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Extract MoM matrix for multiple frequencies

ju1995

Hello,

I carried out a field simulation at 8 different frequencies (,,linearly spaced discrete points") and want to extract the MoM matrix at each frequency via mat2ascii.exe. Unfortunately, the suggested syntax mat2ascii filename.mat [b] (see image) does not work to extract the b=1,2,...,8 different MoM matrices. I only get one single result by executing mat2ascii filename.mat, but adding [b] always gives an error.

How can I access the 8 different MoM matrices?

2_mat2ascii.jpg

mat2ascii.jpg

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Mel

I tested a plate with plane wave source over 8 frequencies and was able to extract the 4th frequency as an example with

mat2ascii.exe plate.mat 4 > plate_fr4.txt

We would need more details such as Feko version, operating system, model details (if possible the cfx and out file) and error message obtained.

Matrix detected as version 5 Single precision storage used. Matrix size is  1347 x  1347 Matrix elements a(m,n) for block b=  4    m: index of the weighting function (matrix row)    n: index of the basis function (matrix column)        m     n             real part                imag. part     1    1      -3.673388622701168E-03    2.047378271818161E-01     2    1       1.808913773857057E-03    9.032395482063293E-02     3    1      -3.288674633949995E-03   -2.173543535172939E-02     4    1       1.611244282685220E-03    1.216704398393631E-02

ju1995

Sorry for my late response!

I should perhaps try to describe the error more precisely, as there is actually no error message:

For example mat2ascii filename.mat > zmatrix.txt or mat2ascii filename.mat 1 > zmatrix.txt correctly writes the MoM matrix data of the first frequency into a text file, whereas mat2ascii filename.mat 2 or higher indices lead to an empty text file (the data is only displayed in the Command Prompt).

I'm using FEKO 2018.2.1-343574 and Windows 10.

Thank you very much for your help!

platte.cfm

platte.out

Mel

Please attach the cfx file too.

ju1995

I'm sorry, here you are!

platte.cfx

Mel

I'm sorry, here you are!

I can create the 2nd frequency with

mat2ascii.exe platte.mat 2 > platte_fr2.txt

Matrix detected as version 5 Single precision storage used. Matrix size is 931 x 931 Matrix elements a(m,n) for block b= 2 m: index of the weighting function (matrix row) n: index of the basis function (matrix column)  m n real part imag. part 1 1 -3.050620667636395E-03 4.700279617309570E+01 2 1 4.405725630931556E-04 1.816418075561523E+01 3 1 1.456637983210385E-03 1.789700126647949E+01 4 1 -3.237338270992041E-03 -3.476630210876465E+00 5 1 1.458011916838586E-03 2.088384628295898E+00

Please give a screenshot of "the data is only displayed in the Command Prompt"

Note that in my case I have copied the mat2ascii.exe out of the bin folder to a different folder where I have full read/write access.

ju1995

Please find attached the cmd window at its top (cmd_1) and at its bottom (cmd_2) when executing mat2ascii.exe platte.mat 2 > platte_fr2.txt

I also put the mat2ascii file out of the bin folder to the same project folder, where the .mat file is located.

By the way: I have the same problem concerning the MoM matrix extraction for a simple 1D wire, which I simulated with the same 8 different frequencies today. Only the first frequency is writeable to a txt file.

Have you any idea, what the reason for my problem could be?

cmd_1.jpg

cmd_2.jpg

Mel

This may be a "long shot", but we have had issues in the past with folder and file names:

Please copy everything to C:\Temp or similar.

Ensure there are no special characters in the folder name, or file names, and no spaces, and try again.

ju1995

I copied everything in C:\Temp, but still the same problem. No special characters, spaces etc. in the file or folder names either. Are you running a different FEKO version or could you perhaps reproduce my problem with my specific FEKO version?

Mel

I have used the same version. I have unfortunately run out of ideas.

Please click here and then click "Contact support". There may be some more in depth debugging needed which will be better handled off-line.

ju1995

Perhaps I will try running the mat2ascii file on a different computer today as a last attempt. If this doesn't help I will contact the support.

Thank you very much for your efforts!