Sudden error "Unidentified function or variable"
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hello everyone
I've got a problem when trying to run a code today. While the code ran perfectly yesterday, it only showed "Unidentified function or variable" today. Can anybody help me with this? Thank you very much.
My code:
[X1 Y1] = Elispe(1, sqrt(4/3), 0, 0, 0, 2*pi);
Z1 = zeros(1, length(X));
Z2 = ones(1, length(X));
X = [X1;X1];
Y = [Y1;Y1];
Z = [Z1;Z2];
%figure
Purple = [0.5,0,1]
surface(X,Y,Z, 'EdgeColor',Purple);
function [X Y] = Elispe(r1,r2, h, k, a, b)
t = linspace(a, b, 50);
X = r1*cos(t) + h;
Y = r2*sin(t) + k;
end
0 Kommentare
Akzeptierte Antwort
DGM
am 26 Jul. 2021
Bearbeitet: DGM
am 26 Jul. 2021
Did you read what the error message said?
Unrecognized function or variable 'X'.
Error in untitled (line 3)
Z1 = zeros(1, length(X));
So what is X? Is it X1?
Z1 = zeros(1, length(X1));
Z2 = ones(1, length(X1));
I imagine the only reason this once worked was because there was a volatile copy of X just floating around in the workspace -- probably left over from when you changed variable names or something.
2 Kommentare
DGM
am 26 Jul. 2021
It happens. When building stuff in a sandbox, it's helpful to run clearvars at least every now and then to make sure your code isn't relying on ephemeral variables that aren't being set by the current version of the code. If things are going to break, it's best they break while you still have your eyes and mind on it.
Weitere Antworten (1)
Chunru
am 26 Jul. 2021
[X1 Y1] = Elispe(1, sqrt(4/3), 0, 0, 0, 2*pi);
% Z1 = zeros(1, length(X));
Z1 = zeros(1, length(X1));
%Z2 = ones(1, length(X));
Z2 = ones(1, length(X1));
X = [X1;X1];
Y = [Y1;Y1];
Z = [Z1;Z2];
%figure
Purple = [0.5,0,1]
surface(X,Y,Z, 'EdgeColor',Purple);
function [X Y] = Elispe(r1,r2, h, k, a, b)
t = linspace(a, b, 50);
X = r1*cos(t) + h;
Y = r2*sin(t) + k;
end
Siehe auch
Kategorien
Mehr zu Environment and Settings 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!