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

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John wick
John wick am 11 Aug. 2019
Kommentiert: John wick am 11 Aug. 2019
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)

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Star Strider
Star Strider am 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 Kommentare
John wick
John wick am 11 Aug. 2019
Ohhh Thank you very much for helping and explaining it. Love ya!
Star Strider
Star Strider am 11 Aug. 2019
As always, my pleasure!

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Weitere Antworten (1)

Image Analyst
Image Analyst am 11 Aug. 2019
Bearbeitet: Image Analyst am 11 Aug. 2019
You need to put the matrix name in there, and a result variables, like
result = m(:,44) - .....................
etc.
  3 Kommentare
Image Analyst
Image Analyst am 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 am 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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