sinc function

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Lily
Lily 2011-4-15
At y=0, the graph is not plotted. How would I plot it, to compare to the sinc(x) function. Thanks in advanced.
x=-20:0.1:20;
y=(sin(pi*x))/(pi*x);
if x=0
.....
end
plot(x,y,);
hold on
plot (x,sinc(x),'*');

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采纳的回答

Matt Fig
Matt Fig 2011-4-15
x = -20:0.0001:20;
y = (sin(pi*x))./(pi*x);
y(x==0) = 1;% If you don't get: (Warning: Divide by zero.) you missed 0.
plot(x,y)

更多回答（1 个）

Walter Roberson
Walter Roberson 2011-4-15
The value is undefined at that location. What are you hoping to have plotted there?

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