operations research mathematical formulation

Please help me solve the error.

[Steven Lord]

What do you intend for that line to do? What do you want r and n to be after that line finishes its execution? Please explain with words not code if possible.

There are a couple potential ways that line could be corrected and knowing the intent will help determine which correction is the right one.

[KSSV]

The call of the function meshgrid is not correct. You read the doc.

Answer 1

[Walter Roberson]

[r, n] = meshgrid(0:1, 0:3000:60000);