how to change this error

Undefined function or variable 'water_r'.Error in sc (line 10) meanwater_r=mean(water_r);

[Andrei Bobrov]

Defin your variable water_r.

Answer 1

[KL]

if you're using it inside another function, you have to pass it as an argument.

    function output = yourFunction(bla, bla, water_r)
    ...
    meanwater_r=mean(water_r);
    ...
    end