How to apply the same function on different rows of a vector?

Hello everyone,

I'm trying to apply a simple function to different rows of a vector 521x1. I want to divide the row 521 for 100 and then do the same for the row 501, 481, 461...basically every 20 rows I need to apply this division. At the end I expect to obtain a vector 26x1.

Could someone help me?

Thank you

Answer 1

[waqas]

If I got the question right, this is how it should work:

andr = randn(521,1) 
andrn = 1/100*andr(521:-20:1) % you can use 1/100.*(andr(521:-20:1,:)) in case there are more columns

The code will give the last value (on 521st row) first as you mentioned in the question.

[Andrea Di Lelio]

It is perfect, thank you very much.

[waqas]

Great. If it does the job then accept the answer :)