How to open and read .ffs file matlab?

Question

Bárbara Matos 2022-5-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1724740-how-to-open-and-read-ffs-file-matlab

评论： Voss 2022-5-22

采纳的回答： Voss

Hello! I have an .ffs file (see image 1).

I am doind this in matlab to get it and open it:

>> [radiationfile, path] = uigetfile('*.ffs');

>> radiationfile = fileread(radiationfile);

But now I don't know how to save the important parts of the file. I just want to save in an array the variables Phi (which corresponds to the first column), Theta (the second column) and so forth for the others.

I want to do this in appDesigner. The user chose some .ffs file and the code save the important variables, which can not always be in the same lines.

Is there any function I don't know to help me? I will send you the file in .txt just for you to understand better. I changed it to .txt because it is not possible to upload a .ffs file. But in the code I want that file to be .ffs

Thank you!!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Voss 2022-5-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1724740-how-to-open-and-read-ffs-file-matlab#answer_969285

在 MATLAB Online 中打开

SpiralAntennaBox_v02_FarField_4p5GHz.txt

% (first, make the attached .txt file an .ffs file)
copyfile('SpiralAntennaBox_v02_FarField_4p5GHz.txt','SpiralAntennaBox_v02_FarField_4p5GHz.ffs');

It looks like readmatrix will work; just specify 'FileType','text' due to the unrecognized extension:

% Option 1: use readmatrix:
data = readmatrix('SpiralAntennaBox_v02_FarField_4p5GHz.ffs','FileType','text')
data = 2701×6
         0         0    2.9787   -2.9930    5.3741   -5.4495
         0    5.0000    2.0783   -3.2030    5.3140   -4.6461
         0   10.0000    1.1357   -3.3278    5.1547   -3.8193
         0   15.0000    0.1911   -3.3455    4.9238   -3.0078
         0   20.0000   -0.7146   -3.2437    4.6496   -2.2469
         0   25.0000   -1.5427   -3.0211    4.3583   -1.5657
         0   30.0000   -2.2607   -2.6877    4.0708   -0.9861
         0   35.0000   -2.8439   -2.2627    3.8016   -0.5216
         0   40.0000   -3.2778   -1.7725    3.5583   -0.1773
         0   45.0000   -3.5578   -1.2467    3.3425    0.0490

Or, here's one way to complete the approach you were working on, using fileread:

% Option 2: use fileread:
radiationfile = fileread('SpiralAntennaBox_v02_FarField_4p5GHz.ffs');
idx = strfind(radiationfile,':');
data = str2num(radiationfile(idx(end)+1:end))
data = 2701×6
         0         0    2.9787   -2.9930    5.3741   -5.4495
         0    5.0000    2.0783   -3.2030    5.3140   -4.6461
         0   10.0000    1.1357   -3.3278    5.1547   -3.8193
         0   15.0000    0.1911   -3.3455    4.9238   -3.0078
         0   20.0000   -0.7146   -3.2437    4.6496   -2.2469
         0   25.0000   -1.5427   -3.0211    4.3583   -1.5657
         0   30.0000   -2.2607   -2.6877    4.0708   -0.9861
         0   35.0000   -2.8439   -2.2627    3.8016   -0.5216
         0   40.0000   -3.2778   -1.7725    3.5583   -0.1773
         0   45.0000   -3.5578   -1.2467    3.3425    0.0490

2 个评论
显示无隐藏无

Bárbara Matos 2022-5-22

Thank you very much! I think I will use the fisrt option, because the second option depends on the caracter ':' and it can create some problems on different files.

Thank you again, it works perfectly! :)