Startup

script/PbpgSlowXScan.py

@@ -0,0 +1,38 @@
+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)
+