Variable ... is undefined on some execution paths
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hello guys!
I hope somebody can advise me with respect the next code, when I run it into embedded editor from simulink embedded block, I have the error that Variable 'mu1' is undefined on some execution paths.
function [u_F,mu12,mu32] = fcn(s,delta)
%#codegen
a = 0.5;
mu12 = 0;
mu32 = 0;
y = 0;
if s <= -a
mu1 = 1;
mu2 = 0;
mu3 = 0;
elseif -a < s && s <= 0
mu1 = -1/a*s;
mu2 = 1/a*(s+a);
mu3 = 0;
elseif s > 0 && a >= s
mu1 = 0;
mu2 = -1/a*(s-a);
mu3 = 1/a*s;
elseif s > a
mu1 = 0;
mu2 = 0;
mu3 = 1;
end
mu12 = mu1;
mu32 = mu3;
y = (mu1*(-delta)+mu2*0+mu3*delta)/(mu1+mu2+mu3);
u_F = y;
采纳的回答
Ryan Livingston
2015-4-27
编辑：Ryan Livingston
2015-4-27
As the error says, there is a possible execution path on which mu1 is not defined. In particular, if all of the conditions in your if and elseif statements are false, then mu1,mu2,mu3 will not be defined.
To resolve this define them to default values either before the if:
mu1 = 0; mu2 = 0; mu3 = 0;
if s<= -1 ...
or add an else branch:
elseif s > a
mu1 = 0;
mu2 = 0;
mu3 = 1;
else
mu1 = 0;
mu2 = 0;
mu3 = 0;
end
3 个评论
Smaghuli
2015-4-27
Ambe Harrison
2022-7-19
Thank you Ryan Livingston your comment was very useful. It just solved a similar problem i encoutered.
Kind regards.
Elisa Micaela Rodriguez Steinbrecher
2022-12-1
Amazing, thanks for your answer
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