Re: [Discuss-gnuradio] Moving average

On 1/22/19 4:59 AM, david vanhorn wrote:
> Nope.
>
> 1/Averaging evaluates to zero.
> 1/Averaging. (trailing period) does not evaluate, either in the Moving
> Average parameters, or as a separate variable.

You can't put a "." after a variable.

Use

1/float(Averaging)

or

1./Averaging

-- Cinaed

>
>
> On Mon, Jan 21, 2019 at 11:00 PM Cinaed Simson <cinaed.simson@gmail.com
> <mailto:cinaed.simson@gmail.com>> wrote:
>
> 1/5 is zero using integer division in python.
>
> Try using float division
>
>  1/4000.
>  1/5.
>
> -- Cinaed
>
>
> On 1/21/19 4:41 PM, david vanhorn wrote:
> > The docs say that I need to set Scale to the inverse of the Length.
> > Ok, I interpret that as Length = 4000 and Scale = 1/4000
> > The docs here:
> >
> https://www.gnuradio.org/doc/doxygen/classgr_1_1blocks_1_1moving__average__ff.html
> > says that Scale is a float.
> >
> > The discussion here clearly shows Scale working for values <1 and >0
> >
> https://lists.gnu.org/archive/html/discuss-gnuradio/2016-01/msg00084.html
> >
> > If I enter a scale value by hand, like 0.2, then I see 200m which is
> > what I expect.
> > If I enter a scale value as (1/5) then I see 0.
> > If I set a variable called "Scale" = (1/) and enter "Scale" in the
> Scale
> > field of the moving average, it evaluates to 0.
> >
> >
> > When I enter the values in the block, it looks like scale is an int,
> > which makes 1/4000 or indeed 1/(>1) problematic in that it always
> > evaluates to zero, which kinda breaks things.
> > When I enter 1/2 I get "0"
> >
> > When I hover over the field to enter Scale, I get Type Real.
> >
> > I have the input and output of my integrator connected to a QT GUI
> Time
> > Sink, and while the input waveform is what I expect, if I have any <1
> > Scale parameter, the output is 0.
> >
> >
> > Is something broken here, or is it me?
> > I've not had any problems using simple math in any of the other fields
> > where appropriate.
> >
> >
> > --
> > K1FZY (WA4TPW) SK  9/29/37-4/13/15
> >
> > _______________________________________________
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> > Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org>
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >
>
>
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>
> --
> K1FZY (WA4TPW) SK  9/29/37-4/13/15

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