Just curious why it need the extra <: instead of
x =. (194.18 * 2p1 ) * (i. % ]) 8000
or
x =. (194.18 * 2p1 ) * (%~ i.) 8000
Птн, 15 Июл 2011, Martin Neitzel писал(а):
> mijj> yeh .. i always confuse samples with sample intervals too ..
> mijj> should be ...
> mijj> x =. 1 o. (194.18 * 2p1 ) * (i. % <:) 8000
>
> Should be not. So, once more:
>
> The sample interval here is 1r8000 sec (=8kHz
> sampling). For Ian, the one-second signal is "194.14 sine waves",
> and for direct treatment of "sin(x)" function with 1&o., the "x"
> values ("points where the samples are taken") for the periods have
> to be measured in the radians:
>
> x =. (194.18 * 2p1 ) * (i. % <:) 8000
>
> At every sample point, the sample value ("sample") will be the
> sine value or some scaling thereof:
>
> samples =. ... 1 o. x
>
> Less confused now?
>
> Martin Neitzel
>
> (Before submitting my code last night, I checked a 440 Hz version
> against my tuning fork. You might get one before posting, too.)
> ----------------------------------------------------------------------
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