def correct(self,mon,dio,plot=False):
pp = self.poly
x0 = (-pp[1]+np.sqrt(pp[1]**2-4*pp[0]*pp[2]))/2/pp[0]
if ( x0<0 ):
dioC = dio-pp[2]
monC = mon
else:
monC = mon-x0
dioC = dio
if (pp[0]>0):
monC = monC + pp[0]/pp[1]*monC**2
else:
dioC = dioC - pp[0]*monC**2
if (plot):
toolsPlot.nfigure("Check non lin correction")
pl.plot(mon,dio/mon,"+",label = "before correction")
pl.plot(monC,dioC/monC,"o",label = "after correction")
pl.ylabel("ratio signal/monitor")
pl.legend()
pl.grid()
return (monC,dioC)
def calibrate(self,mon,dio,plot=False):
self.mon = mon
self.dio = dio
self.poly = np.polyfit(mon,dio,2)
if (plot):
toolsPlot.nfigure("calibration")
ax1=pl.subplot("211",title="det vs monitor (before correction)")
pl.plot(mon,dio,"+")
m=np.min(mon); M=np.max(mon)
x = np.arange(m,M,(M-m)/100.)
pl.plot(x,np.polyval(self.poly,x))
pl.subplot("212",title="Ratio vs monitor",sharex=ax1)
#pl.plot(mon,dio/mon,"+",label="before")
M=mon.max()
m=mon.min()
h1 = np.histogram(mon,np.arange(m,M,(M-m)/30.),weights=dio/mon)
h0 = np.histogram(mon,np.arange(m,M,(M-m)/30.),)
pl.plot(toolsPlot.histVecCenter(h1[1]),h1[0]/h0[0],label="before")
mon,dio=self.correct(mon,dio)
h1 = np.histogram(mon,np.arange(m,M,(M-m)/30.),weights=dio/mon)
h0 = np.histogram(mon,np.arange(m,M,(M-m)/30.),)
pl.plot(toolsPlot.histVecCenter(h1[1]),h1[0]/h0[0],label="after")
pl.legend()
