Trying to format the output of a matrix, B. Sage reports: type 'print obj.str()' to see all of the entries) But print B.str() doesn't give me any format options. Is there a way control output like a regular print statement?
Thanks, -d
If you want to print only, say, 3 significant digits, you can do:
sage: B = random_matrix(RDF,5,5)
sage: B
[ 0.23432333232 -0.227616100926 -0.599156411098 0.41166189832 0.764641434688]
[ 0.439380654181 -0.320536940171 0.320947963409 -0.847122064875 0.404266447713]
[ -0.908186671809 0.622848454479 0.219215554761 -0.872284101116 -0.286278011806]
[ -0.68809928219 0.779797277388 0.12146772553 0.864262076944 -0.0156592746181]
[ 0.807522456479 -0.294491803547 -0.569575247674 -0.850921782049 -0.521678331812]
sage: print B.str(rep_mapping=lambda x : str(x.n(digits=3)))
[ 0.234 -0.228 -0.599 0.412 0.765]
[ 0.439 -0.321 0.321 -0.847 0.404]
[ -0.908 0.623 0.219 -0.872 -0.286]
[ -0.688 0.780 0.121 0.864 -0.0157]
[ 0.807 -0.294 -0.570 -0.851 -0.522]
Type
sage: B.str?
to see some options like this:
sage: B = matrix(5,5)
sage: print B.str(zero="Hi Mom")
[Hi Mom Hi Mom Hi Mom Hi Mom Hi Mom]
[Hi Mom Hi Mom Hi Mom Hi Mom Hi Mom]
[Hi Mom Hi Mom Hi Mom Hi Mom Hi Mom]
[Hi Mom Hi Mom Hi Mom Hi Mom Hi Mom]
[Hi Mom Hi Mom Hi Mom Hi Mom Hi Mom]
But perhaps you are talking about other formatting options? More details could be helpful here.
This is what I'm trying to describe. The formatting is all over the place. Just trying to control the number of significant digits.
-d
print B
[ 10.0 7.79934088913 5.73251431925 3.89141577098 2.31956702459 1.02571695446 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0]
[ 10.0 8.05299001202 6.19851770151 4.50910708097 3.03012495201 1.78330079324 0.774303525753 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0]
[ 10.0 8.21410145744 6.49945939383 4.91636989937 3.50852490926 2.30305774077 1.31391330977 0.546179897277 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0]
Asked: 2013-10-15 20:20:44 +0100
Seen: 5,240 times
Last updated: Oct 17 '13
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