problems with import txt files as Matrix

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Aj
Aj on 25 Sep 2019
Edited: Aj on 24 Oct 2019
Hello guys,
I want to import a txt file in Matlab as matrix. The txt-file looks like:
0,5 1,2636e-003 -60,13 6,2933e-004 -1,0958e-003
1, 2,4385e-003 -112,91 -9,4937e-004 -2,2461e-003
1,5 2,6536e-003 -118,09 -1,2496e-003 -2,341e-003
2, 2,9698e-003 -123,29 -1,6301e-003 -2,4824e-003
2,5 3,4171e-003 -128,32 -2,1187e-003 -2,681e-003
3, 4,0399e-003 -133,03 -2,7566e-003 -2,9533e-003
3,5 4,9076e-003 -137,33 -3,6084e-003 -3,3262e-003
4, 6,1347e-003 -141,19 -4,7805e-003 -3,8448e-003
4,5 7,9257e-003 -144,62 -6,4617e-003 -4,5894e-003
5, 1,0681e-002 -147,63 -9,0215e-003 -5,718e-003
5,5 1,5305e-002 -150,29 -1,3292e-002 -7,5864e-003
6, 2,4349e-002 -152,62 -2,1621e-002 -1,1197e-002
6,5 4,886e-002 -154,69 -4,417e-002 -2,089e-002
7, 0,31779 -156,53 -0,2915 -0,12656
7,5 8,883e-002 21,81 8,2472e-002 3,3003e-002
8, 4,3338e-002 20,295 4,0648e-002 1,5032e-002
8,5 3,0694e-002 18,887 2,9042e-002 9,9359e-003
9, 2,5012e-002 17,549 2,3848e-002 7,5416e-003
9,5 2,2021e-002 16,238 2,1142e-002 6,1578e-003
10, 2,0453e-002 14,9 1,9765e-002 5,2591e-003
10,5 1,9533e-002 13,7 1,8978e-002 4,6264e-003
11, 1,9718e-002 12,136 1,9278e-002 4,1454e-003
11,5 2,1811e-002 9,8317 2,149e-002 3,7243e-003
12, 3,1873e-002 5,5674 3,1722e-002 3,0922e-003
12,5 3,5366e-002 170,88 -3,4919e-002 5,6045e-003
So used this:
type F50.txt;
M= readmatrix('F50.txt')
As result i get this:
M =
1.0e+04 *
0 NaN NaN NaN NaN 0.0001
0.0001 0.0002 NaN NaN NaN 0.0002
0.0001 NaN NaN NaN NaN 0.0000
0.0002 0.0002 NaN NaN NaN 0.0005
0.0002 NaN NaN NaN NaN 0.0001
0.0003 0.0004 NaN NaN NaN 0.0010
0.0003 NaN NaN NaN NaN 0.0003
0.0004 0.0006 NaN NaN NaN 0.0008
0.0004 NaN NaN NaN NaN 0.0006
0.0005 0.0001 NaN NaN NaN 0.0001
0.0005 NaN NaN NaN NaN 0.0006
0.0006 0.0002 NaN NaN NaN 0.0012
0.0006 NaN NaN NaN NaN 0.0001
0.0007 0 NaN NaN NaN 1.2656
0.0007 NaN NaN NaN NaN 0.0030
0.0008 0.0004 NaN NaN NaN 0.0050
0.0008 NaN NaN NaN NaN 0.0009
0.0009 0.0002 NaN NaN NaN 0.0005
0.0009 NaN NaN NaN NaN 0.0002
0.0010 0.0002 NaN NaN NaN 0.0003
0.0010 NaN NaN NaN NaN 0.0006
0.0011 0.0001 NaN NaN NaN 0.0001
How can i prevent factorizing like this.
Other Question is, how can i export txt files without the headlines? i only need the numbers.
Maybe you have a better method to import txt files.
Thanks for the help.

Accepted Answer

Rik
Rik on 25 Sep 2019
Edited: Rik on 25 Sep 2019
Read the file as text (e.g. with the textscan function), replace the comma with a point and convert the char array to double. The code below should help.
fid=fopen('data.txt','r');
data=textscan(fid,'%s\t%s\t%s\t%s\t%s','HeaderLines',1);
fclose(fid);
data=[data{:}];%unwrap
%replace , with . and convert char to double
fun=@(str) str2double(strrep(str,',','.'));
output=cellfun(fun,data);
  2 Comments
Aj
Aj on 25 Sep 2019
Sorry,
Can u explain it little bit more, i am a beginner in matlab.
Rik
Rik on 25 Sep 2019
Edited: Rik on 25 Sep 2019
You have a question posted on this forum almost two years ago, so I don't think 'beginner' is a valid description.
See my edited answer for one way to do this.

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