getting a return value from a function in MATLAB

Question

I have such a matlab function:

function j = globalfun(a, xr, x)

        gv_0 = 0;
        gv_1 = 0;

        counter1_0 = 0;
        counter1_1 = 0;
        counter2_0 = 0;
        counter2_1 = 0;
        counter3_0 = 0;
        counter3_1 = 0;
        counter4_0 = 0;
        counter4_1 = 0;
        ............................................
        ............................................
        score = gv_0/gv_1;
end

I haven't written all the function codes, because it is not needed.

The question is, I need to get "score" value from another script I'm using.

How can I manage the issue?

Thanks,

What is a score value? Or if you want to return the value "score" from the function? — arc_lupus
– arc_lupus, Commented Mar 8, 2015 at 14:58
If you need score somewhere else, return it: function [j,score] = globalfun(a, xr, x) — Daniel
– Daniel, Commented Mar 8, 2015 at 15:00
So, do you want to return the value "score" from your function? — arc_lupus
– arc_lupus, Commented Mar 8, 2015 at 15:00
yes, exactly. When I run the code, I get the error "too many input arguments." — yusuf
– yusuf, Commented Mar 8, 2015 at 15:01

Sébastien Dawans · Accepted Answer · 2015-03-08 15:05:56Z

2

I assume you copy-pasted the function syntax from somewhere and that you don't need to return j. Define this function in globalfun.m

function score = globalfun(a, xr, x)
    ...
    score = gv_0/gv_1;
end

The value of score is assigned within globalfun and will be set as return value. Then call it from a script or another function

myscore = globalfun(a, xr, x)

If you need multiple return values, use square brackets

function [i,j,score] = globalfun(a, xr, x)
    ...
    i = ...
    j = ...
    score = gv_0/gv_1;
end

answered Mar 8, 2015 at 15:05

Sébastien Dawans

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