Error using ==> fprintf Function is not defined for 'cell' inputs.

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Himanshi Rani 2017-9-20

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https://ww2.mathworks.cn/matlabcentral/answers/357531-error-using-fprintf-function-is-not-defined-for-cell-inputs

评论： Guillaume 2017-9-20

Hi, I am working with Tables as shown :

     count            EndNodes             Weight 
    _____    ________________________    ________
    'R1'     {1x1 cell}    {1x1 cell}     0.31486
    'R2'     {1x1 cell}    {1x1 cell}    0.049458
    'R3'     {1x1 cell}    {1x1 cell}     0.20583
    'R4'     {1x1 cell}    {1x1 cell}     0.42986
    'R5'     {1x1 cell}    {1x1 cell}     0.34631
    'R6'     {1x1 cell}    {1x1 cell}    0.026973

I want to print the table on a notepad. But when I use the fprintf command, there is an error saying 'fprintf Function is not defined for 'cell' inputs.' My version of Matlab is 2016a. Could anyone guide me ?

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Jan 2017-9-20

Of course we must see the command before we can knwo, why it is failing.

Himanshi Rani 2017-9-20

编辑：Himanshi Rani 2017-9-20

在 MATLAB Online 中打开

nrow=size(Table,1)
fid= fopen('OutputFile.txt', 'wt');
for K = 1 : nrow
fprintf(fid, '%-20s %-20s %8f %8f\n', Table{K,1}, Table{K,2},Table{K,3});
end
fclose(fid);

This code has been given to me by Walter Roberson in one of my other questions.

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Answer 1

Guillaume 2017-9-20

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As the error message says, you can't pass cell arrays to sprintf. It doesn't know what to do with them since they can contain anything (and nothing). You would have to extract the content of these cell arrays and path that content to sprintf instead.

As we don't know what is in these cell arrays, we can't tell you how to do that.

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Himanshi Rani 2017-9-20

编辑：Himanshi Rani 2017-9-20

在 MATLAB Online 中打开

I am sorry. This is the correct cell array:

Table.EndNodes{1,2}

ans =

'N15'

It contains the endnodes of line segments.

Guillaume 2017-9-20

在 MATLAB Online 中打开

You don't make it easy to help you by not giving enough information. The exact class/content of the column is required to be able to tell you how to call fprintf.

I'm going to assume that Table.EndPoint is an Nx2 cell array. Each cell containing a 1x1 cell array, and each of these cell array containg a char vector. That's the only configuration that would match your question and your latest comment. However, it does not make much sense as the 1x1 cell arrays had an unnecessary level of indirection that is not needed.

With that assumption in place:

fid = fopen('OutputFile.txt', 'wt');
rowfun(@(count, endnodes, weight) fprintf(fid, '%s %s %s %f\n', count, endnodes{:}, weight), Table, 'NumOutputs', 0, 'ExtractCellContent', true);
fclose(fid);

You will have to adjust the format string according to what you want.

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