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from matplotlib import pyplot as plt
from numpy import arange, zeros, linspace, sign
from idmlin import IDMLin
t = 1.5
amin, amax, acount = 0.2, 0.6, 15
bmin, bmax, bcount = 2, 4, 20
arng = linspace(amin, amax, acount)
brng = linspace(bmin, bmax, bcount)
s0 = 2
v0 = 30
re = 0.5
ns = (12, 15, 20, 50)
#f, axarr = plt.subplots(2, len(ns)+1, sharex=True, sharey=True)
f, axarr = plt.subplots(2, 2, sharex=True, sharey=True)
allstab = zeros((len(arng), len(brng)))
alloss = zeros((len(arng), len(brng)))
for i, n in enumerate(ns):
stab = zeros((len(arng), len(brng)))
oss = zeros((len(arng), len(brng)))
def isstable(a, b):
idm = IDMLin(t=t, a=a, b=b, s0=s0)
idm.go(v0, re)
if idm.isloopstable(n):
return 1, sign(idm.os())
else:
return 0, sign(idm.os())
for ai, a in enumerate(arng):
for bi, b in enumerate(brng):
stab[ai, bi], oss[ai, bi] = isstable(a,b)
axarr[0, i*0].imshow(stab, cmap=plt.cm.Reds,
interpolation='none',
extent=[bmin, bmax, amax, amin],
aspect='auto',
)
axarr[1, i*0].imshow(oss, cmap=plt.cm.Reds,
interpolation='none',
extent=[bmin, bmax, amax, amin],
aspect='auto',
)
allstab += stab
alloss += oss
axarr[0, -1].imshow(allstab, cmap=plt.cm.Reds,
interpolation='none',
extent=[bmin, bmax, amax, amin],
aspect='auto',
)
axarr[1, -1].imshow(alloss, cmap=plt.cm.Reds,
interpolation='none',
extent=[bmin, bmax, amax, amin],
aspect='auto',
)
allstab += stab
alloss += oss
plt.show()