calling elements in matrix

31 31 31 31 31 31 31 31 31 31 31 31 31 31 31

42 42 42 42 42 42 42 42 42 42 42 42 42 42 42

21 21 21 21 20 20 20 20 21 21 21 21 20 20 20

19 19 34 34 19 19 34 34 19 19 34 34 19 19 34

6 9 6 9 6 9 6 9 6 9 6 9 6 9 6 9 6

if we have this huge matrix i have to call only this postions [3 4 6 9 ]

can i know how to do this

[Fabio Freschi]

if you want to extract specific elements of a matrix you need the row and the col index. You provided only a vector. Which elements do you want to extract?

Answer 1

[Vinai Datta Thatiparthi]

Hi Sampath!

As Fabio mentioned, you can use both the row and column indices to get values out of a matrix of any size. Else, if you give a vector as the index (like in your question), MATLAB returns the values at the positions mentioned in the vector from the input matrix, but column wise (since column-major is the default in MATLAB).

Hope this helps!