Double to cell conversion difficulties

Question

Joe 2012-1-26

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https://ww2.mathworks.cn/matlabcentral/answers/27142-double-to-cell-conversion-difficulties

I have a cell array called temp which stores two columns of dates. Each date is currently stored as a char string (eg: 28/12/2808) within a cell. I'd like to convert these to datenumbers for plotting and sorting.However, when I do this:

temp(:,1)=datenum(temp(:,1),'dd/mm/yy');

I get:

"Conversion to cell from double is not possible."

I've tried drinking several cups of coffee but that hasn't helped either. I assume I am missing { } somewhere but I just can't figure out where. num2cell seems to work but it's not very elegant.

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Answer 1

Bård Skaflestad 2012-1-26

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There is a slight misunderstanding in the way you use datenum. Specifically, datenum(temp(:,1),'dd/mm/yy') returns a double for each element in the cell array temp(:,1). However, you cannot directly assign individual double|s to the corresponding element of |temp(:,1).

One way to achieve the (presumably) desired effect is to use the num2cell function like

temp(:,1) = num2cell(datenum(temp(:,1), 'dd/mm/yy'))

but there may be other techniques that solve the larger problem you're trying to solve more directly.