Error using the integral function - A and B must be floating-point scalars.

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cmilk 2015-11-4

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https://ww2.mathworks.cn/matlabcentral/answers/252616-error-using-the-integral-function-a-and-b-must-be-floating-point-scalars

评论： Star Strider 2015-11-4

采纳的回答： Adam Barber

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Star Strider 2015-11-4

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The original (now deleted) post included this code:

Ginf = 4.0;
t = [0:500]
t1 = 100;
t2 = 500;
y1 = @(t) t/t1;
y2 = @(t) t/t2;
fun1 = @(y)exp(-y)./y;
Eiy1 = integral(@(t)fun1(y1(t)), 0, Inf);
Eiy2 = integral(@(t)fun1(y2(t)), 0, Inf);
E21(y1) = integral((Eiy1)./y, Inf, y1)
E21(y1) = integral((Eiy2)./y, Inf, y2)
G(t) = Ginf -[Eiy1*log(t/y1)-E21(y1)]+[Eiy2*log(t/y2)-E21(y2)]
plot(G(t), t)