why this error?
error: Array indices must be positive integers or logical values.
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kw=0.6; L=1; do=0.06; di=0.05; B=330; kins=0.3; I=265; h=10:50;
m=(1/((kw(di)^2/(4*L))*((ln(do/di)/(2*kins))+(1/(h*do)))))^1/2;
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Steven Lord
le 24 Fév 2021
m=(1/((kw(di)^2 ...
There's no such thing as element 0.05 of an array in MATLAB. Perhaps you're missing a multiplication sign there and you want to multiply kw and the square of di?
/(4*L))*((ln(do/di)...
The function in MATLAB to compute the natural logarithm is log not ln.
/(2*kins))+(1/(h*do)))))^1/2;
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