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## Automatically adapted for scipy Oct 31, 2005 by
# Copyright (c) 1996, 1997, The Regents of the University of California.
# All rights reserved. See Legal.htm for full text and disclaimer.
from scipy import *
from numpy.core.umath import *
from ezplot import *
def paws ( ) :
i = raw_input ("Type in any string to continue; ^C to return to prompt. ")
return
print "This program tests ezplot. Type demo () to begin the test."
paws ()
# ezcshow("false")
def demo ():
import scipy
rand = numpy.rand
vsf = 0.
c = 1
s = 1000.
kmax = 25
lmax = 35
# The following computations define an interesting 3d surface.
xr = multiply.outer ( arange (1, kmax + 1), ones (lmax))
yr = multiply.outer ( ones (kmax), arange (1, lmax + 1))
zt = 5. + xr + .2 * rand (kmax, lmax) # ranf (xr)
rt = 100. + yr + .2 * rand (kmax, lmax) # ranf (yr)
z = s * (rt + zt)
z = z + .02 * z * rand (kmax, lmax) # ranf (z)
ut = rt/sqrt (rt ** 2 + zt ** 2)
vt = zt/sqrt (rt ** 2 + zt ** 2)
ireg = array(multiply.outer ( ones (kmax), ones (lmax)),'i')
ireg [0:1, 0:lmax]=0
ireg [0:kmax, 0:1]=0
ireg [1:15, 7:12]=2
ireg [1:15, 12:lmax]=3
ireg [3:7, 3:7]=0
freg=ireg + .2 * (1. - rand (kmax, lmax)) # ranf (ireg))
freg=freg.astype (Float)
#rt [4:6, 4:6] = -1.e8
z [3:10, 3:12] = z [3:10, 3:12] * .9
z [5, 5] = z [5, 5] * .9
z [17:22, 15:18] = z [17:22, 15:18] * 1.2
z [16, 16] = z [16, 16] * 1.1
cgm("close")
win("on")
set_mesh(rt=rt,zt=zt,ireg=ireg)
titleb("An interesting mesh")
plotm()
nf()
paws()
titleb("Plot with ranges")
plotm(kstyle="dashed", lstyle = "dotted", krange = (0, 20), lrange = (0,10),
color = "yellow", thick = 2)
nf ( )
paws()
titleb("L lines only")
plotb ( )
plotm(kstyle="none", lstyle="dashed", color="orange")
nf ( )
paws ()
k2 = 3
l2 = 7
plotb ( )
titleb("Region 2 singled out")
plotm (region = 2, kstyle = "dashed", lstyle = "dotted", color = "green")
text("Region 2", zt [k2, l2], rt [k2, l2], 32.)
nf ()
paws ( )
titlet("A different contour plot")
plotc(pvar = z, lev = 20)
nf ()
paws ( )
titlet("Same plot filled.")
plotc(pvar = z, lev = 20, color = "fill")
nf ()
paws ( )
clear_mesh ( )
nz=20
xs = array ( range (-nz-1, nz+1) )
ys = xs
zs = zeros ( (2*nz + 2, 2*nz + 2), Float)
for i in range ( len (xs) ) :
for j in range ( len (ys)) :
rs = sqrt ( xs [i] * xs[i] + ys [j] * ys [j] ) + 1.e-12
zs [i, j] = sin (rs) / rs
titleb("Sombrero, contour plot")
plotc (pvar = zs, zt = ys, rt = xs, lev = 12)
nf ( )
paws ( )
titleb("Sombrero, logarithmic contour plot")
plotc (pvar = zs, zt = ys, rt = xs, lev = -12)
nf ( )
paws ( )
titleb("Sombrero, filled contour plot")
plotc (pvar = zs, zt = ys, rt = xs, lev = 12, color = "fill")
nf ( )
paws ( )
attr (labels = "yes")
titleb("Sombrero, contour plot using plotz.")
plotz (zs, xs, ys, lev = 12)
nf ( )
paws ( )
attr (labels = "no")
titleb("Sombrero, filled mesh, linear")
plotf (zs, ys, xs)
nf ( )
paws ( )
titleb("Sombrero, filled mesh, logarithmic")
plotf (zs, ys, xs, cscale = "log")
nf ( )
paws ( )
titleb("Sombrero, filled mesh, normal")
plotf (zs, ys, xs, cscale = "normal")
nf ( )
paws ()
nz = 80
xs = array ( range (-nz-1, nz+1) )/4.
ys = xs
zs = zeros ( (2*nz + 2, 2*nz + 2), Float)
for i in range ( len (xs) ) :
for j in range ( len (ys)) :
rs = sqrt ( xs [i] * xs[i] + ys [j] * ys [j] ) + 1.e-12
zs [i, j] = sin (rs) / rs
titleb("Sombrero, cell array plot")
ploti (zs)
nf ( )
paws ( )
# Vector stuff
x = zeros ( (10, 10), Float)
y = zeros ( (10, 10), Float)
vx = zeros ( (10, 10), Float)
vy = zeros ( (10, 10), Float)
ireg = zeros ( (10, 10), Int)
for i in range (10) :
for j in range (10) :
vy [i, j] = sin (i)
vx [i, j] = cos (j)
y [i, j] = j
x [i, j] = i
ireg [1:5, 1:5] = 1
ireg [1:5, 5:10] = 2
ireg [5:10, 1:5] = 3
ireg [5:10, 5:10] = 4
titleb ("A vector plot")
plotv (y, x, vy, vx, ireg, vsc = 0.5, thick = 0.1, color = "red")
nf ( )
paws ( )
set_mesh (rt = y, zt = x, ut = vy, vt = vx, ireg = ireg)
titleb ("Vector plot, regions 1 and 4.")
plotv (vsc = 0.35, region = [1,4], color = "blue")
nf ( )
paws ( )
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