Forming matrix with string

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Sang Heon Lee
Sang Heon Lee 2017-9-23
回答： Walter Roberson 2017-9-24

How can I make function that forms a matrix with string? If string is 'idk' and number is 3 the output should be sth like this [idk,idk,idk;idk,idk,idk;idk,idk,idk], matrix of 'idk' with 3 rows and colums.

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回答（2 个）

Image Analyst
Image Analyst 2017-9-24
编辑：Image Analyst 2017-9-24
% Make the 9 strings into a cell array:
ca = {'idk','idk','idk';'idk','idk','idk';'idk','idk','idk'}
You'll see:
ca =
3×3 cell array
{'idk'} {'idk'} {'idk'}
{'idk'} {'idk'} {'idk'}
{'idk'} {'idk'} {'idk'}
If the 3 is really a variable, and you want an actual function instead of a single line of code, then you can do it like this, using repmat():
function ca = MakeCellArray(numRows)
% Make the 9 strings into a cell array:
oneCell = {'idk'}; % Make just one for a start.
% Turn it into a 3x3 array of cells
ca = repmat(oneCell, [numRows, numRows])
Walter Roberson
Walter Roberson 2017-9-24
function result = YourFunction
result = repmat(string('ijk'), 3, 3);
This requires R2016b or later.

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