??? Error using ==> horzcat, CAT arguments dimensions are not consistent.

Question

Zach 2012-3-30

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https://ww2.mathworks.cn/matlabcentral/answers/34026-error-using-horzcat-cat-arguments-dimensions-are-not-consistent

I have two cell arrays, both of length n. One array contains nX1 strings, while the other array is contains nx1 type double. I'm trying to create a new variable that is nx2.

The error doesn't seem to make sense to me, since the dimensions of both arrays are identical. This is probably a novice error, so I'll lay out exactly what I've done:

A = {a, b, c, d, ..., n}

B = {1,2,3,4....n}

C = [A,B]

??? Error

If I attempt this:

C = [A;B]

The new variable that is created is (n+1)x1 containing all of the cells in A plus a new cell with text (nx1 double), but lacking any of the values stored within B.

A and B are variables that have been imported using xlsread

If anyone can help me with the problem and shed some light on why exactly this is happening I would greatly appreciate it. Thank you.

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Answer 1

Thomas 2012-3-30

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https://ww2.mathworks.cn/matlabcentral/answers/34026-error-using-horzcat-cat-arguments-dimensions-are-not-consistent#answer_42684

在 MATLAB Online 中打开

you should try

A = {'a', 'b', 'c', 'd'}
B={1,2,3,4}
C=[A,B];
D=[A;B];

Make sure A and B are being declared as cells.

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Zach 2012-3-30

Thanks for the response.

The issue that I have is that I'm not defining A or B.

That is to say, they are being imported using xlsread, so really

A = <n x 1 cell>

and

B = <n X 1 double>

with text and number information as imported from excel. Rewriting the data in A by hand to include '' is tedious, as there are 300+ worksheets that I'm attempting to analyze data from, and n ranges from ~10 to 40, with no consistency.

To be clear, I don't really care about D = [A;B]. I just left it in because MatLab allowed that combination to happen without giving me the error message. I'm assuming that it had something to do with recognizing B = <nx1 double> as a string and simply adding it to the array A = <nX1 cell>, that contains strings.

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