There are other circumstances besides plotting a single point where plot
can hang. I tried the following for wdinfo in qt.ijs but it didn't work.
wdinfo=: 3 : 0
'a b'=. _2{. boxopen y
if. 2=#$b=. ":b do. b=. }.,LF,.b end.
f=. 8 u: DEL&, @ (,&DEL) @ -.&(0 127{a.)
if. 'abort'-:wd 'mb query mb_ok mb_abort ',(f a),' ',(f b)
do. 13!:0]0
end.
''
)
It is not clear whether or not 13!:0]0 will reset the stack when debug is
not turned on. Or maybe another event is triggering the loop. In any case,
it would be great to have APL's empty right arrow to unconditionally clear
the stack.
On Tue, Oct 31, 2017 at 1:49 PM, 'Skip Cave' via Beta <[email protected]>
wrote:
> Chris,
>
> Here's an example of where I want a single point. I am plotting several
> clusters of points and their centroids. Then I want to show the distance
> from a single point in the space (brown marker) to each of those centroids.
> Currently, I have to put a second brown marker somewhere (I put it at the
> origin) to get the main point to show up.
>
> Skip.
>
>
> require 'plot'
>
> load 'stats'
>
> dis =:(+/&.:*:@:-)"1 NB. Euclidean Distance
>
> cent=: (+/%#)"2 NB. Centroid for multiple clusters
>
>
> NB. cl is a cluster generator
>
> NB. It generates a random cluster of 10 points
>
> NB. around x (2=$x) with a spread of y
>
> cl=:4 :'x +"1 y*10 2$rand11 20'
>
>
> NB. Gen plot. 3 clusters, 3 centroids, random marker
>
> pd 'reset;color red'
>
> pd 'type dot;pensize 5'
>
> pd <"1|:a=:10 20 cl 5
>
> pd 'color blue'
>
> pd <"1|:b=:50 10 cl 10
>
> pd 'color green'
>
> pd <"1|:c=:60 70 cl 12
>
> pd 'color fuchsia'
>
> 'd e f' =: cent a,b,:c
>
> pd <"1|:d,e,:f
>
> pd 'color brown'
>
> p =: 55 50
>
> pd 'type marker;markersize 2'
>
> pd <"1|: 0 0,:p
>
> pd 'type line;color blue;pensize 2'
>
> pd <"1 |:d,p,e,p,f,:p
>
> pd 'show'
>
> NB. Euclidean distance from p
>
> ( d dis p),(e dis p),(f dis p)
>
>
> <<<>>>
>
>
> Skip
>
>
>
> Skip Cave
> Cave Consulting LLC
>
> On Tue, Oct 31, 2017 at 2:30 PM, Skip Cave <[email protected]>
> wrote:
>
> > When i am drawing scatter plots, each point is usually a single dot.
> > Different clusters of points are different colored dots. The size & color
> > of the dot is set by using pen size or marker size commands, and color
> > commands. In some cases, there is only one point of a different color
> that
> > must be displayed, often indicating the centroid of a cluster, or some
> > other single point in the space. These single points are usually dots,
> much
> > the same size as other dots around it, but of a different color. Markers
> > also work for this as well.
> >
> > It would be especially nice if I could associate an ascii label to
> > specific dots, to help identify certain attributes of specific points in
> > the space (centroid1, outlier3, etc.)
> >
> > Finally, it would be great to associate weights with a series of points,
> > which would adjust the dot size of each point. This would indicate the
> > size of the population, or the strength of each point in the space.
> >
> > Skip
> >
> > On Oct 31, 2017 6:38 AM, "chris burke" <[email protected]> wrote:
> >
> >> I agree that the code should not just hang, but what do you expect to
> see
> >> when plotting a single point?
> >>
> >> On Tue, Oct 31, 2017 at 12:25 AM, 'Skip Cave' via Beta <
> >> [email protected]>
> >> wrote:
> >>
> >> > Here's a simple plot:
> >> >
> >> > load 'plot'
> >> >
> >> > pd 'reset;color red'
> >> >
> >> > pd 'type marker;markersize 2'
> >> >
> >> > pd <"1|:0 0,:10 10
> >> >
> >> > pd 'show'
> >> >
> >> >
> >> > 1. The above code plots two points, one at 0,0 and one at 10,10. How
> >> can I
> >> > plot just ONE point? The following code hangs, and shows NO dots at
> all
> >> in
> >> > 8.05 & 8.06:
> >> >
> >> > load 'plot'
> >> >
> >> > pd 'reset;color red'
> >> >
> >> > pd 'type marker;markersize 2'
> >> >
> >> > pd <"1|:10 10
> >> >
> >> > pd 'show'
> >> >
> >> >
> >> >
> >> > Skip Cave
> >> > ------------------------------------------------------------
> ----------
> >> > For information about J forums see http://www.jsoftware.com/
> forums.htm
> >> ----------------------------------------------------------------------
> >> For information about J forums see http://www.jsoftware.com/forums.htm
> >
> >
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
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