Make calculations based on previous results

Hi all,

I have an array of 48x365, I need to make some calculations with the first column and use some of the results to do similar calculations with the second column. then the results of the second to do calculations with the 3rd and so on..

do you have any ideas how to do it without using simulink?

thanksa lot

Answer 1

[John D'Errico]

A loop seems trivial and obvious, even though you give no indication of what computations you need to do. If you don't have any idea how to write a loop, then you need to spend some time reading the getting started tutorials. At the very least, read the help about for.

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You DO want to preallocate the array to be 48x365 in advance, else your next anguished question will be "Why is my code so slow?"

[Nikolas Spiliopoulos]

thanks for the answer, I have used for loops before. The question is if I have an extra value calculated, how can I use this value to do some calculations a bit different with second column and so on. the calculations are bit complicated and i think there is no point giving more details

[John D'Errico]

You don't say what is "different". Obviously, you know what the computation is, so clearly you can write the code, or at least it can be written. But if there is no point in giving details, then how can I answer you?

You have a computation that depends on some parameter, as well as the previous column. That it is in a loop is not relevant. You can always access the previous column, as a function of the loop index.

[Nikolas Spiliopoulos]

ok i will give it a try, thanks anyway!