How to put the values into the specific location?

Question

Isti 2012-5-3

I have a list of location like this:

location =

From above, it describes thatt the location is (1,2),(1,4),(2,3),and (4,2)

Then i have a values like this:

Values =

I want to put the values into the location above. So the result of matrix A is like this:

A =

  55     4    22
   7    99     5 
   1     2     5   
  11     4     2

What to do?

Thanks before :')

Answer 1

Andrei Bobrov 2012-5-3

A = zeros(4);
location =[...
1     2
1     4
2     3
4     2];
Values =[...
55
22
99
11];
A(sub2ind(size(A),location(:,1),location(:,2))) = Values;

OR:

A(bsxfun(@minus,location,[0 1])*[1;size(A,1)]) = Values;

Isti 2012-5-3

thanks :)

anyway what's the difference between sub2ind and bsxfun function?

Andrei Bobrov 2012-5-3

please read about functions:

sub2ind - http://www.mathworks.com/help/techdoc/ref/sub2ind.html;

bsxfun - http://www.mathworks.com/help/techdoc/ref/bsxfun.html.