Error: Array indices must be positive integers or logical values.

2019 10 8
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更新时间：2019 10 8
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I have looked at past threads and cannot find the issue of my problem. The error is in the last line with description "Array indices must be positive integers or logical values"
q=10; % W/m^3
km=100; %W/Km
kw=500; %W/Km
R1=1;
R2=1.2;
N=5;
Tr=300;
dr=R1/(N+1);
M=zeros(N+N,N+N);
M(N+1,N+1)=-km/((N+1)*dr^2)-kw((N+1)*dr^2);

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Stephan
Stephan 2019-10-8
编辑：Stephan 2019-10-8

0 个投票

the expression
kw((N+1)*dr^2)
is the problem. I suspect a missing * or / - for example:
kw*((N+1)*dr^2)

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