Assigning multiple values to a matrix at locations specified by an array of indices?

Consider that i have the following matrix:

my_mat = zeros(10,10);

To this matrix, I need to assign values (specified by variable "val") at specific locations defined by two arrays "x" and "y".

val = [98 99 100]; x = [1:3]'; y = [4:6]';

I need the following:

my_mat(1,4) = 98;

my_mat(2,5) = 99;

my_mat(3,6) = 100;

Trying to do the following (without using a loop) gives me matrix dimension error (left side 3x3 and right side 3x1):

my_mat(x,y) = val;

Is there anyway I could do this operation?

Answer 1

[KSSV]

Read about sub2ind. This should be used for your case.

val = [98 99 100] ; 
idx = sub2ind(size(my_mat),x,y) ; 
my_mat(idx) = val ; 

[Tintumon]

It works. Thank you.