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global m = 1; function p = h() m end h()

I'm trying to run this script, but I get this error:

'm' undefined near line 4 column 3

Say me please, how I can use the variable from functions?

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  • 1
    Please read the documentation. This addressed exactly in one of the very first examples. Commented Dec 10, 2014 at 19:53
  • possible duplicate of Declaring a global variable in MATLAB -this is a Matlab-tagged question, but the solution is identical for Octave. Commented Dec 10, 2014 at 19:54

1 Answer 1

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You have to declare the var also global inside the function as described here: https://www.gnu.org/software/octave/doc/interpreter/Global-Variables.html

global m = 1; function p = h() global m; m endfunction h()
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2 Comments

How to change the global variable from the function then?
like you would change any other var: assign a new value to it. What have you tried so far?

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