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

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sama h
sama h 2014-1-10
评论： Youssef Khmou 2014-1-10
how can write sigma in a formool in matlab

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回答（2 个）

A Jenkins
A Jenkins 2014-1-10
编辑：A Jenkins 2014-1-10
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.)
Youssef Khmou
Youssef Khmou 2014-1-10
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
...
  2 个评论
Image Analyst
Image Analyst 2014-1-10
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.

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