Why i'm getting this error

Question

Mohd Babar 2024-6-13

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2128181-why-i-m-getting-this-error

评论： Mohd Babar 2024-6-14

for i =1:N

fx =[ 'C:\Users\SC23M048-BABARMALIKM\Downloads\Abaqus\Hierarchical composite\aax1\jjx' num2str(i) '.txt'];

fy =[ 'C:\Users\SC23M048-BABARMALIKM\Downloads\Abaqus\Hierarchical composite\aay1\jjy' num2str(i) '.txt'];

fu =[ 'C:\Users\SC23M048-BABARMALIKM\Downloads\Abaqus\Hierarchical composite\aau11\jju1' num2str(i) '.txt'];

fv =[ 'C:\Users\SC23M048-BABARMALIKM\Downloads\Abaqus\Hierarchical composite\aau21\jju2' num2str(i) '.txt'];

x = textfile(fx);

y = textfile(fy);

z1 = textfile(fu);

z2 = textfile(fv);

U1 = griddata(x,y,z1,K1,K2);

U2 = griddata(x,y,z2,K1,K2);

zz1 = U1+zz1;

zz2 = U2+zz2;

i ;

end

Error using fscanf

Invalid file identifier. Use fopen to generate a valid file identifier.

Error in untitled>textfile (line 160)

value= fscanf(fileID,'%f');

this is the error i'm getting

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Ganesh 2024-6-13

I wonder how your files are structured.

In your question your directory is named "aax1" but you have uploaded ".txt" files with the same name. The "code final.txt" does not have any file of the format "aa.." at all.

You can send the folder structure so we could get a better idea of what you need to access.

Mohd Babar 2024-6-14

Final code.mlx

i have atteched the final code live script

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Answer 1

Shivani 2024-6-13

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2128181-why-i-m-getting-this-error#answer_1471381

编辑：Shivani 2024-6-13

在 MATLAB Online 中打开

Hello @Mohd Babar,

The error you're encountering is due to an attempt to read from a file without properly opening it first. In MATLAB, before you can read from a file, you need to open it using fopen, which returns a file identifier. This file identifier is then used with functions like fscanf, fgets, or fread to read from the file. After you're done with the file, it's important to close it using fclose to free up system resources.

You can read about these functions by accessing the following MATLAB documentation link: https://www.mathworks.com/help/matlab/ref/fscanf.html

In the code snippet shared above, you are using 'textfile' as a user-defined function to read the file contents. It is likely that the file identifier in the function is not being opened or closed correctly, leading to this error. The below code snippet shows an example of how the 'textfile()' function can be implemented:

function value = textfile(filename)
    fileID = fopen(filename, 'r');
    if fileID == -1
        
        error('Failed to open file: %s', filename);
        
    end
    value = fscanf(fileID, '%f');
    fclose(fileID);
    
end