Thank you for your suggestions and sorry about late reply. I decided to
simplify the starting mesh and display the resulting matrix using
*MatrixOut*, so that I can check whether I went wrong in assembling the
matrix. But after using the following code to get the output matrix
data file, I don't know how to display the the matrix in gnuplot with their
values showing in the corresponding positions.
|
FullMatrix<double>
<http://dealii.org/8.4.1/doxygen/deal.II/classFullMatrix.html>M;
...// fill matrix M with some values
// now write out M:
MatrixOut
<http://dealii.org/8.4.1/doxygen/deal.II/classMatrixOut.html>matrix_out;
std::ofstream out("M.gnuplot");
matrix_out.build_patches
<http://dealii.org/8.4.1/doxygen/deal.II/classMatrixOut.html#a0d01113fd37dfa352dc237f3d05c2182>(M,"M");
matrix_out.write_gnuplot
<http://dealii.org/8.4.1/doxygen/deal.II/classDataOutInterface.html#a471d836d307c6e888ab3b5ad81fe0416>(out);
|
I tried to use
|
plot 'M.gnuplot'matrix
|
but all I get is some point without values showing up. Opening this file with
Emacs, the values can be found, but their orderings are not convenient.
Do you know how to display this data file so that they can show the values in
correct order just like in MATLAB.
You can do this in gnuplot:
set style data lines
set hidden3d
splot "M.gnuplot" using 1:2:3
Best
W.
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Wolfgang Bangerth email: bange...@math.tamu.edu
www: http://www.math.tamu.edu/~bangerth/
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