Error using == Matrix dimensions must agree.

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Aiman Zara
Aiman Zara 2023-4-10
评论： Ran Yang 2023-4-10
using this code to find the location of each element in the matrix
fn = 'FinalBookExcel.csv';
data = readmatrix(fn); % read the numeric matrix
lookupValue = 'Alternaria Leafspot'; % for example, find the location of all elements with value Alternaria Leafspot
[r, c] = find(data==lookupValue); % return row and column indices
But the following error appear after running this code
Error using ==
Matrix dimensions must agree.
Error in CSV (line 25)
[r, c] = find(data==lookupValue); % return row and column indices
Help me resolve this issue

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回答（1 个）

Ran Yang
Ran Yang 2023-4-10
Use ismember instead of == .
[r, c] = find(ismember(data, lookupValue));
  2 个评论
Aiman Zara
Aiman Zara 2023-4-10
@Ran Yang used this but it didnot give me any output( resulted blank)
Ran Yang
Ran Yang 2023-4-10
Are you sure that your csv includes the exact phrase you're looking for?
Are you sure that it was imported correctly into Matlab? If you think you have text but only imported NaNs, see this answer to import as char and not numeric.

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