How can we plot a function with domain involving infinity

2017 4 19
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更新时间：2019 10 5
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How can we plot a function with the domain involving infinity? Suppose I want to plot the following function:
f(y)=(2*pi*y)^(-1/2)*exp(-y/2); y>0
How can I do this in MATLAB?
Thanks

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Andrew Newell
Andrew Newell 2017-4-19

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Of course, you can't plot the whole thing, but you can plot enough so that it's obvious where the curve is going. One approach is to let MATLAB choose the domain for you:
f = @(y) (2*pi*y).^(-1/2).*exp(-y/2);
ezplot(f)

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Jayesh Shimpi
Jayesh Shimpi 2019-10-5

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Infinity symbol used in Matlab for limit to plot the graph

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