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[WIP] Output subset of all fields #379

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[WIP] Output subset of all fields #379

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14 changes: 9 additions & 5 deletions src/pyclaw/io/ascii.py
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,8 @@ def write(solution,frame,path,file_prefix='fort',write_aux=False,
- *options* - (dict) Dictionary of optional arguments dependent on
the format being written. ``default = {}``
"""
output_fields = options.get('output_fields',range(solution.num_eqn))

try:
# Create file name
file_name = '%s.t%s' % (file_prefix,str(frame).zfill(4))
Expand Down Expand Up @@ -69,7 +71,7 @@ def write(solution,frame,path,file_prefix='fort',write_aux=False,
else:
q = state.q

write_array(q_file, patch, q)
write_array(q_file, patch, q, output_fields)

if state.num_aux > 0 and write_aux:
write_patch_header(aux_file,state.patch)
Expand Down Expand Up @@ -115,31 +117,33 @@ def write_patch_header(f,patch):
f.write("\n")


def write_array(f,patch,q):
def write_array(f,patch,q,fields=None):
"""
Write a single array to output file f as ASCII text.

The variable q here may in fact refer to q or to aux.
"""
if fields is None:
fields = xrange(q.shape[0]) # Output all fields by default

dims = patch.dimensions
if patch.num_dim == 1:
for k in xrange(dims[0].num_cells):
for m in xrange(q.shape[0]):
for m in fields:
f.write("%18.8e" % q[m,k])
f.write('\n')
elif patch.num_dim == 2:
for j in xrange(dims[1].num_cells):
for k in xrange(dims[0].num_cells):
for m in xrange(q.shape[0]):
for m in fields:
f.write("%18.8e" % q[m,k,j])
f.write('\n')
f.write('\n')
elif patch.num_dim == 3:
for l in xrange(dims[2].num_cells):
for j in xrange(dims[1].num_cells):
for k in xrange(dims[0].num_cells):
for m in xrange(q.shape[0]):
for m in fields:
f.write("%18.8e" % q[m,k,j,l])
f.write('\n')
f.write('\n')
Expand Down