About the expression to the left of the equals sign is not a valid target for...

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zeynelabidin sevgili 2017-4-27

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/337593-about-the-expression-to-the-left-of-the-equals-sign-is-not-a-valid-target-for

编辑： Stephen23 2017-4-27

Hi,

Try this function to sum two vectors. But when i send parameters it didnt work with an error message(About the expression to the left of the equals sign is not a valid target for...)

This is my function:

if true
  % 
function [y, n] = sig_mult(k1, n1, k2, n2)
n = min(min(n1), min(n2)):max(max(n1), max(n2)); 
y1 = zeros(1, length(n));
y2 = y1;
y1 = ((find(n>=min(n1)) & (n<=max(n1)) == 1)) = k1;
y2 = ((find(n>=min(n2)) & (n<=max(n2)) == 1)) = k2;
y = y1.*y2;
end

And this is my parameters to output two signals:

if true
  % >> n1 = -2:10;
n2 = 1:14;
x1 = rand(size(n1));
x2 = rand(size(n2));
stem(n1,x1,'k');
stem(n2,x2,'r');
[x3,n3] = sigadd(x1,n1,x2,n2);
Error: File: sigadd.m Line: 7 Column: 47
The expression to the left of the equals sign is not a valid target for an
assignment. 
end