39 lines
1.1 KiB
Python
Executable File
39 lines
1.1 KiB
Python
Executable File
from mathutils import fit_polynomial
|
|
from mathutils import PolynomialFunction
|
|
import math
|
|
from plotutils import plot_function
|
|
print "Starting"
|
|
|
|
|
|
#Creating averaging devices
|
|
avg_x = create_averager(pbpg_slow_x, count = 30, interval = 1, name = "avg_x")
|
|
|
|
#The actuals scan
|
|
r=lscan(pbpg_mx, avg_x, -1.5, 1.5, 30, latency = 0.0)
|
|
|
|
#Fitting
|
|
values = to_array(r.getReadable(0), 'd')
|
|
positions = r.getPositions(0)
|
|
try:
|
|
pars_polynomial = fit_polynomial(values, positions, 1)
|
|
except:
|
|
print "Fit error"
|
|
raise
|
|
|
|
print "Plolynomial pars: ", pars_polynomial
|
|
(a0, a1) = pars_polynomial
|
|
#Writing metadata to data file
|
|
path = get_exec_pars().scanPath
|
|
print "Scn path: ", path
|
|
set_attribute(path, "a0", a0)
|
|
set_attribute(path, "a1", a1)
|
|
#set_attribute(path, "a2", a2)
|
|
|
|
#Plotting fit and writing fitting parameters
|
|
outp = "a0="+ ("%0.4f" % a0) + "a1="+ ("%0.4f" % a1)
|
|
print outp
|
|
p = get_plots()[0]
|
|
p.addText((min(positions) + max(positions))/2, max(values), outp, Color.BLACK)
|
|
plot_function(p, PolynomialFunction(pars_polynomial), "Fit",positions, show_points = False, show_lines = True, color = Color.BLUE)
|
|
|