Subtracting within only 1 dimension of a multidimensional array

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

Answer 1

[Matt J]

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;

[Matt J]

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,[]) );

[Kate]

Thanks a bunch.