Matrix to be printed to a text file
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Hi, I have the following matrix AA=[Nan 1 2 3 Nan 4 5 6 Nan 7 8 9 Nan 10 Nan Nan] I want to print this matrix to a file: myfile.txt the code looks like:
fid01 = fopen('mynewfile.txt', 'w'); fprintf(fid01, '%9.8E %9.8E %9.8E %9.8E\n', transpose(AA)); fclose('all');
As one can see, one has to use transpose function in order to print correct the matrix in myfile.txt. But because of Nan the following error occurs:
"Invalid file identifier. Use fopen to generate a valid file identifier." How can avoid this. I have to use NaN in my matrix in order to replace with blanks so in myfile.txt I should have
'' 1 2 3
'' 4 5 6
'' 7 8 9
'' 10 '' ''
The file will be huge [210000x4] ~ 20 MB.
Thank you
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Stephen23
2015-6-23
编辑:Stephen23
2015-6-23
There should be no problem with writing NaN's to text file:
AA = [NaN,1,2,3;NaN,4,5,6;NaN,7,8,9;NaN,10,NaN,NaN];
fid = fopen('temp.txt','wt');
fprintf(fid,'%9.8E %9.8E %9.8E %9.8E\n',AA.');
fclose(fid);
And the generated text file:
NaN 1.00000000E+00 2.00000000E+00 3.00000000E+00
NaN 4.00000000E+00 5.00000000E+00 6.00000000E+00
NaN 7.00000000E+00 8.00000000E+00 9.00000000E+00
NaN 1.00000000E+01 NaN NaN
Can you please show the exact code that you are using?
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Stephen23
2015-6-23
编辑:Stephen23
2015-6-23
The problem are your NaN's, which you wrote as Nan, not NaN. Character case is important in MATLAB! Here with Nan:
>> AA = [Nan 1 2 3; Nan 4 5 6; Nan 7 8 9; Nan 10 Nan Nan];
Undefined function or variable 'Nan'.
With correct NaN, no error:
>> AA = [NaN 1 2 3; NaN 4 5 6; NaN 7 8 9; NaN 10 NaN NaN];
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Ingrid
2015-6-23
the error that is given has nothing to do with the NaNs in your file but means that the file to were you want to write could not have been opened correctly. This would show as fid01 == -1
are you sure that you have writing permissions to were you want to write the file?
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