Subtracting within only 1 dimension of a multidimensional array

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Kate
Kate 2013-7-8
Question: I have a gridded array. Example:
airMetGrid <90x180x40542> single
but my air temp is in kelvin, so I need to subtract 273.15 from ONLY the 3rd dimension (and not mess up my grid). How do I do this? It seems simple but I can't wrap my brain around it today.
Thanks

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Matt J
Matt J 2013-7-8
编辑：Matt J 2013-7-8
Since 273.15 is a scalar, there is no apparent difference between subtracting it from the 3rd dimension and subtracting it from the entire array.
inCelsius = airMetGrid-273.15;
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Matt J
Matt J 2013-7-8
编辑：Matt J 2013-7-8
Conversely, if you have a length-40542 vector, v, and want to subtract it from every airMetGrid(i,j,:), you could do
newdata=bsxfun(@minus, airMetGrid, reshape(v,1,1,[]) );

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