################################################################################################### 
# Simple alignment example
################################################################################################### 


from mathutils import *
from plotutils import * 

scan_range = 2.0
step_size = 0.1

r = lscan(motor,sinp,-scan_range,scan_range,[step_size,],relative=True)

p=get_plots()[0]
p.setLegendVisible(True)
y = r[sinp]
x = r[motor]

fit_pars = (offset, normalization, mean_val, sigma) = fit_gaussian_offset(y, x)
print fit_pars

if (mean_val is not None):
    gaussian = GaussianOffset(*fit_pars)    
    plot_function(p, gaussian, "Fit" , x)
    
#Fitting error
if mean_val is None or  mean_val<x[0]  or  mean_val>x[-1]:   
    mean_val= x[y.index(max(y))]    
    print "Fitting error - using max value"

    
p.addMarker(mean_val, None, "Mean=" + str(round(mean_val,2)), Color.LIGHT_GRAY)
motor.move(mean_val)