Nesting function trouble with undefined variable
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
aldburg
am 19 Nov. 2017
Bearbeitet: Stephen23
am 19 Nov. 2017
Trying to code a simple nesting function and I can't understand why I get an undefined function or variable warning for 'a'
function [Y] = nesty(d,e)
Y(d,e)=2*a;
nestmini
function [a] = nestmini(d,e)
a=d+e;
end
end
0 Kommentare
Akzeptierte Antwort
Walter Roberson
am 19 Nov. 2017
function [Y] = nesty(d,e)
a = nestmini;
Y(d,e)=2*a;
function [a] = nestmini(d,e)
a=d+e;
end
end
Remember, the variable named as output in a function is a dummy variable that is not assigned outside the function
5 Kommentare
Stephen23
am 19 Nov. 2017
Bearbeitet: Stephen23
am 19 Nov. 2017
@aldburg:
- Y=... defines a totally new variable with the name Y. It has the size of whatever the RHS has.
- Y(d,e)=... uses indexing to allocate values into the selected elements of Y. If Y does not exist before that indexing then MATLAB creates Y and fills the unindexed elements with zero.
The introductory tutorials teach these kind of basic MATLAB concepts, such as defining variables and using indexing, and are highly recommended for all beginners:
Weitere Antworten (1)
KL
am 19 Nov. 2017
You're passing d,|e| to nesty function but you're using a on the right hand side of the equation. Do not expect matlab to call the nestmini function for you.
If you want to use the function return directly, try something like,
Y(d,e) = 2*nestmini(d,e);
0 Kommentare
Siehe auch
Kategorien
Mehr zu Matrix Indexing finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!