Subtracting in matrix, column to column (Basic MatLab)?

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Given a 45×48 matrix, type a single command that subtracts column 36 from column 44
i answered this but it pops up as Error: Invalid use of operator. Is there something wrong or should it be in different type of form.
(:,36)-(:,44)

Accepted Answer

Star Strider
Star Strider on 11 Aug 2019
Your idea is essentially correct. I have no idea what the question wants.
Perhaps providing a matrix and a reference to it will work:
A = rand(45,48);
col_dif = A(:,36)-A(:,44)
  6 Comments
John wick
John wick on 11 Aug 2019
Ohhh Thank you very much for helping and explaining it. Love ya!

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More Answers (1)

Image Analyst
Image Analyst on 11 Aug 2019
Edited: Image Analyst on 11 Aug 2019
You need to put the matrix name in there, and a result variables, like
result = m(:,44) - .....................
etc.
  3 Comments
Image Analyst
Image Analyst on 11 Aug 2019
Well you can't just have indexes within parentheses like (:,44), because how could MATLAB possibly know which matrix you're referring to.
John wick
John wick on 11 Aug 2019
I guess i just got the idea on how it works but not really master it. Thank you for helping me out!

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