxindex] rightresult=result[ymaxindex+1:] leftminderivativeindex=dnp.abs(leftresult).argmin() rightminderivativeindex=dnp.abs(rightresult).argmin() leftbasey=ydataset.getElementDoubleAbs(leftminderivativeindex) rightbasey=ydataset.getElementDoubleAbs(rightminderivativeindex+1+leftresult.shape[0]) basey=(leftbasey+rightbasey)/2 return basey
def baseline(self,xdataset, ydataset, smoothness):
'''find the baseline y value for a peak in y dataset'''
xdataset = dnp.asarray(xdataset)
ydataset = dnp.asarray(ydataset)
ymaxindex=ydataset.argmax()
#TODO
result=dnp.gradient(ydataset,xdataset)
#derivative(xdataset, ydataset, smoothness)
leftresult=result[:ymaxindex]
rightresult=result[ymaxindex+1:]
leftminderivativeindex=dnp.abs(leftresult).argmin()
rightminderivativeindex=dnp.abs(rightresult).argmin()
leftbasey=ydataset[leftminderivativeindex]
rightbasey=ydataset[rightminderivativeindex+1+leftresult.shape[0]]
basey=(leftbasey+rightbasey)/2
return basey
def diff(array, data, vectors):
"""This is a function used to optimise the U matrix. It evaluates
"""
x = array[0]
y = array[1]
z = array[2]
# z = 1.0
angle = array[3]
axis = Vector([x, y, z])
U = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(axis, angle))
data = rotate_list(U, data)
index_list=[]
for i, dat in enumerate(data):
diffs = []
dat = dat
for j, vector in enumerate(vectors):
diffs.append((dat-vector).length())
index = diffs.index(min(dnp.abs(diffs)))
index_list.append(index)
targets = [0]*len(data)
for i, idx in enumerate(index_list):
targets[i] = vectors[idx]
total = 0
for i, dat in enumerate(data):
total += (dat - targets[i]).length()
return total*1000
def ideal_two_theta_gap(index, grouped_reflections, ideal_two_theta):
group = grouped_reflections[index]
two_theta = group[0][4]
if two_theta < ideal_two_theta[1] or two_theta > ideal_two_theta[2]:
return 0
else:
return dnp.abs(two_theta-ideal_two_theta[0])
def demoRealDataFitting():
m6Data=dnp.io.load("/dls/i06-1/data/2012/si7816-1/68917.dat", formats=['srs'], asdict=True);
# m6Data=dnp.io.load("/dls/i06-1/data/2012/si7816-1/68918.dat", formats=['srs'], asdict=True);
x, y=m6Data['m6qg'], m6Data['ca62sr'];
# [mu, sigma, peak, gf] = fineGaussianFitting(y, x, "Plot 2");
[mu, sigma, peak, gf] = fineGaussianFitting(y, x);
# One vertical line on the peak point:
# xx, yy=dnp.array([mu-1, mu+1]), dnp.array([0, peak]);
xx, yy=dnp.array([mu-1, mu, mu+1]), dnp.array([0, peak, 0]);
xxx, yyy=dnp.array([mu]), dnp.array([peak]);
# To find the closest data point to the peak;
cPos=(dnp.abs(x-mu)).minpos()[0];
cX, cY=x[cPos], y[cPos];
print("To plot the fitted data." )
x1=dnp.linspace(x[0], x[x.size-1], 500);
y1=myGaussianFunc(mu, sigma, peak, [x1]);
#Line plot does not work,
#dnp.plot.line(x, [y, y1] ) # plot line of evaluated function
#dnp.plot.updateline(xx, yy)
dnp.plot.points(x, y, None, 5);
sleep(1);
dnp.plot.addpoints(x1, y1, None, 1)
sleep(1);
dnp.plot.addpoints(xxx, yyy, None, 10);
return [mu, sigma, peak, gf];
def baseline(self, xdataset, ydataset, smoothness):
'''find the baseline y value for a peak in y dataset'''
ymaxindex = ydataset.argMax()
if smoothness > 1:
wnd = dnp.ones(smoothness, dtype=dnp.float64) / smoothness
ydataset = dnp.convolve(ydataset, wnd, 'same')
result = dnp.gradient(ydataset, xdataset)
leftresult = result[:ymaxindex]
rightresult = result[ymaxindex + 1:]
leftminderivativeindex = dnp.abs(leftresult).argmin()
rightminderivativeindex = dnp.abs(rightresult).argmin()
leftbasey = ydataset.getElementDoubleAbs(leftminderivativeindex)
rightbasey = ydataset.getElementDoubleAbs(rightminderivativeindex + 1 +
leftresult.shape[0])
basey = (leftbasey + rightbasey) / 2
return basey
def get_chi_steps(two_theta, starting_chi_value=100.0, final_chi_value=0.0):
theta = dnp.radians(two_theta / 2.0) # converts to radians and halfs to theta
radius = LENGTH * float(dnp.sin(theta))
delta_chi = float(dnp.rad2deg((WIDTH / radius)))
number_of_steps = dnp.abs(final_chi_value-starting_chi_value)/(delta_chi*0.5)
number_of_steps = int(number_of_steps)+1
return dnp.linspace(starting_chi_value, final_chi_value, number_of_steps)
def check_third_vector(targets, found_vectors, correct_length, r):
"""Checks the third vector is on the 'right' side of the other two
using the cross product of the other two.
"""
M = scm.matrix.sqr(found_vectors[0].elems +
found_vectors[1].elems + found_vectors[2].elems)
print 'M', M
if dnp.abs(M.determinant()) < 5*10 ** -3:
# Vectors are coplanar so cannot use cross product method but
# can use angles alone unless two of the vectors are anti
# parallel in which case there is a four fold rotational
# symmetry so the choice is arbitary.
dot0 = found_vectors[0].normalize().dot(
found_vectors[2].normalize())
dot1 = found_vectors[1].normalize().dot(
found_vectors[2].normalize())
angle0 = float(dnp.rad2deg(arccos(dot0)))
angle1 = float(dnp.rad2deg(arccos(dot1)))
for vector in correct_length:
if round(found_vectors[2].length(), r) == round(
vector.length(), r):
t_dot0 = targets[0].normalize().dot(vector.normalize())
t_angle0 = float(dnp.rad2deg(arccos(t_dot0)))
t_dot1 = targets[1].normalize().dot(vector.normalize())
t_angle1 = float(dnp.rad2deg(arccos(t_dot1)))
if angle0 - angle_accuracy < t_angle0 < angle0 + angle_accuracy and \
angle1 - angle_accuracy < t_angle1 < angle1 + angle_accuracy:
return targets
return [] # Reset targets as wrong combination was found
else:
target_plane_normal = (targets[0].cross(
targets[1])).normalize()
found_plane_normal = (found_vectors[0].cross(
found_vectors[1])).normalize()
found_dot = found_vectors[2].normalize().dot(
found_plane_normal)
# Find third target
dot0 = found_vectors[0].normalize().dot(
found_vectors[2].normalize())
dot1 = found_vectors[1].normalize().dot(
found_vectors[2].normalize())
angle0 = float(dnp.rad2deg(arccos(dot0)))
angle1 = float(dnp.rad2deg(arccos(dot1)))
for vector in correct_length:
if round(found_vectors[2].length(), r) == round(
vector.length(), r):
t_dot0 = targets[0].normalize().dot(vector.normalize())
t_angle0 = float(dnp.rad2deg(arccos(t_dot0)))
t_dot1 = targets[1].normalize().dot(vector.normalize())
t_angle1 = float(dnp.rad2deg(arccos(t_dot1)))
if angle0-angle_accuracy < t_angle0 < angle0 + angle_accuracy and \
angle1 - angle_accuracy < t_angle1 < angle1 + angle_accuracy:
target_dot = vector.normalize().dot(
target_plane_normal)
if target_dot < 0 and found_dot < 0 or\
target_dot > 0 and found_dot > 0:
targets.append(vector)
return targets
return [] # Reset targets as wrong combination was found
def two_theta_gap(index, grouped_reflections):
group = grouped_reflections[index]
current_2theta = group[0][4]
gaps =[]
try:
previous_group = grouped_reflections[index-1]
previous_2theta = previous_group[0][4]
gaps.append(dnp.abs(current_2theta-previous_2theta))
except IndexError:
pass
try:
next_group = grouped_reflections[index+1]
next_2theta = next_group[0][4]
gaps.append(dnp.abs(current_2theta-next_2theta))
except IndexError:
pass
return min(gaps)
def baseline(self, xdataset, ydataset, smoothness):
'''find the baseline y value for a peak in y dataset'''
xdataset = dnp.asarray(xdataset)
ydataset = dnp.asarray(ydataset)
ymaxindex = ydataset.argmax()
#TODO
result = dnp.gradient(ydataset, xdataset)
#derivative(xdataset, ydataset, smoothness)
leftresult = result[:ymaxindex]
rightresult = result[ymaxindex + 1:]
leftminderivativeindex = dnp.abs(leftresult).argmin()
rightminderivativeindex = dnp.abs(rightresult).argmin()
leftbasey = ydataset[leftminderivativeindex]
rightbasey = ydataset[rightminderivativeindex + 1 +
leftresult.shape[0]]
basey = (leftbasey + rightbasey) / 2
return basey
def moments(data): """ Returns (height, x, y, sigma_x, sigma_y) the gaussian parameters of a 2D distribution by calculating its moments """ total = data.sum() xyIndices = dnp.indices(data.shape) X=xyIndices[1]; Y=xyIndices[0]; x = (X*data).sum()/total y = (Y*data).sum()/total row = data[int(y), :] sigma_x = math.sqrt(dnp.abs((dnp.arange(row.size)-x)**2*row).sum()/row.sum()) col = data[:, int(x)] sigma_y = math.sqrt( dnp.abs((dnp.arange(col.size)-y)**2*col).sum()/col.sum() ) height = data.max() return [height, x, y, sigma_x, sigma_y];
def testPoly(self):
fr = fit.polyfit(self.x, self.y, 1)
print 'Poly: ', fr # print polynomial coeffs
self.checkitems([3.2, 0.35], fr, 1)
fr = fit.polyfit(self.x, self.z, 2)
print 'Poly: ', fr # print polynomial coeffs
self.checkitems([3.2, -12.2, 0.35], fr, 1)
v = fit.polyval(fr, [0,1])
print 'value is', dnp.abs(v-0.3)
self.checkitems([0.1, -9], v, 1)
def testSavingBits(self):
d = dnp.arange(12 * 32).reshape((12, 32))
b = dnp.abs(dnp.array(d, dnp.int8))
b[b < 0] = 0
print(b.min(), b.max())
self.save('uint.tiff', d, bits=32, signed=False)
self.save('ushort.tiff', d, bits=16, signed=False)
self.save('ubyte.tiff', b, bits=8, signed=False)
self.save('int.tiff', d, bits=32)
self.save('short.tiff', d, bits=16)
self.save('byte.tiff', dnp.array(d, dnp.int8), bits=8)
self.save('double.tiff', d, bits=33)
self.save('float.tiff', d, bits=33)
self.save('short.png', d, bits=16)
self.save('byte.png', b, bits=8)
def testSavingBits(self):
d = dnp.arange(12*32).reshape((12,32))
b = dnp.abs(dnp.array(d, dnp.int8))
b[b < 0] = 0
print b.min(), b.max()
dnp.io.save(OutTestFolder+'uint.tiff', d, bits=32, signed=False)
dnp.io.save(OutTestFolder+'ushort.tiff', d, bits=16, signed=False)
dnp.io.save(OutTestFolder+'ubyte.tiff', b, bits=8, signed=False)
dnp.io.save(OutTestFolder+'int.tiff', d, bits=32)
dnp.io.save(OutTestFolder+'short.tiff', d, bits=16)
dnp.io.save(OutTestFolder+'byte.tiff', dnp.array(d, dnp.int8), bits=8)
dnp.io.save(OutTestFolder+'double.tiff', d, bits=33)
dnp.io.save(OutTestFolder+'float.tiff', d, bits=33)
dnp.io.save(OutTestFolder+'short.png', d, bits=16)
dnp.io.save(OutTestFolder+'byte.png', b, bits=8)
def testSavingBits(self):
d = dnp.arange(12*32).reshape((12,32))
b = dnp.abs(dnp.array(d, dnp.int8))
b[b < 0] = 0
print b.min(), b.max()
dnp.io.save(OutTestFolder+'uint.tiff', d, bits=32, signed=False)
dnp.io.save(OutTestFolder+'ushort.tiff', d, bits=16, signed=False)
dnp.io.save(OutTestFolder+'ubyte.tiff', b, bits=8, signed=False)
dnp.io.save(OutTestFolder+'int.tiff', d, bits=32)
dnp.io.save(OutTestFolder+'short.tiff', d, bits=16)
dnp.io.save(OutTestFolder+'byte.tiff', dnp.array(d, dnp.int8), bits=8)
dnp.io.save(OutTestFolder+'double.tiff', d, bits=33)
dnp.io.save(OutTestFolder+'float.tiff', d, bits=33)
dnp.io.save(OutTestFolder+'short.png', d, bits=16)
dnp.io.save(OutTestFolder+'byte.png', b, bits=8)
def m6qgmax():
print("Move exit slit s6y to -6.5")
s6y.moveTo(-6.5)
q0 = m6qg.getPosition()
print("Current m6qg position: " + str(q0))
print("Scan m6qg ...")
m6Data = m6qgscan(q0)
# m6Data=GuassianScan();
x, y = m6Data['m6qg'], m6Data['ca62sr']
# x, y=m6Data['x'], m6Data['y'];
# [mu, sigma, peak, gf] = fineGaussianFitting(y, x, "Plot 1");
[mu, sigma, peak, gf] = fineGaussianFitting(y, x)
# One vertical line on the peak point:
# xx, yy=dnp.array([mu-1, mu+1]), dnp.array([0, peak]);
xx, yy = dnp.array([mu - 1, mu, mu + 1]), dnp.array([0, peak, 0])
xxx, yyy = dnp.array([mu]), dnp.array([peak])
# To find the closest data point to the peak;
cPos = (dnp.abs(x - mu)).minPos()[0]
cX, cY = x[cPos], y[cPos]
# data according to the model
x1 = dnp.linspace(x[0], x[x.size - 1], 500)
y1 = myGaussianFunc(mu, sigma, peak, [x1])
print("To plot the fitted data.")
dnp.plot.points(x, y, None, 5)
sleep(1)
dnp.plot.addpoints(x1, y1, None, 1)
sleep(1)
dnp.plot.addpoints(xxx, yyy, None, 10)
print("The peak position is: (%g, %g)" % (mu, peak))
ans = queryYesNo(
"Do you want to move m6qg to the estimated peak position?", "no")
if ans is 'yes':
m6qg.moveTo(mu)
print "m6qg:" + str(m6qg.getPosition())
return
def diff(U, data, vectors):
"""This is a function used to optimise the U matrix. It evaluates
"""
data = rm.rotate_list(U, data)
index_list=[]
for i, dat in enumerate(data):
diffs = []
dat = dat
for j, vector in enumerate(vectors):
diffs.append((dat-vector).length())
index = diffs.index(min(dnp.abs(diffs)))
index_list.append(index)
targets = [0]*len(data)
for i, idx in enumerate(index_list):
targets[i] = vectors[idx]
total = 0
for i, dat in enumerate(data):
total += (dat - targets[i]).length()
return total
def findBases(self, xdataset, ydataset, delta, smoothness): bases=[] peaks=self.findPeaksAndTroughs(ydataset, delta)[0] yslices=[] xslices=[] startindex=0 for index,value in peaks: #@UnusedVariable yslices.append(ydataset[startindex:index]) xslices.append(xdataset[startindex:index]) startindex=index+1 if smoothness > 1: wnd = dnp.ones(smoothness, dtype=dnp.float64)/smoothness for xset, yset in xslices, yslices: if smoothness > 1: yset = dnp.convolve(yset, wnd, 'same') result=dnp.gradient(yset, xset) minimumderivativeindex=dnp.abs(result).argmin() bases.append((xset[minimumderivativeindex],yset[minimumderivativeindex])) return bases
def findBases(self, xdataset, ydataset, delta, smoothness):
bases = []
peaks = self.findPeaksAndTroughs(ydataset, delta)[0]
yslices = []
xslices = []
startindex = 0
for index, value in peaks: #@UnusedVariable
yslices.append(ydataset[startindex:index])
xslices.append(xdataset[startindex:index])
startindex = index + 1
if smoothness > 1:
wnd = dnp.ones(smoothness, dtype=dnp.float64) / smoothness
for xset, yset in xslices, yslices:
if smoothness > 1:
yset = dnp.convolve(yset, wnd, 'same')
result = dnp.gradient(yset, xset)
minimumderivativeindex = dnp.abs(result).argmin()
bases.append(
(xset[minimumderivativeindex], yset[minimumderivativeindex]))
return bases
def findBasePoints(self, xdataset, ydataset, delta, smoothness):
xdataset = dnp.asarray(xdataset)
ydataset = dnp.asarray(ydataset)
peaks=self.findPeaksAndTroughs(ydataset, delta)[0]
#print peaks
yslices=[]
xslices=[]
startindex=0
for index,value in peaks: #@UnusedVariable
yslices.append(ydataset[startindex:index])
xslices.append(xdataset[startindex:index])
startindex=index+1
yslices.append(ydataset[startindex:])
xslices.append(xdataset[startindex:])
bases=[]
for xset, yset in zip(xslices, yslices):
result=dnp.gradient(yset, xset)
minimumderivativeindex=dnp.abs(result).argmin()
bases.append((xset[minimumderivativeindex],yset[minimumderivativeindex]))
#print "Base Points (position, value) : ", bases
return bases
def findBasePoints(self, xdataset, ydataset, delta, smoothness):
xdataset = dnp.asarray(xdataset)
ydataset = dnp.asarray(ydataset)
peaks = self.findPeaksAndTroughs(ydataset, delta)[0]
#print peaks
yslices = []
xslices = []
startindex = 0
for index, value in peaks: #@UnusedVariable
yslices.append(ydataset[startindex:index])
xslices.append(xdataset[startindex:index])
startindex = index + 1
yslices.append(ydataset[startindex:])
xslices.append(xdataset[startindex:])
bases = []
for xset, yset in zip(xslices, yslices):
result = dnp.gradient(yset, xset)
minimumderivativeindex = dnp.abs(result).argmin()
bases.append(
(xset[minimumderivativeindex], yset[minimumderivativeindex]))
#print "Base Points (position, value) : ", bases
return bases
def diff(array, data, vectors):
x = array[0]
y = array[1]
z = array[2]
angle = array[3]
axis = rm.Vector(x,y,z)
U = rm.Rotator(axis, angle)
data = rm.rotate_list(U, data)
index_list=[]
for i, dat in enumerate(data):
diffs = []
dat = dat
for j, vector in enumerate(vectors):
diffs.append((dat-vector).modulus())
index = diffs.index(min(dnp.abs(diffs)))
index_list.append(index)
targets = [0]*len(data)
for i, idx in enumerate(index_list):
targets[i] = vectors[idx]
total = 0
for i, dat in enumerate(data):
total += (dat - targets[i]).modulus()
return total
fr.parameters
fr[0]
fr.residual
d3x = data3['entry1']['default']['x'][...]
d3y = data3['entry1']['default']['y'][...]
ds = dnp.fft.fft(d3y)
dnp.plot.line(d3x,[ds.real,ds.imag])
dnp.plot.line(d3x,[dnp.fft.fftshift(ds.real),dnp.fft.fftshift(ds.imag)])
scan sg -1 1 0.001
data4 = dnp.io.load("<File name from the beginning of the scan>”)
d4y = data4['entry1']['default']['y'][...]
d4x = data4['entry1']['default']['x'][...]
ds = dnp.fft.fft(d4y)
dnp.plot.line(d4x,[d4y,dnp.fft.ifft(ds).real])
ds[500:1500] = 0
dnp.plot.line(d4x,[d4y,dnp.fft.ifft(ds).real])
ds[250:1750] = 0
dnp.plot.line(d4x,[d4y,dnp.fft.ifft(ds).real])
ds[50:1950] = 0
filter = dnp.arange(1,-1,(-2./2001.))
dnp.plot.line(d4x,filter)
filter = dnp.abs(filter)
dnp.plot.line(d4x,filter)
dnp.plot.line(d4x,[d4y,dnp.fft.ifft(ds*dnp.power(filter,1)).real])
dnp.plot.line(d4x,[d4y,dnp.fft.ifft(ds*dnp.power(filter,2)).real])
def test_finding_the_U_matrix(self):
import scisoftpy as dnp
import Crystal as c
import functions as f
import matplotlib.pyplot as plt
import finding_the_rotation_matrix as rm
import copy
import scitbx.math as scm
from scitbx.matrix import col as Vector
from scitbx.matrix import sqr as Rotator
def add_rot_error(vector):
stddev = 0.1
# rand_rotation_x = rm.Rotator(rm.Vector(1),stddev)#,dnp.random.normal(0,stddev))
# rand_rotation_y = rm.Rotator(rm.Vector(0,1),-stddev)#, dnp.random.normal(0,stddev))
# rand_rotation_z = rm.Rotator(rm.Vector(0,0,1),stddev)#,dnp.random.normal(0,stddev))
rand_axis = Vector([dnp.random.random(),dnp.random.random(),dnp.random.random()])
rand_rotation = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(rand_axis, stddev, deg=True))
vector = rand_rotation * vector
return vector
def random_rotation():
rand_rotation_x = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(Vector([1.0,0,0]) ,dnp.random.randint(0,361), deg=True))
rand_rotation_y = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(Vector([0,1.0,0]),dnp.random.randint(0,361), deg=True))
rand_rotation_z = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(Vector([0.0,0.0,1.0]),dnp.random.randint(0,361), deg=True))
return rand_rotation_z*rand_rotation_y*rand_rotation_x
def diff(U, data, vectors):
"""This is a function used to optimise the U matrix. It evaluates
"""
data = rm.rotate_list(U, data)
index_list=[]
for i, dat in enumerate(data):
diffs = []
dat = dat
for j, vector in enumerate(vectors):
diffs.append((dat-vector).length())
index = diffs.index(min(dnp.abs(diffs)))
index_list.append(index)
targets = [0]*len(data)
for i, idx in enumerate(index_list):
targets[i] = vectors[idx]
total = 0
for i, dat in enumerate(data):
total += (dat - targets[i]).length()
return total
mycrys = c.Crystal()
mycrys.load_cif('NiCO3_icsd_61067.cif')
l = f.group_reflections(mycrys)
vectors =[]
l_index = dnp.random.randint(len(l))
vectors = f.momentum_transfer_vectors(l[l_index], mycrys)
# plt.show()
all_vectors=[]
for i, group in enumerate(l):
all_g = f.momentum_transfer_vectors(group, mycrys)
all_vectors += all_g
fig = plt.figure()
ax = fig.add_subplot(311, projection='3d')
ax.set_title('Unedited Reciprocal Space')
f.plot_vectors(all_vectors, fig, ax)
all_vectors_copy = copy.deepcopy(all_vectors)
dot = 0
while dot<10**(-5) or 179.5<dot<180.5 or dot==None:
i = dnp.random.randint(len(vectors))
j=i
k=i
while i == j:
j = dnp.random.randint(len(vectors))
while i==k or j==k:
k = dnp.random.randint(len(vectors))
if k!=j and k!=i:
if dnp.abs(180-dnp.rad2deg(dnp.arccos(vectors[k].normalize().dot(vectors[i].normalize()))))%180.0 < 1:
k=i
if dnp.abs(180-dnp.rad2deg(dnp.arccos(vectors[k].normalize().dot(vectors[j].normalize()))))%180.0 < 1:
k=j
dot = dnp.rad2deg(dnp.arccos(vectors[i].normalize().dot(vectors[j].normalize())))
print dot
print l_index, i, j, k
print l[l_index][i][0]
print l[l_index][j][0]
print l[l_index][k][0]
mock_data = [vectors[i], vectors[j], vectors[k]]
mock_data = [add_rot_error(dat) for dat in mock_data]
rand_rot = random_rotation()
mock_data = rm.rotate_list(rand_rot, mock_data)
all_vectors_copy = rm.rotate_list(rand_rot, all_vectors_copy)
ax = fig.add_subplot(312, projection='3d')
ax.set_title('Randomly Rotated Reciprocal Space')
f.plot_vectors(all_vectors_copy, fig, ax)
U = rm.find_U_matrix(mock_data, mycrys, optimise_U=True)
rotator = U
difference = diff(U, all_vectors_copy, all_vectors)
print 'diff', difference
all_vectors_copy = rm.rotate_list(rotator, all_vectors_copy)
ax = fig.add_subplot(313, projection='3d')
ax.set_title('Randomly Rotated Reciprocal Space after U Matrix')
f.plot_vectors(all_vectors_copy, fig, ax)
# print 'Orientation', rand_rot
# print 'U matrix', rotator
plt.show()
# [mu, sigma, peak, gf] = fineGaussianFitting(y, "Plot 2");
[mu0, sigma0, peak, gf] = fineGaussianFitting(y);
n=x.size;
a=(x[n-1] - x[0])/(n-1); b=x[0];
mu=a*mu0+b;
sigma=a*sigma0;
#One vertical line on the peak point:
#xx, yy=dnp.array([mu-1, mu+1]), dnp.array([0, peak]);
xx, yy=dnp.array([mu-1, mu, mu+1]), dnp.array([0, peak, 0]);
xxx, yyy=dnp.array([mu]), dnp.array([peak]);
#To find the closest data point to the peak;
cPos=(dnp.abs(x-mu)).minPos()[0];
cX, cY=x[cPos], y[cPos];
print("To plot the fitted data." )
x1=dnp.linspace(x[0], x[n-1], 500);
y1=myGaussianFunc(mu, sigma, peak, [x1]);
#Line plot does not work
#dnp.plot.line(x, [y, y1] ) # plot line of evaluated function
#dnp.plot.updateline(xx, yy)
dnp.plot.points(x, y, None, 5);
sleep(1);
dnp.plot.addpoints(x1, y1, None, 1)
sleep(1);
dnp.plot.addpoints(xxx, yyy, None, 10);
def ideal_two_theta_gap(index, grouped_reflections, ideal_two_theta):
group = grouped_reflections[index]
two_theta = group[0][4]
return dnp.abs(two_theta-ideal_two_theta)
def test_at_random(cif_list, old_filter=False):
l = []
i = 0
j = i
k = i
print 'Choosing a cif file...'
while len(l) < 2:
mycrys = c.Crystal()
cif_indx = dnp.random.randint(len(cif_list))
cif = cif_list[cif_indx]
mycrys.load_cif(cif)
if old_filter:
l = f.group_reflections(mycrys, refl = 'allowed')
else:
l = f.group_reflections(mycrys)
if len(l)==0:
print 'Chose {0}'.format(cif)
print 'NEW FILTER: CASE FAILLED DUE TO NO REFLECITONS GETTING THROUGH FILTER'
print
print
log = open('test_log_with_error.txt', 'a')
log.write('Chose {0}'.format(cif)+'\n')
log.write('NEW FILTER: CASE FAILLED DUE TO NO REFLECITONS GETTING THROUGH FILTER')
log.write('\n \n')
log.close()
del cif_list[cif_indx]
return cif_list
new_l = []
for old_l in l:
if len(old_l) > 2:
new_l.append(old_l)
l = new_l
print 'Chose {0} now creating list of all vectors...'.format(cif)
log = open('test_log_with_error.txt', 'a')
log.write('Chose cif file: {0}'.format(cif))
log.write('\n \n')
log.close()
all_vectors = []
for i, group in enumerate(l):
all_g = f.momentum_transfer_vectors(group, mycrys)
all_vectors += all_g
# fig = plt.figure()
# ax = fig.add_subplot(311, projection='3d')
# f.plot_vectors(all_vectors, fig, ax)
print 'Created list of all vectors and it contains {0} vectors, now choosing reflections...'.format(len(all_vectors))
mock_data = []
while mock_data == []:
if len(l) == 0:
log = open('test_log_with_error.txt', 'a')
log.write("Couldn't find a good set of reflections so starting again...")
log.write('\n \n')
log.close()
print "Couldn't find a good set of reflections so starting again..."
return 'Start over'
l_index = dnp.random.randint(len(l))
vectors = f.momentum_transfer_vectors(l[l_index], mycrys)
combos = []
for permutation in permutations(range(len(vectors)), 3):
combos.append(permutation)
dot = 0
while dot<10**(-5) or 179.5<dot<180.5:
if len(combos) == 0:
del l[l_index]
mock_data = []
break
indx = dnp.random.randint(len(combos))
i, j, k = combos[indx]
del combos[indx]
dot = dnp.rad2deg(arccos(vectors[i].normalize().dot(vectors[j].normalize())))
if dnp.abs(180-dnp.rad2deg(arccos(vectors[k].normalize().dot(vectors[i].normalize()))))%180.0 < 1:
dot = 0
elif dnp.abs(180-dnp.rad2deg(arccos(vectors[k].normalize().dot(vectors[j].normalize()))))%180.0 < 1:
dot = 0
mock_data = [vectors[i], vectors[j], vectors[k]]
if len(combos) == 0 and dot<10**(-5) or 179.5<dot<180.5:
del l[l_index]
mock_data = []
break
print i, j, k , l_index, len(l)
log = open('test_log_with_error.txt', 'a')
log.write('Chose reflections {0}, {1} and {2}'.format(l[l_index][i][0], l[l_index][j][0], l[l_index][k][0]))
log.write('\n \n')
log.close()
print 'Chose reflections {0}, {1} and {2}, now making mock data...'.format(l[l_index][i][0], l[l_index][j][0], l[l_index][k][0])
mock_data = [add_rot_error(dat) for dat in mock_data]
rand_rot = random_rotation()
mock_data = rm.rotate_list(rand_rot, mock_data)
all_vectors_rot = rm.rotate_list(rand_rot, all_vectors)
# ax = fig.add_subplot(312, projection='3d')
# f.plot_vectors(all_vectors_rot, fig, ax)
print 'Created mock data. Now running tests...'
if test_data(mock_data, all_vectors_rot, all_vectors, mycrys,i, j, k, old_filter, vectors):
return True
else:
return False
rand_rotation_y = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(Vector([0,1.0,0]),dnp.random.randint(0,361), deg=True))
rand_rotation_z = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(Vector([0.0,0.0,1.0]),dnp.random.randint(0,361), deg=True))
return rand_rotation_z*rand_rotation_y*rand_rotation_x
mycrys = c.Crystal()
mycrys.load_cif('NiCO3_icsd_61067.cif')
l = f.group_reflections(mycrys)
vectors =[]
# l_index = 16#3
# vectors = f.momentum_transfer_vectors(l[l_index], mycrys)
while len(vectors)<3 or len(vectors)>7:
l_index = dnp.random.randint(len(l))
vectors = f.momentum_transfer_vectors(l[l_index], mycrys)
if len(vectors)>4:
M = scm.matrix.sqr(vectors[0].elems + vectors[2].elems + vectors[4].elems)
if dnp.abs(M.determinant())<10**-3 and len(vectors)>4:
vectors = [0,1,2,3,4,5,6,7,8]#len9>8
# f.plot_vectors(vectors)
# plt.show()
all_vectors=[]
for i, group in enumerate(l):
all_g = f.momentum_transfer_vectors(group, mycrys)
all_vectors += all_g
f.plot_vectors(all_vectors)
# fig = plt.figure()
# ax = fig.add_subplot(311, projection='3d')
# f.plot_vectors(all_vectors, fig, ax)
# all_vectors_copy = copy.deepcopy(all_vectors)
# dot = 0
# while dot<10**(-5) or 179.9<dot<180.1:
# i = dnp.random.randint(len(vectors))
def testPolyVal(self):
fr = fit.polyfit(self.x, self.y, 1)
v = fit.polyval(fr, [0,1])
print 'value is', dnp.abs(v-0.3)
self.checkitems([0.36, 3.55], v, 0)
def testPolyVal(self):
fr = fit.polyfit(self.x, self.y, 1)
v = fit.polyval(fr, [0, 1])
print('value is', dnp.abs(v - 0.3))
self.checkitems([0.36, 3.55], v, 0)
def test_finding_the_U_matrix(self):
import scisoftpy as dnp
import Crystal as c
import functions as f
import matplotlib.pyplot as plt
import finding_the_rotation_matrix as rm
import copy
import scitbx.math as scm
from scitbx.matrix import col as Vector
from scitbx.matrix import sqr as Rotator
def add_rot_error(vector):
stddev = 0.1
# rand_rotation_x = rm.Rotator(rm.Vector(1),stddev)#,dnp.random.normal(0,stddev))
# rand_rotation_y = rm.Rotator(rm.Vector(0,1),-stddev)#, dnp.random.normal(0,stddev))
# rand_rotation_z = rm.Rotator(rm.Vector(0,0,1),stddev)#,dnp.random.normal(0,stddev))
rand_axis = Vector([dnp.random.random(),dnp.random.random(),dnp.random.random()])
rand_rotation = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(rand_axis, stddev, deg=True))
vector = rand_rotation * vector
return vector
def random_rotation():
rand_rotation_x = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(Vector([1.0,0,0]) ,dnp.random.randint(0,361), deg=True))
rand_rotation_y = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(Vector([0,1.0,0]),dnp.random.randint(0,361), deg=True))
rand_rotation_z = Rotator(scm.r3_rotation_axis_and_angle_as_matrix(Vector([0.0,0.0,1.0]),dnp.random.randint(0,361), deg=True))
return rand_rotation_z*rand_rotation_y*rand_rotation_x
mycrys = c.Crystal()
mycrys.load_cif('NiCO3_icsd_61067.cif')
l = f.group_reflections(mycrys)
vectors =[]
# l_index = 16#3
# vectors = f.momentum_transfer_vectors(l[l_index], mycrys)
while len(vectors)<3 or len(vectors)>7:
l_index = dnp.random.randint(len(l))
vectors = f.momentum_transfer_vectors(l[l_index], mycrys)
if len(vectors)>4:
M = scm.matrix.sqr(vectors[0].elems + vectors[2].elems + vectors[4].elems)
if dnp.abs(M.determinant())<10**-3 and len(vectors)>4:
vectors = [0,1,2,3,4,5,6,7,8]#len9>8
f.plot_vectors(vectors)
# plt.show()
all_vectors=[]
for i, group in enumerate(l):
all_g = f.momentum_transfer_vectors(group, mycrys)
all_vectors += all_g
fig = plt.figure()
ax = fig.add_subplot(311, projection='3d')
f.plot_vectors(all_vectors, fig, ax)
all_vectors_copy = copy.deepcopy(all_vectors)
dot = 0
while dot<10**(-5) or 179.9<dot<180.1:
i = dnp.random.randint(len(vectors))
j=i
k=i
while i == j:
j = dnp.random.randint(len(vectors))
while i==k or j==k:
k = dnp.random.randint(len(vectors))
if k!=j and k!=i:
if dnp.abs(180-dnp.rad2deg(dnp.arccos(vectors[k].normalize().dot(vectors[i].normalize()))))%180.0 < 1:
k=i
if dnp.abs(180-dnp.rad2deg(dnp.arccos(vectors[k].normalize().dot(vectors[j].normalize()))))%180.0 < 1:
k=j
dot = dnp.rad2deg(dnp.arccos(vectors[i].normalize().dot(vectors[j].normalize())))
print l_index, i, j, k
i =0
j=4
k=3
mock_data = [vectors[i], vectors[j], vectors[k]]
mock_data = [add_rot_error(dat) for dat in mock_data]
rand_rot = random_rotation()
mock_data = rm.rotate_list(rand_rot, mock_data)
all_vectors_copy = rm.rotate_list(rand_rot, all_vectors_copy)
ax = fig.add_subplot(312, projection='3d')
f.plot_vectors(all_vectors_copy, fig, ax)
U = rm.find_U_matrix(mock_data, mycrys)
rotator = U
all_vectors_copy = rm.rotate_list(rotator, all_vectors_copy)
ax = fig.add_subplot(313, projection='3d')
f.plot_vectors(all_vectors_copy, fig, ax)
# print 'Orientation', rand_rot
# print 'U matrix', rotator
plt.show()