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How to add zeros to the end of cells

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Lexington Stoyell
评论： Walter Roberson 2018-3-6
I am looping through data, which are of various lengths. I want to create a cell that will attach zeros to the end of the cells so there is not a dimension mismatch. How do I go about doing this? How do I do this if the first set of data to loop through is not the largest length?
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Geoff Hayes
Geoff Hayes 2018-3-5
@Jan - I didn't realize you could do that!
Lexington Stoyell
Lexington Stoyell 2018-3-5
How do you then add the zeros on the end?

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回答（1 个）

Walter Roberson
Walter Roberson 2018-3-5
FirstNCols = @(M,n) M(:,1:n);
PadToN = @(M,n) FirstNCols([M, zeros(size(M,1),n)]);
width_needed = max( cellfun(@(M) size(M,2), YourArray) );
PaddedArray = cellfun(@(M) PadToN(M, width_needed), YourArray, 'uniform', 0);
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Lexington Stoyell
Lexington Stoyell 2018-3-6
When implementing this I get the error as follows:
Error using @(M,n)M(:,1:n)
Not enough input arguments.
Error in @(M,n)FirstNCols([M,zeros(size(M,1),n)])
Error in @(M)PadToN(M,width_needed)
Error in limits (line 34)
PaddedArray = cellfun(@(M) PadToN(M, width_needed), YourArray, 'uniform', 0);
Walter Roberson
Walter Roberson 2018-3-6
FirstNCols = @(M,n) M(:,1:n);
PadToN = @(M,n) FirstNCols([M, zeros(size(M,1),n)], n);
width_needed = max( cellfun(@(M) size(M,2), YourArray) );
PaddedArray = cellfun(@(M) PadToN(M, width_needed), YourArray, 'uniform', 0);

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