How to subtract each column of a matrix by the respective median of that column?

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Emerson De Souza 2011-3-28

评论： Yonghun Jeong 2015-7-14

I want to subtract each column of a matrix by its median.

For example, for the matrix:

l=(4x3)

1 5 9

2 6 10

3 7 11

4 8 12

the median of each column is

2.5000 6.5000 10.5000

Thus, matrix minus its median "l-m" equals:

-1.5 -1.5 -1.5

-0.5 -0.5 -0.5

0.5 0.5 0.5

1.5 1.5 1.5

I would appreciate if someone could tell me how to

write this command in Matlab.

Thank you

Emerson

Matt Fig 2011-3-28

I_minus_med = bsxfun(@minus,I,median(I))

Zoltan 2012-4-17

Thank Matt! A very cool function, I was looking for this for years.

Yonghun Jeong 2015-7-14

Thank Matt Fig! I can do easily by your help.

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