Unrecognized function or variable in live script

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Jaafar Rammal
Jaafar Rammal 2021-5-8
评论： David Fletcher 2021-5-8
I am running the following simple live script in Matlab Online:
a = 1
b(2)
function out = b(o)
out = a + o;
end
and I get the following error:
I am not sure how to make the function b use the variable a in this scenario. One of my postulations was that this is only a Matlab Online issue, but I can't verify this. I also tried using global a but it did not work.

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采纳的回答

David Fletcher
David Fletcher 2021-5-8
Variables are local to functions. The only (well strictly speaking not the only) way to get them into a function is to pass them in as an argument, and the only way to get them out is to pass them out. In this case you are passing 'o' into the function as an argument, so it is available - a is not being passed into the function so the function can't access it. You would either have to define a inside the function, or pass it into the function as an argument in the same way as you are passing o into the function.
  2 个评论
David Fletcher
David Fletcher 2021-5-8
Global would work by the way, but you have to also define the global inside the function. I personally would advise against using global variables though

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更多回答（1 个）

Walter Roberson
Walter Roberson 2021-5-8
driver
function driver
a = 1
b(2)
function out = b(o)
out = a + o;
end
end
Shared variables require nested functions.
  1 个评论
Jaafar Rammal
Jaafar Rammal 2021-5-8
WORKS AS WELL
Thanks for the answer, neat trick and it works! (unfortunately I can only mark one answer as valid)

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