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Revert "dsp/window: use half offset to exclude flanking zeros"

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This reverts efc4dabf2a

The reason for the reversion is confusion caused between different
approaches for window sizing and ease of use.
This commit is contained in:
Dan Kortschak
2020-09-12 19:18:12 +09:30
parent 1839007961
commit 7dc1a8963b
5 changed files with 127 additions and 131 deletions
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26
dsp/window/window_example_test.go
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@@ -67,16 +67,16 @@ func Example() {
// freq=0.4500 cycles/period, magnitude=0.0707, phase=-1.7279
// freq=0.5000 cycles/period, magnitude=0.0000, phase=0.0000
// Hamming window:
// freq=0.0000 cycles/period, magnitude=0.0506, phase=0.0000
// freq=0.0500 cycles/period, magnitude=0.5386, phase=-2.9845
// freq=0.1000 cycles/period, magnitude=7.3350, phase=0.3142
// freq=0.1500 cycles/period, magnitude=8.9523, phase=-2.6704
// freq=0.2000 cycles/period, magnitude=1.7979, phase=0.6283
// freq=0.2500 cycles/period, magnitude=0.0957, phase=0.7854
// freq=0.3000 cycles/period, magnitude=0.0050, phase=-2.1991
// freq=0.3500 cycles/period, magnitude=0.0158, phase=-2.0420
// freq=0.4000 cycles/period, magnitude=0.0125, phase=-1.8850
// freq=0.4500 cycles/period, magnitude=0.0065, phase=-1.7279
// freq=0.0000 cycles/period, magnitude=0.0218, phase=3.1416
// freq=0.0500 cycles/period, magnitude=0.8022, phase=-2.9845
// freq=0.1000 cycles/period, magnitude=7.1723, phase=0.3142
// freq=0.1500 cycles/period, magnitude=8.6285, phase=-2.6704
// freq=0.2000 cycles/period, magnitude=2.0420, phase=0.6283
// freq=0.2500 cycles/period, magnitude=0.0702, phase=0.7854
// freq=0.3000 cycles/period, magnitude=0.0217, phase=-2.1991
// freq=0.3500 cycles/period, magnitude=0.0259, phase=-2.0420
// freq=0.4000 cycles/period, magnitude=0.0184, phase=-1.8850
// freq=0.4500 cycles/period, magnitude=0.0092, phase=-1.7279
// freq=0.5000 cycles/period, magnitude=0.0000, phase=0.0000
}
@@ -100,8 +100,8 @@ func ExampleHamming() {
// Output:
//
// src: [1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000]
// srcCpy: [0.092577 0.136714 0.220669 0.336222 0.472063 0.614894 0.750735 0.866288 0.950242 0.994379 0.994379 0.950242 0.866288 0.750735 0.614894 0.472063 0.336222 0.220669 0.136714 0.092577]
// dst: [0.092577 0.136714 0.220669 0.336222 0.472063 0.614894 0.750735 0.866288 0.950242 0.994379 0.994379 0.950242 0.866288 0.750735 0.614894 0.472063 0.336222 0.220669 0.136714 0.092577]
// srcCpy: [0.086957 0.111692 0.183218 0.293785 0.431409 0.581178 0.726861 0.852672 0.944977 0.993774 0.993774 0.944977 0.852672 0.726861 0.581178 0.431409 0.293785 0.183218 0.111692 0.086957]
// dst: [0.086957 0.111692 0.183218 0.293785 0.431409 0.581178 0.726861 0.852672 0.944977 0.993774 0.993774 0.944977 0.852672 0.726861 0.581178 0.431409 0.293785 0.183218 0.111692 0.086957]
}
func ExampleValues() {
@@ -116,5 +116,5 @@ func ExampleValues() {
// Output:
//
// dst: [0.078459 0.233445 0.382683 0.522499 0.649448 0.760406 0.852640 0.923880 0.972370 0.996917 0.996917 0.972370 0.923880 0.852640 0.760406 0.649448 0.522499 0.382683 0.233445 0.078459]
// dst: [0.000000 0.164595 0.324699 0.475947 0.614213 0.735724 0.837166 0.915773 0.969400 0.996584 0.996584 0.969400 0.915773 0.837166 0.735724 0.614213 0.475947 0.324699 0.164595 0.000000]
}