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something wierd with sinc function

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Kobi
Kobi 2014-11-24
编辑： Matt J 2014-11-24
while using sinc(x) function there is a difference between sinc(x) and sin(x)/x also when i manually calculate its equal to
sinc(1.5)= -0.2 (negative value) sin(1.5)/1.5 = 0.6 (positive value)
why?

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Matt J
Matt J 2014-11-24
编辑：Matt J 2014-11-24
Sounds like you're using a pi-normalized sinc
>> sin(1.5*pi)/(1.5*pi)
ans =
-0.2122
It's a normalization often used so that the roots of the sinc() will be at the integers.

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