How to find out approximately equal values from two signals in matlab?

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I had Z=XCF(42)
I want to find approximately equal value of Z in ACF(Auto correlation).
how to find it?

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KSSV
KSSV on 1 Feb 2017
Edited: KSSV on 1 Feb 2017
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vinod kumar govindu
vinod kumar govindu on 1 Feb 2017
in that function if values are not equal the result is zero, but i want approximate value
KSSV
KSSV on 1 Feb 2017
When ever values are equal, you will get respective value 1 (logical), with that you can pick the value.

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