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
