how to add different values to some particular rows and columns?

Hello..

  a = [0 10 20 30 40;6 10 20 30 40;12 10 20 30 40;18 10 20 30 40;24 10 20 30 40];

and if i want to add 1 to row no. 1, add 2 to row no. 2, add 3 to row no.3 and so on....but excluding column no. 1 i.e i don't want to add any value in column no.

The output which i am expecting is :

  b = [0 10 20 30 40;6 11 21 31 41;12 12 22 32 42;18 13 23 33 43;24 14 24 34 44]

Answer 1

[madhan ravi]

Since 2016b:

 b=a;
 b(2:end,2:end)=b(2:end,2:end)+(1:size(b,1)-1).'

Prior to 2016b:

 b=a;
 b(2:end,2:end)=bsxfun(@plus,b(2:end,2:end),(1:size(b,1)-1).' )

[Sonia Goyal]

Thanks a lot....it worked

if i want to do tha same using loop then how will it be??

Actually i have to do the same for the matrix with large dimensions.

[madhan ravi]

You don't need a loop for this unless if it's your homework, is it so?

[Sonia Goyal]

yeah....you are right. I dont need a loop

Thanks