How to convert this c code in to matlab.

for s=0:s<n/h -1:s+1

F1 = (X13(s+1) - X13(s))/h;
F2 = (X14(s+1) - X14(s))/h; 
F3 = (X15(s+1) - X15(s))/h;
F4 = (X16(s+1) - X16(s))/h; 

tt = tt + (n/(kkk -1));
end

this is the error i am getting

Undefined function or variable 's'.

Error in test4 (line 479)
for s=0:s<n/h -1:s+1

[Walter Roberson]

You do not appear to have posted the C code to be converted.

Answer 1

[Roger Stafford]

In the first place, the arrays X13, X14, and X16 will have to be changed to start at index 1, not 0. Matlab does not allow an index of 0. Then your code in matlab would be:

for s = 1:1:n/h  % 1:n/h would do just as well
 F1 = (X13(s+1) - X13(s))/h; 
 F2 = (X14(s+1) - X14(s))/h; 
 F3 = (X15(s+1) - X15(s))/h; 
 F4 = (X16(s+1) - X16(s))/h;
 tt = tt + (n/(kkk -1));
end

In matlab this computation of F1 through F4 would be uselss unless you provided some method of storing these results as you go along. (That is also true of C.)

[RAVI MANDAVA]

Thanking you sir