I get the same result; What this is supposed to look like is attached. I
needed some parens to get it to parse properly. i had the wrong idea about
how to package the data for plot because the example I was following was
boxing/unboxing which I mistakenly thought I needed to do and so got
wrapped around the axle on data packaging. The correct command is:
'key exp(-x/10),Y' plot (0 {"1 (50 1$^((-i.50)%10))),:(0 {"1 Y)
Try that - it works great. Thanks to all who helped!
On Thu, Apr 6, 2017 at 9:28 AM, Raul Miller <[email protected]> wrote:
> When I do this:
>
> mean =: +/ % #
> R =: (50?1e3)%1e3
> Y =: 50 1$^((-i.50)%10) + R-mean R
> plot 0 {"1 (50 1$^((-i.50)%10)),: 0 {"1 Y
>
> I get an overlay plot: http://imgur.com/a/szZKz
>
> Maybe I am not seeing the problem?
>
> What happens when you do it?
>
> Thanks,
>
> --
> Raul
>
>
> On Thu, Apr 6, 2017 at 8:50 AM, Michael Goodrich
> <[email protected]> wrote:
> > Hi Raul,
> >
> > Thanx for responding. There is nothing special about Y - it is a list of
> > 50 numbers which is a machine learning fit of the supplied function and
> > could simply be considered a noisy version of it. I .e Y is something
> like
> >
> > R =. (50?1e3)%1e3
> > Y =. 50 1$^((-i.50)%10) + R-mean R
> >
> > where 'mean' is:
> >
> > mean =. +/ % #
> >
> >
> > (R -mean R) is intended to be a zero mean sample of Gaussian noise -
> > however I cant seem to find how to draw Gaussian samples in J without
> > implementing the Ziggurat algorithm or such - a tip here would also be
> > appreciated!
> >
> >
> > On Thu, Apr 6, 2017 at 8:38 AM, Raul Miller <[email protected]>
> wrote:
> >
> >> Without an example value for Y, it is difficult to say what is going on.
> >>
> >> (A significant question is: are we seeing an issue with plot, or is it
> >> really that plot is doing things right but there is some sort of issue
> >> with the data?)
> >>
> >> --
> >> Raul
> >>
> >>
> >> On Thu, Apr 6, 2017 at 8:15 AM, Michael Goodrich
> >> <[email protected]> wrote:
> >> > I am trying to plot two 1-d data vectors in an overlay plot namely:
> >> >
> >> > plot 0 {"1 (50 1$^((-i.50)%10)),: 0 {"1 Y
> >> >
> >> > Y is a data vector s.t.
> >> >
> >> > $ Y
> >> > 50 1
> >> >
> >> >
> >> > following the pattern:
> >> >
> >> > 'key sin(exp),cos(exp)' plot (;(sin,:cos)@:^) -: >: i:3j100
> >> >
> >> > However is does not work:
> >> >
> >> > The problem seems to be in how to package the data for plot. try as I
> >> > might, I cant discern the problem from the plot examples or doc.
> >> >
> >> > Help would be appreciated!
> >> > ------------------------------------------------------------
> ----------
> >> > For information about J forums see http://www.jsoftware.com/
> forums.htm
> >> ----------------------------------------------------------------------
> >> For information about J forums see http://www.jsoftware.com/forums.htm
> >
> >
> >
> >
> > --
> > Dominus enim Iesus Ecclesiae Suae et,
> >
> > -Michael
> >
> >
> > "Let your religion be less of a theory and more of a love affair."
> > - G.K. Chesterton
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
--
Dominus enim Iesus Ecclesiae Suae et,
-Michael
"Let your religion be less of a theory and more of a love affair."
- G.K. Chesterton
----------------------------------------------------------------------
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