error in fopen when use dlmread

file1 = dlmread('Matched_TNG20100518CISI_N.txt','', 5, 0) fid = fopen(file1, 'r') Axcel1=fscanf(file1,'%g %g %g %g %g\n',[4,Inf])';

Error using fopen File identifier must be an integer-valued scalar of type double.

Any one can help me?

Answer 1

[Star Strider]

Simply use the one line:

file1 = dlmread('Matched_TNG20100518CISI_N.txt','', 5, 0);

Then, check to see what ‘file1’ contains. It should be a matrix of numeric data that you can access directly.

[Skydriver]

This is my contain of file Time Series matched accelerogram: Tng20100518CISI_N.txt

Time Step: 0.01 s

     Time(sec)          Acc(g)      Vel(m/sec)          Dsp(m)  
       0.00000         0.00000         0.00000         0.00000  
       0.01000        -0.00000        -0.00000        -0.00000  
       0.02000        -0.00000        -0.00000        -0.00000  
       0.03000         0.00000        -0.00000        -0.00000  
       0.04000        -0.00000         0.00000        -0.00000  
       0.05000        -0.00000        -0.00000        -0.00000  
       0.06000        -0.00000        -0.00000        -0.00000  
       0.07000         0.00000        -0.00000        -0.00000  
       0.08000         0.00000        -0.00000        -0.00000  
       0.09000        -0.00000        -0.00000        -0.00000  
       0.10000        -0.00000        -0.00000        -0.00000  
       0.11000         0.00000        -0.00000        -0.00000  
       0.12000         0.00000        -0.00000        -0.00000  
       0.13000        -0.00000        -0.00000        -0.00000  
       0.14000         0.00000        -0.00000        -0.00000  
       0.15000         0.00000        -0.00000        -0.00000  
       0.16000        -0.00000        -0.00000        -0.00000  
       0.17000        -0.00000        -0.00000        -0.00000  
       0.18000        -0.00000        -0.00000        -0.00000  
But the answer is the same : Error using fopen
File identifier must be an integer-valued scalar of type double.

[Star Strider]

Do not use fopen.

The dlmread function reads your file. You do not have to do anything else. You can now use the numeric rows of your matrix in your calculations. You do not have to do anything else to your file after you have imported it with dlmread.

[Skydriver]

Okay, thx, It's done

[Star Strider]

My pleasure.

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