Demo of running the Classic Clawpack Fortran code and producing an animation of results¶
If you’re viewing this notebook online and wish to run it, you can download it from here.
The environment variable CLAW should be set before starting the notebook:
In [1]:
import os
CLAW = os.environ['CLAW']
print CLAW
/Users/rjl/git/clawpack
Move to the desired directory:
In [2]:
os.chdir(CLAW + '/classic/examples/acoustics_1d_example1/')
print os.getcwd()
/Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1
In [3]:
%%system
make output
Out[3]:
['rm -f .output',
'python /Users/rjl/git/clawpack/clawutil/src/python/clawutil/runclaw.py xclaw _output \\',
'\tTrue False . False',
'Reading data file: claw.data ',
' first 5 lines are comments and will be skipped',
' running...',
' ',
'Reading data file: setprob.data ',
' first 5 lines are comments and will be skipped',
'CLAW1EZ: Frame 1 output files done at time t = 0.5000D-01',
'',
'CLAW1EZ: Frame 2 output files done at time t = 0.1000D+00',
'',
'CLAW1EZ: Frame 3 output files done at time t = 0.1500D+00',
'',
'CLAW1EZ: Frame 4 output files done at time t = 0.2000D+00',
'',
'CLAW1EZ: Frame 5 output files done at time t = 0.2500D+00',
'',
'CLAW1EZ: Frame 6 output files done at time t = 0.3000D+00',
'',
'CLAW1EZ: Frame 7 output files done at time t = 0.3500D+00',
'',
'CLAW1EZ: Frame 8 output files done at time t = 0.4000D+00',
'',
'CLAW1EZ: Frame 9 output files done at time t = 0.4500D+00',
'',
'CLAW1EZ: Frame 10 output files done at time t = 0.5000D+00',
'',
'CLAW1EZ: Frame 11 output files done at time t = 0.5500D+00',
'',
'CLAW1EZ: Frame 12 output files done at time t = 0.6000D+00',
'',
'CLAW1EZ: Frame 13 output files done at time t = 0.6500D+00',
'',
'CLAW1EZ: Frame 14 output files done at time t = 0.7000D+00',
'',
'CLAW1EZ: Frame 15 output files done at time t = 0.7500D+00',
'',
'CLAW1EZ: Frame 16 output files done at time t = 0.8000D+00',
'',
'==> runclaw: Will take data from /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1',
'==> runclaw: Will write output to /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'==> runclaw: Removing all old fort files in /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'',
'==> runclaw: Finished executing',
'',
'==> runclaw: Done executing /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/xclaw via clawutil.runclaw.py',
'==> runclaw: Output is in /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output']
In [4]:
%%system
make plots
Out[4]:
['rm -f .plots',
'python /Users/rjl/git/clawpack/visclaw/src/python/visclaw/plotclaw.py _output _plots setplot.py ',
'Importing setplot.setplot from /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1.',
'Executed setplot successfully',
'Will plot 17 frames numbered: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]',
'Will make 1 figure(s) for each frame, numbered: [1]',
'',
'-----------------------------------',
'',
'',
'Creating html pages for figures...',
'',
"Directory '/Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_plots' ",
' already exists, files may be overwritten ',
'Now making png files for all figures...',
' Reading Frame 0 at t = 0 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 0 at time t = 0.0',
' Reading Frame 1 at t = 0.05 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 1 at time t = 0.05',
' Reading Frame 2 at t = 0.1 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 2 at time t = 0.1',
' Reading Frame 3 at t = 0.15 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 3 at time t = 0.15',
' Reading Frame 4 at t = 0.2 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 4 at time t = 0.2',
' Reading Frame 5 at t = 0.25 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 5 at time t = 0.25',
' Reading Frame 6 at t = 0.3 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 6 at time t = 0.3',
' Reading Frame 7 at t = 0.35 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 7 at time t = 0.35',
' Reading Frame 8 at t = 0.4 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 8 at time t = 0.4',
' Reading Frame 9 at t = 0.45 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 9 at time t = 0.45',
' Reading Frame 10 at t = 0.5 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 10 at time t = 0.5',
' Reading Frame 11 at t = 0.55 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 11 at time t = 0.55',
' Reading Frame 12 at t = 0.6 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 12 at time t = 0.6',
' Reading Frame 13 at t = 0.65 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 13 at time t = 0.65',
' Reading Frame 14 at t = 0.7 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 14 at time t = 0.7',
' Reading Frame 15 at t = 0.75 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 15 at time t = 0.75',
' Reading Frame 16 at t = 0.8 from outdir = /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_output',
'Frame 16 at time t = 0.8',
'',
'-----------------------------------',
'',
'Creating latex file...',
"Directory '/Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_plots' ",
' already exists, files may be overwritten ',
'',
'Latex file created: ',
' /Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_plots/plots.tex',
'',
'Use pdflatex to create pdf file',
'Created JSAnimation for figure 1',
'',
'--------------------------------------------------------',
'',
'Point your browser to:',
' file:///Users/rjl/git/clawpack/classic/examples/acoustics_1d_example1/_plots/_PlotIndex.html',
'python(45105,0x7fff76101180) malloc: *** error for object 0x10413f410: pointer being freed was not allocated',
'*** set a breakpoint in malloc_error_break to debug',
'make: *** [plots] Abort trap: 6']
To display a single frame:¶
In [6]:
from IPython.display import Image
frameno = 2
fname = '_plots/frame00%sfig1.png' % str(frameno).zfill(2)
print "showing ",fname
i = Image(fname)
display(i)
showing _plots/frame0002fig1.png
One way to display a sequence of plot images as an animation:¶
In [8]:
import glob
from matplotlib import image
from clawpack.visclaw.JSAnimation import IPython_display
from matplotlib import animation
figno = 1
fname = '_plots/*fig' + str(figno) + '.png'
filenames=sorted(glob.glob(fname))
fig = plt.figure()
im = plt.imshow(image.imread(filenames[0]))
def init():
im.set_data(image.imread(filenames[0]))
return im,
def animate(i):
image_i=image.imread(filenames[i])
im.set_data(image_i)
return im,
animation.FuncAnimation(fig, animate, init_func=init,
frames=len(filenames), interval=20, blit=True)
Out[8]:
Another approach to animation:¶
Based on the pyclaw example at https://www.wakari.io/usermgmt/nb/pyclaw/Figure_7_2
This only works if the notebook is running, whereas the above animation should play from nbviewer.
In [9]:
import matplotlib.pyplot as plt
import time
from IPython.display import clear_output
def solution_plot(n,setplot=None,outdir='./_output'):
from clawpack.visclaw import data, frametools
plotdata = data.ClawPlotData()
plotdata.outdir = outdir
if setplot is None:
from setplot import setplot
plotdata.setplot = setplot
plotdata = frametools.call_setplot(setplot,plotdata)
frametools.plotframe(n,plotdata)
for n in range(5):
solution_plot(n)
time.sleep(0.2)
clear_output()
f=plt.gcf()
display(f)
plt.clf()
<matplotlib.figure.Figure at 0x106b9bad0>
In [ ]:
