8. Very rudimentary peak-finding

The following scripts looks through a file with one x column and several y columns, and returns values larger than a certain cutoff.

Usage:
findpeaks filename columnnumber cutoffvalue
e.g.
findpeaks test.dat 3 0.01

findpeaks:
#!/usr/bin/python2.6
import sys
infile=sys.argv[1]
colno=int(sys.argv[2])
cutoff=float(sys.argv[3])

minsig=100
maxsig=0


spectra=open(infile,'r')



for spectrum in spectra:
spectrum=spectrum.rstrip('\n')
spectrum=spectrum.split(' ')
# print spectrum

try:
spectrum[colno]=float(spectrum[colno])
if spectrum[colno]>cutoff:
print spectrum[1],' ',spectrum[colno]

if spectrum[colno]<minsig:
minsig=spectrum[colno]
if spectrum[colno]>maxsig:
maxsig=spectrum[colno]


except:
a=0
maxsig=0
print "not working: "

print "max sig: ",maxsig,", minsig: ",minsig
spectra.close