MATLAB Answers

Multiple functions working together?

1 view (last 30 days)
here is my code in a script coding window:
function [n] = n(x)
syms q
[n]=(q^(x/2)-q^(-x/2))/(q^(1/2)-q^(-1/2));
end
function d=d(x)
d=n(x+1)
end
I then save this and go to the command window and type in d(3), which I would like the output to be equal to n(4), but instead I get this:
Index exceeds the number of array elements (1).
Error in sym/subsref (line 870)
R_tilde = builtin('subsref',L_tilde,Idx);
What the heck is going on!!? I'm new to this, help appreciated!

Accepted Answer

Star Strider
Star Strider on 24 Sep 2020
MATLAB is interpreting:
d(3)
as indexing into the third element of ‘d’.
Run:
which d -all
from a script or your Command Window to see if MATLAB can locate the ‘d’ function in the search path (preferably on your user path).

More Answers (1)

David Hill
David Hill on 24 Sep 2020
syms q
n=@(x)(q^(x/2)-q^(-x/2))/(q^(1/2)-q^(-1/2));
d=@(x)n(x+1);
  1 Comment
Michael Vaughan
Michael Vaughan on 24 Sep 2020
what does the (x) do after the @ symbol???? Is it necessary? I seem to be giving functions handles without including that and it works fine

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by