Sudden error "Unidentified function or variable"
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Kyle Dalminton
el 26 de Jul. de 2021
Comentada: DGM
el 26 de Jul. de 2021
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
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Respuesta aceptada
DGM
el 26 de Jul. de 2021
Editada: DGM
el 26 de Jul. de 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 comentarios
DGM
el 26 de Jul. de 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.
Más respuestas (1)
Chunru
el 26 de Jul. de 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
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