Hi Ric,

You have written:

data=: _999 ". > cut;._2 freads 'myfile.txt'

But it produces error. I removed the ;.
and it worked.

On 14 Apr 2018 12:32, "Ric Sherlock" <tikk...@gmail.com> wrote:

plot is documented on the J wiki:

http://code.jsoftware.com/wiki/Plot

How best to read/parse your 2-column file will depend on the actual format.
Assuming the fields are separated by one or more spaces the following would
work:


   data=: _999 ". > cut;._2 freads 'myfile.txt'
   'point; pensize 2' plot ;/ |:data



On Sat, Apr 14, 2018 at 5:48 PM, Arnab Chakraborty <arnab...@gmail.com>
wrote:

> Thanks, Ben. That's what I was looking for.
>
> BTW, how to get a complete list of all options supported by plot and pd?
> The labs give only a few. A peep into plot.ijs and jzplot.ijs etc looked
> confusing.
>
> On 14 Apr 2018 06:26, "Ben Gorte" <bgo...@gmail.com> wrote:
>
> > 'point' plot (i.8) j. i.8
> >
> >
> > but you hardly see the points (using jqt), and therefore:
> >
> >
> > 'pensize 2; type point' plot (i.8) j. i.8
> >
> >
> >
> >
> > On Sat, Apr 14, 2018 at 10:12 AM, Arnab Chakraborty <arnab...@gmail.com>
> > wrote:
> >
> > > Hi Bo,
> > >
> > >   Thanks, but when I try
> > >
> > > plot (i.8) j. i.8
> > >
> > > I get a line, and not just 8 points.
> > >
> > > On 13 Apr 2018 22:13, "'Bo Jacoby' via Programming" <
> > > programm...@jsoftware.com> wrote:
> > >
> > > > plot x j. y
> > > >
> > > >
> > > >     Den 17:58 fredag den 13. april 2018 skrev Arnab Chakraborty <
> > > > arnab...@gmail.com>:
> > > >
> > > >
> > > >  Hi all,
> > > >
> > > >   There should really be an easy answer to this, but I don't seem to
> > find
> > > > it.
> > > >
> > > > How to make a scatterplot in j? That is, a plot of (x_i,y_i)'s as
> > > separate
> > > > points. Also, it will be helpful to make a scatterplot from two
> columns
> > > of
> > > > numbers stored in a file. Any idea?
> > > >
> > > > Thanks a lot.
> > > >
> > > > Arnab
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