beginner question for .m conversion

I am beginner at MATLAB, I need to convert small program from fortran code to m file I succeed to do that except one command i don't know how to conver it in m file. The command is: x=x+1 could you help me?

Answer 1

[Geoff Hayes]

Mohamed - the code to increment a local variable by one would be the same in MATLAB. Just do

 x = x + 1;

[Mohamed Ibrahim]

i did not mean it i need to to make x(n+1)=x(n) +... each time step in simulation.

[Geoff Hayes]

So you have some sort of recurrence relation. If you know how many elements to iterate over, you could do something like

 n = 42;
 x = zeros(n,1);
 x(1) = 2;
 for k=2:n
     x(k) = x(k-1) + somethingElse;
 end

In the above, we size x to be n elements long. We initialize the first element of x to be some random (for this example) number, and then iterate from 2 to the end of x updating each element according to whatever equation you require (this is the somethingElse).