Matrix in a matrix..............

In matlab:

x =

     1     3     6
     8     3     6
     1     9     0

y =

     5     4     6
     7     9     4
     2     6     4

Z=x(y)

Z =

     3     3     9
     6     0     3
     8     9     3

How can i find Z manually..........

[Walter Roberson]

please read the guide to tags and retag this question. see http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags

Answer 1

[Walter Roberson]

x is an array with 9 elements. y is a matrix of indices each in the range 1 to 9.

y(1) is 5, so the first output of x(y) is x(y(1)) which is x(5), the fifth element of x. Array elements are numbered down columns

1 4 7
2 5 8
3 6 9