how to make scatter plot and bar graphs in same figure?

hello,

is there a way to make a 2d scatter plot that includes (outside the axes) histograms of the marginals of the two variables? like the matlab function ‘scatterhist’. see this for an example:

http://www.mathworks.com/access/helpdesk/help/toolbox/stats/index.html?/access/helpdesk/help/toolbox/stats/scatterhist.html

ideally i’d like the histograms outside the scatter plot to also have axes so that the height of each histogram bar will be interpretable.

i understand that there’s no command for this - but how can i construct it? i would not mind writing code to do this… if it’s possible. right now this is the only thing keeping me from switching from matlab to matplotlib exclusively since i use these graphs a lot

thank you

Attached is a very simple example that shows how to do something similar
to scatterhist in matplotlib

Manuel

per freem wrote:

scatter_hist.py (898 Bytes)

···

hello,

is there a way to make a 2d scatter plot that includes (outside the axes)
histograms of the marginals of the two variables? like the matlab function
'scatterhist'. see this for an example:

http://www.mathworks.com/access/helpdesk/help/toolbox/stats/index.html?/access/helpdesk/help/toolbox/stats/scatterhist.html

ideally i'd like the histograms outside the scatter plot to also have axes
so that the height of each histogram bar will be interpretable.
i understand that there's no command for this - but how can i construct it?
i would not mind writing code to do this... if it's possible. right now
this is the only thing keeping me from switching from matlab to matplotlib
exclusively since i use these graphs a lot

thank you

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That’s a nice example. Are you going to check that into SVN?

Ryan

···

On Mon, Feb 16, 2009 at 7:22 AM, Manuel Metz <mmetz@…1721…> wrote:

Attached is a very simple example that shows how to do something similar

to scatterhist in matplotlib


Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

Ryan May wrote:

Attached is a very simple example that shows how to do something similar
to scatterhist in matplotlib

That's a nice example. Are you going to check that into SVN?

Yes, soon ...

···

On Mon, Feb 16, 2009 at 7:22 AM, Manuel Metz <mmetz@...1721...>wrote:

Ryan

thank you very much for this (i include your code below).

one question about this: how can i remove the top x-axis and the right yaxis from each of the marginal histograms? in other words, keep only the left y-axis and the bottom x-axis of each of the histograms.

thank you.

mport numpy as np
import matplotlib.pyplot as plt
from matplotlib.ticker import NullFormatter

x = np.random.randn(1000)
y = np.random.randn(1000)

nullfmt = NullFormatter() # no labels

left, width = 0.1, 0.65
bottom, height = 0.1, 0.65
bottom_h = left_h = left+width+0.02

rect1 = [left, bottom, width, height]
rect2 = [left, bottom_h, width, 0.2]
rect3 = [left_h, bottom, 0.2, height]

start with a rectangular figure

#fig = plt.Figure( (8,8) )

axScatter = plt.axes(rect1)
axHistx = plt.axes(rect2)#, sharex=axScatter)
axHisty = plt.axes(rect3)#, sharey=axScatter)

axHistx.xaxis.set_major_formatter(nullfmt)
axHisty.yaxis.set_major_formatter(nullfmt)

axScatter.scatter(x,y)

bins = np.linspace(-4,4,21)
axHistx.hist(x, bins=bins)
axHisty.hist(x, bins=bins, orientation=‘horizontal’)

axHistx.set_xlim( axScatter.get_xlim() )
axHisty.set_ylim( axScatter.get_ylim() )

plt.show()

···

On Mon, Feb 16, 2009 at 8:22 AM, Manuel Metz <mmetz@…1721…> wrote:

Attached is a very simple example that shows how to do something similar

to scatterhist in matplotlib

Manuel

per freem wrote:

hello,

is there a way to make a 2d scatter plot that includes (outside the axes)

histograms of the marginals of the two variables? like the matlab function

‘scatterhist’. see this for an example:

http://www.mathworks.com/access/helpdesk/help/toolbox/stats/index.html?/access/helpdesk/help/toolbox/stats/scatterhist.html

ideally i’d like the histograms outside the scatter plot to also have axes

so that the height of each histogram bar will be interpretable.

i understand that there’s no command for this - but how can i construct it?

i would not mind writing code to do this… if it’s possible. right now

this is the only thing keeping me from switching from matlab to matplotlib

exclusively since i use these graphs a lot

thank you



Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA

-OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise

-Strategies to boost innovation and cut costs with open source participation

-Receive a $600 discount off the registration fee with the source code: SFAD

http://p.sf.net/sfu/XcvMzF8H



Matplotlib-users mailing list

Matplotlib-users@lists.sourceforge.net

https://lists.sourceforge.net/lists/listinfo/matplotlib-users


Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA

-OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise

-Strategies to boost innovation and cut costs with open source participation

-Receive a $600 discount off the registration fee with the source code: SFAD

http://p.sf.net/sfu/XcvMzF8H


Matplotlib-users mailing list

Matplotlib-users@lists.sourceforge.net

https://lists.sourceforge.net/lists/listinfo/matplotlib-users