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How to multiply elements of a matrix by a number

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Rawan hamdi
Rawan hamdi 2013-4-8
评论： Image Analyst 2022-7-3
Hi, I'm having a matrix of size X= [280,307,191] and i want to restore the matrix such that the 3rd dimension of the matrix is multiplied by '12'
Thank you
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Rawan hamdi
Rawan hamdi 2013-4-8
I have an image X of size 280x307x191 and i got the gradient to be A = gradient X (:,:,:) what i need to do is to multiply the gradient of the z dimension of the image by a constant eg. '12'

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回答（2 个）

Image Analyst
Image Analyst 2013-4-8
You misunderstood the discussion in your prior question. Anyway, to do what you're asking for here (which is not what you really want):
A = 12 * A;
Why? Because, of course, every voxel has a Z value. I bet you're confused now, so better go back to your prior question and figure out what you really want to do.
rimsha fazal
rimsha fazal 2022-7-3
Hi I have a case to multiply 2 by 2 matrix with a variable of 50000 elements. how can i do this?
w.*[Cm] it doesn't work.

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