How do you have an unlimited number of variables in your matrix when doing the secant method?

I'm using the secant method to calculate a variable on Matlab and the matrix I'm importing has 43 columns. I've created a zero vector to output my values in using the code: 'tm=zeros(1,43); and then I've told the code to proceed for the 43 corresponding values that are in my matrix using the code: 'for i=(1:43)'. However, I want to make it so that I have an undefined number of columns, rather than 43, just incase I added more data to the matrix I imported.

Thanks.

Answer 1

[John D'Errico]

So why not check the size of the matrix, then use a loop of length based on that size? Any of these tools will give you what you want.

help numel
help size
help length