Changeset 12951

Timestamp:

02/28/12 17:43:28 (13 years ago)

Author:

neise

Message:

debugged interpolation of zero-x-ing time in class ZeroXing

File:

• fact/tools/pyscripts/pyfact/extractor.py (modified) (1 diff)

fact/tools/pyscripts/pyfact/extractor.py

@@ -82 +82 @@
                         continue
                 if ( pix_data[i] * pix_data[i+1] <= 0 ):
-                    time = (pix_data[i+1]*i-pix_data[i]*(i+1))
+                    # interpolate time of zero crossing with 
+                    # linear polynomial: y = ax + b
+                    a = (pix_data[i+1] - pix_data[i]) / ((i+1) - i)
+                    time = -1.0/a * pix_data[i] + i
                     hits.append(time)
             all_hits.append(hits)