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subtract two data points in a cell array

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Bharat
Bharat 2014-12-5
评论： Bharat 2014-12-5
Hi. I have a cell array Sa (338 X 1929). I want to subtract two points (which are numbers). For example: Sa(i,2)-Sa(i-1,2). Matlab doesn't do that as they are cell array type. Is there any way to do this?
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Image Analyst
Image Analyst 2014-12-5
After you read the FAQ you will know all about cells and won't need to ask a question like this. See http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F I think it gives a good intuitive description for what cells are an how to use them. Then you will understand why the cyclists answer works.

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the cyclist
the cyclist 2014-12-5
You are trying to subtract the cells, rather than the contents of the cells. Try
Sa{i,2}-Sa{i-1,2}

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