What command will erase all but the first three columns of a matrix in MATLAB? -


I'm essentially trying to get the matrix, a , and change it into matrix I have the values ​​in the first three columns of a I just want to sort out a in my first three columns. 

  newMatrix = oldMatrix (:, 1: 3)

It says, "I have a matrix called the old matrix. I want to store a subset of that matrix in a new matrix" and the brackets say what you want. The first colon represents "all the rows" and is a symbol of 1: 3 "column 1 to 3".


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