Hi FIR,
The error comes because the ismember() function expects either a matrix of numbers or a cell array of strings. Since d is a cell, you provided a cell array of numbers which is unfortunately invalid. Try converting to numbers like the following:
dMask = ismember(cell2mat(d(:,1)), d1);
Secondly, you were trying to concat d1 (which is a 1x2 matrix) with various rows of a cell (ie, an nx2 cell):
out = [d1, d(dMask,:)]
This won't work on two counts:
1. Cells won't concat with matrices - one of them needs to be converted.
2. d1 is 1x2, which won't concat if your result has more than 1 rows.
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So, I've updated my answer as below from the comments you made. Firstly, we have your inputs d and d1 as follows:
d = {12 'A'; 23 'B'; 18 'H'; 12 'P'};
d1 = [23 45;18 10];
And what you actually want to do is concat d1 with its corresponding indices into d. Note that this means you're asking which entries in the first column of d1 are members of the first column of d... Note that this is the opposite ordering from your original question, but it seems more logical. Try the following two lines, I think that they answer your question:
[dMask, indices] = ismember(d1(:,1), cell2mat(d(:,1)));
[num2cell(d1(dMask,:)) d(indices,2)];
Does this help?
