how can write sigma in matlab???????

how can write sigma in a formool in matlab

[Azzi Abdelmalek]

What does that mean?

Answer 1

[A Jenkins]

If you are saying you want to put sigma, the greek letter σ, as a variable in a formula, you cannot. You must use english letters and numbers.

sig=3;
alp=5*sig;

(I wouldn't use the variable name sigma, because that is also a function.)

[sama h]

no I want to sum many number with

Answer 2

[Youssef Khmou]

You have specify your question, sum as letter, symbolic , numeric??

 1.sum(X), % sums the elements of the vector
 2.sum(sum(X)) % sums the elements of matrix
 3.for n=1...S=S+quantity % summation in loop
...

[Image Analyst]

Or maybe even the symbol sigma in a title or xlabel or ylabel or some other string on the GUI. Another way to sum all the elements is sum(X(:)) which works for X of any dimension.

[Youssef Khmou]

Correct .