Quick for loop output question?

I have a for loop saying J = 9000000:18000000

....commands.....

Before end I have R(J) = [equation];

R is my output matrix. Keep in mind I am dealing with large numbers.

Instead of starting the first matrix cell with 9 million, it writes 8,999,999 zero-valued cells before getting to what I want. I am kind of fresh to this, so how might I start writing the output at the very first cell with 9,000,000?

[Matt Kindig]

What you are doing really can't be done by Matlab, as it automatically "fills" the missing matrix elements with zeros. Unfortunately, I can't really see a way to get around this.

Answer 1

[Walter Roberson]

R(J-9000000+1) = ....

I write it in that form as part of making the coding clearer:

lowJ = 9000000;
highJ = 18000000;
R = zeros(highJ - lowJ + 1,1);
for K = lowJ : highJ
   R(K = lowJ + 1) = ....
end