function

I am trying to call another function(add) from within my code but i get the following error. Can any one please help.

a=[1 2 3 4 5 6]
[b]=add(a)% the commands of add actually produces  d

c=a+d

??? Undefined function or variable "d".

[Jan]

You could show us the code of "add" to clarify what "actually produces d" means.

Answer 1

[Sean de Wolski]

No. The command add may produce 'd' in its own function workspace, but when it is retrieved it is called 'b' because that's the variable name you're assigning it to.

Did you want:

d = add(a); ?

Or did you want add to put a d in your workspace?

doc assignin

[God'sSon]

thank you for your answer. Also, how do I use another variable eg; 'f' which is also produced somewhere inside the function before d is produced. ie; I want to use both 'd' and 'f' produced inside [b].

[Sean de Wolski]

function [f d] = add(x)

%do stuff with x to create f and d; e.g.

f = x*pi

d = 11./x

call add with

[f d] = add(a)

or whatever.

doc function for a good description of how they work

[God'sSon]

This works fine. Thank you.