Redirecting this from Kevin back to the group, because I think at least
plot2d is good enough for anyone to play with now.
I've put all of it here:
https://github.com/ntoronto/plt-stuff/tree/master/plot
The main module files are meant to be plot2d.rkt and plot3d.rkt. Both
contain tests right now. In particular, Kevin, the tests in plot2d.rkt
show how to generate simple 2D plots and save them to files.
(In fact, I've just added plot2d->file, which writes a plot to a file or
output stream using any bitmap or vector format that Racket supports. I
haven't tested it much, but it appears to work.)
This code is very young and fairly untested; standard warnings apply.
(May pillage your families and murder your crops, etc.) The interface
WILL change, so don't count on it.
Neil T
On 08/03/2011 09:41 AM, Kevin Tew wrote:
Have a github link yet?
I have a simple line graph I need to generate and would like to give
your 2d plot a try.
Kevin
On 08/02/2011 11:33 AM, Neil Toronto wrote:
Re-routing this email exchange to [racket-dev] for comments.
Long story short: Jay roped me into replacing the current `plot'
module by wrapping a plot library I was working on for my own use.
(FWIW, I'm happy to finally contribute something!) Intended features:
1. Doesn't depend on an FFI to libplplot
2. Can automatically place plot area on functions and points
3. Uses parameters for keyword argument default values
4. Uses only dc<%> primitives / Is very pretty
5. Is more flexible (when using the new plot2d and plot3d modules)
Linux screenshots:
http://students.cs.byu.edu/~ntoronto/plot2d.png
http://students.cs.byu.edu/~ntoronto/plot3d.png
The first shows off the almost-finished plot2d. It's as fast as the
original `plot', and `shade' is twice as fast. Props to Matthew and
Linux's foreign drawing libs for making it look so nice.
The second shows off 3d-plot-area%, which wraps a dc<%> with 3d
drawing primitives. The new plot3d will be 1.5x-2x slower, but the new
features (e.g. compositing 3d plots, contours) should be worth it.
I'll push code to github soon, and ask for volunteers to verify that
it looks good on Mac and Windows.
Specific questions
------------------
Matthew: It should look good on Mac and Windows if their drawing libs
do subpixel-accurate, high-quality antialiasing. Do they?
Doug and other heavy `plot' users: What can I add to plot2d and plot3d
to make your life easier?
Noel: Do you happen to have a kernel density estimator implementation
that uses FFT or is otherwise more efficient than O(n^2)? Currently,
(plot2d (density samples)) works, but is slow on large samples.
Anyone: Are there any original `plot' features that should *not* be
emulated in the new `plot' wrapper module?
Anyone: Is it easy/possible to manipulate snip%s with, say, a
click-and-drag? How about placing edit boxes on them? If it's not
hard, I would like to make the 3d plots manipulatable after rendering.
Neil T
On 07/30/2011 02:01 PM, Jay McCarthy wrote:
Yup, so that old programs will keep working.
Will you support the line fitting?
Jay
On Sat, Jul 30, 2011 at 1:56 PM, Neil Toronto<neil.toro...@gmail.com>
wrote:
Sure can! Does "compatible source library" mean a bunch of wrappers
for the
functions "plot" currently exports?
Neil
On 07/30/2011 05:49 AM, Jay McCarthy wrote:
Awesome. We've been wanting to throw it out for a long time. Can you
make a compatible source library too... so we can replace it in the
core?
Jay
On Fri, Jul 29, 2011 at 10:35 PM, Neil Toronto<neil.toro...@gmail.com>
wrote:
I've attached a screenshot of what I'm working on.
It's a replacement for Racket's plot module. The plot module has
these
drawbacks:
1. It's not smart enough to automatically size plots to the things -
"renderers" - you're plotting. A renderer is only a function that
accepts
an
image snip, so the plotter can't compute a rectangle that contains
it.
2. It depends on an external library, plplot.
3. It draws ugly curves because plplot can't draw lines with
subpixel-accurate endpoints. Also, plplot messes up antialiasing
when the
curves are made of too many lines. Whatever Racket uses doesn't
have this
problem, at least on Linux.
4. It doesn't use parameters for things for which parameters make
sense,
like the size of the plots.
I could probably alter the plot module for any one or two of these
and
submit patches. For all four, writing a replacement makes more sense.
FWIW, this is related to my research. I've been using R to generate
plots,
but it's getting annoying to serialize samples in Racket and then
unserialize them in R.
Also, Bayesians make a LOT of plots. It's *really* nice to display
them
using image snips. That's very, very cool.
This project feels vacation-y and relaxing. I figure it's because it
doesn't
require any more math than linear algebra. :D
Neil
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