On 02/25/2017 05:54 AM, Loylick wrote:
I was looking through the documentation but I could not figure out how to make
graphic output of a simiple 1D plot like one I attached to this post.
I had to output my data to a file and draw the graph by hand to show it to
you. My data are just two columns: X, Y. When I look at gnuplot file generated
by
Dealii I see that it tries to draw my data as 2D plot.
Regards, Alex
|
MatrixOutmatrix_out;
FullMatrix<double>DBvsF;
DBvsF.reinit(2,1000);
std::vector<double> frequency;
doublew;
doublee =parameters.get_double("dissip");
unsignedintl;
unsignedintsz =frequency.size()-1;
for(l=0;l<1000; l++){
step =sqrt(w);
w+=step;
doubleval =log(DbAtFreq(w,&frequency,e));
DBvsF(0,l)=w;
DBvsF(1,l)=val;
}
std::ofstream out("DBvsFrequency.plt");
matrix_out.build_patches(DBvsF,"M");
matrix_out.write_gnuplot(out);
|
That's too complicated. MatrixOut is intended to visualize the elements of a
matrix, but you really just want to visualize pairs (x_i,y_i). Just output
these one by one to a file:
ofstream output("M");
for (l=0...) {
...
output << w << ' ' << val << std::endl;
}
and then visualize the resulting data using gnuplot's "plot" command.
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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