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gplot_histoL
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Thu, Jul 10, 08:27

gplot_histoL
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#!/usr/bin/env python
'''
Plot an histogram of angular momentum of particles
Yves Revaz
Wed Aug 31 14:31:49 CEST 2005
'''
from numarray import *
from Nbody import *
import SM
import string
import sys
import os
from libjeans import *
from Nbody.libutil import histogram
try:
from optparse import OptionParser
except ImportError:
from optik import OptionParser
def parse_options():
usage = "usage: %prog [options] file"
parser = OptionParser(usage=usage)
parser.add_option("-t",
action="store",
dest="ftype",
type="string",
default = None,
help="type of the file",
metavar=" TYPE")
parser.add_option("--lmin",
action="store",
dest="lmin",
type="float",
default=None,
help="min value in Lz")
parser.add_option("--lmax",
action="store",
dest="lmax",
type="float",
default=None,
help="max value in Lz")
parser.add_option("--dl",
action="store",
dest="dl",
type="float",
default=None,
help="interval in Lz")
parser.add_option("--miny",
action="store",
dest="mny",
type="float",
default=None,
help="min value in y")
parser.add_option("--maxy",
action="store",
dest="mxy",
type="float",
default=None,
help="max value in y")
parser.add_option("--gas",
action="store_true",
dest="gas",
default = 0,
help="keep only gas")
parser.add_option("-p",
action="store",
dest="ps",
type="string",
default = None,
help="postscript filename",
metavar=" FILE")
parser.add_option("-c",
action="store",
dest="colors",
type="string",
default = None,
help="colors",
metavar=" 0,64,192")
(options, args) = parser.parse_args()
if options.colors!=None:
exec("options.colors = array([%s])"%(options.colors))
if len(args) == 0:
print "you must specify a filename"
sys.exit(0)
files = args
return files,options
#############################
# graph
#############################
# get options
files,options = parse_options()
ps = options.ps
lmin = options.lmin
lmax = options.lmax
dl = options.dl
hmin = options.mny
hmax = options.mxy
col = options.colors
ftype = options.ftype
gas = options.gas
# set colors
colors = {}
i = 0
for file in files:
if col!=None:
colors[file]=col[i]
else:
colors[file] = i*255/len(files)
i = i + 1
#######################################
# open sm
#######################################
if ps==None:
g = SM.plot("x11 -bg white -fg black ")
else:
g = SM.plot("postencap %s"%ps)
# some init
g.palette('bgyrw')
g.expand(0.999)
g.setvariable('TeX_strings', '1')
#######################################
# first
g.location(3500, 31000, 3500, 31000)
#######################################
# LOOP
#######################################
vs = array([],Float)
ts= array([],Float)
for file in files:
# open file
nb = Nbody(file,ftype=ftype)
print nb.tnow
nb.histocenter()
if gas:
nb = nb.select('gas')
lz = nb.l()[:,2]
if lmin == None:
lmin = min(lz)
if lmax == None:
lmax = max(lz)
if dl == None:
dl = (lmax-lmin)/50.
bins = arange(lmin,lmax,dl)
h = histogram(lz,bins)
if hmin == None:
hmin = min(h)
if hmax == None:
hmax = max(h)
if file == files[0]:
g.location(3500, 31000, 3500, 31000)
g.limits(lmin,lmax,hmin,hmax)
g.box()
# color
g.ctype(colors[file])
g.histogram(bins,h)
g.ctype(0)
g.xlabel('l')
g.ylabel('N')
# -- end ---
if ps==None:
g.show()
else:
g.write()
g.clean()

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