Re: [Matplotlib-users] custom symbols for scatter
On Mon, Apr 27, 2009 at 7:50 AM, Juan Fiol fi...@yahoo.com wrote: Hi, I am trying to put a sphere (rather than circles or disks) as markers for a plot. I am a newbiew so I tried the poor man approach: I plotted several circles one over the other for each point to mimic a sphere (looking it from very far). It kind of worked, except that all are not exactly the same and they distort when I change the aspect ratio of the plot. I am attaching two figures to show what I mean. I looked around in the mailing list and searched all over the web but did not find nothing mentioned. Any help is appreciated. Can you post a self-contained version of your code so that we can see exactly how you make the spheres? You can just use random/hardcoded numbers for the data in the plot. Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma -- Crystal Reports #45; New Free Runtime and 30 Day Trial Check out the new simplified licensign option that enables unlimited royalty#45;free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] custom symbols for scatter
Hi, thanks Ryan for the interest. Here is a short script to produce the data.
The method also breaks if I change too much the radius of the sphere or the
size at which they are plotted.
I am using:
Python 2.5.4
Matplotlib 0.98.5.2
Regards,
Code follows:
###
#!/usr/bin/env python
from matplotlib import pyplot as plt
import matplotlib.mlab as mlab
import numpy as np
NN=9
xmin=0.1
xmax=3.5
x= np.arange(xmin,xmax,.10)
y=np.square(np.sin(x))
# Creamos la figura
fig = plt.figure()
ax = fig.add_subplot(111)
ax.set_yscale('log')
# Sphere radius (also radius and centers for all inner circles)
radio=.1
rads= radio*(1. - np.arange(0,NN)/(1.*NN))
dl= np.array([(radio-r) for r in rads])*radio
ylimits=(0.01,1.2)
for x1,y1 in zip(x,y):
ax.scatter(x1*(1+dl),y1+(y1*dl), cmap=plt.cm.Blues, c=rads,s=2500*rads,
edgecolors='none')
ax.set_xlim(xmin,xmax)
ax.set_ylim(ylimits)
plt.show()
###
--- On Mon, 4/27/09, Ryan May rma...@gmail.com wrote:
From: Ryan May rma...@gmail.com
Subject: Re: [Matplotlib-users] custom symbols for scatter
To: fi...@yahoo.com
Cc: matplotlib-users@lists.sourceforge.net
Date: Monday, April 27, 2009, 5:04 PM
On Mon, Apr 27, 2009 at 7:50 AM, Juan Fiol
fi...@yahoo.com wrote:
Hi, I am trying to put a sphere (rather than circles
or disks) as markers
for a
plot. I am a newbiew so I tried the poor man approach:
I plotted several
circles
one over the other for each point to mimic a sphere
(looking it from very
far).
It kind of worked, except that all are not exactly the
same and they
distort
when I change the aspect ratio of the plot. I am
attaching two figures
to show what I mean.
I looked around in the mailing list and searched all
over the web but did
not
find nothing mentioned. Any help is appreciated.
Can you post a self-contained version of your code so that
we can see
exactly how you make the spheres? You can just use
random/hardcoded numbers
for the data in the plot.
Ryan
--
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma
--
Crystal Reports #45; New Free Runtime and 30 Day Trial
Check out the new simplified licensign option that enables unlimited
royalty#45;free distribution of the report engine for externally facing
server and web deployment.
http://p.sf.net/sfu/businessobjects
___
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Matplotlib-users@lists.sourceforge.net
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Re: [Matplotlib-users] custom symbols for scatter
Juan Fiol fi...@yahoo.com writes: Hi, I am trying to put a sphere (rather than circles or disks) as markers for a plot. One approach could be to make a PatchCollection of suitable patches - see http://matplotlib.sourceforge.net/examples/api/patch_collection.html for an example of PatchCollection, and http://matplotlib.sourceforge.net/examples/pylab_examples/dolphin.html for a fairly complicated user-defined Patch. Matplotlib doesn't do any gradient fills yet, so you're a little limited in drawing the sphere. Another option is to make a bitmap drawing of a sphere in e.g. Gimp and put multiple copies of it at various coordinates, but I don't think this is well-supported currently. -- Jouni K. Seppänen http://www.iki.fi/jks -- Crystal Reports #45; New Free Runtime and 30 Day Trial Check out the new simplified licensign option that enables unlimited royalty#45;free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] custom symbols for scatter
Thanks Jouni, my first try was to make a PNG in gimp and use imread/imshow but it did not work with Log scale. I think that the best approach would be to create an object (may be a patch) with the sphere and put it in the plots but I do not know how to do it and will not have the time to investigate it for a couple of weeks. Thanks, for your reply -- Crystal Reports #45; New Free Runtime and 30 Day Trial Check out the new simplified licensign option that enables unlimited royalty#45;free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
