Re: [Matplotlib-users] Basemap/ orthographic projection plot doesn't respect globe boundary
Picking up on an old thread. Hopefully Jeff is still listening in... On 2010-04-04 23:24, Jeff Whitaker wrote: On 4/4/10 11:06 AM, Will Hewson wrote: Hi again Jeff et al... I've had a play around with the extra few lines of code - on paper this seems like it should solve the problems I'm experiencing. However, an error's being thrown up by the transform scalar function, as my lons and lats won't necessarily be increasing. The data I'm plotting is satellite data and so at the beginning and end of the orbit file lats go over the pole from 90 to -90, with a similar problem for the lons - whereby the data is taken across the satellite track. I've thought about sorting the data before passing it to transform_scalar but I'm always going to be left with the problem in either lats or lons. I've uploaded the file I'm currently working with this time. It's three columns of lons, lats and z values. Once again, many thanks for your help. Will. http://old.nabble.com/file/p28133659/test.plt test.plt Will: Is it a regular lat/lon grid or a satellite swath? If it's the latter, you can't use my solution. -Jeff What if it _is_ a satellite swath? Can I get around the problem of off-projection plotting with Basemap.pcolormesh()? Example code and plots can be found at http://pythonbits.blogspot.com/2011/09/i-have-problem-with-basemap-plotting.html Thanks, Jakob Malm -- Doing More with Less: The Next Generation Virtual Desktop What are the key obstacles that have prevented many mid-market businesses from deploying virtual desktops? How do next-generation virtual desktops provide companies an easier-to-deploy, easier-to-manage and more affordable virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] stacked bar chart
Hello, I have found http://matplotlib.sourceforge.net/plot_directive/mpl_examples/pylab_examples/histogram_demo_extended_05.hires.png http://matplotlib.sourceforge.net/plot_directive/mpl_examples/pylab_examples/histogram_demo_extended.py How is it possible to the following draw stacked bar charts with number in the chart: http://www.jpowered.com/php-scripts/stacked-bar-chart.htm http://gnuplot.sourceforge.net/demo_4.2/showcase_plot.png Thank you in advance. -- Doing More with Less: The Next Generation Virtual Desktop What are the key obstacles that have prevented many mid-market businesses from deploying virtual desktops? How do next-generation virtual desktops provide companies an easier-to-deploy, easier-to-manage and more affordable virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] color bar ticks
Dear List, how is it possible to change the color of the ticks of a colorbar, created using : cb = mpl.colorbar.ColorbarBase(ax, cmap=cmap,norm=norm,orientation='horizontal',format=formatter) Thanks in advance ! yves -- (o o) oOO--(_)--OOo--- Dr. Yves Revaz Laboratory of Astrophysics Ecole Polytechnique Fédérale de Lausanne (EPFL) Observatoire de Sauverny Tel : ++ 41 22 379 24 28 51. Ch. des Maillettes Fax : ++ 41 22 379 22 05 1290 Sauverny e-mail : yves.re...@epfl.ch SWITZERLAND Web : http://www.lunix.ch/revaz/ -- Doing More with Less: The Next Generation Virtual Desktop What are the key obstacles that have prevented many mid-market businesses from deploying virtual desktops? How do next-generation virtual desktops provide companies an easier-to-deploy, easier-to-manage and more affordable virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] one pixel white border : bug ?
Dear List,
when I'm saving a plot with the option facecolor='k',
around my image, there is still a one pixel white border.
How is it possible to remove this ?
try for example this very simple script:
(using )
import pylab as pt
from numpy import *
x = arange(0,10)
y = x**2
pt.plot(x,y)
pt.savefig('qq.png',facecolor='k')
Thanks in advance.
yves
--
(o o)
oOO--(_)--OOo---
Dr. Yves Revaz
Laboratory of Astrophysics
Ecole Polytechnique Fédérale de Lausanne (EPFL)
Observatoire de Sauverny Tel : ++ 41 22 379 24 28
51. Ch. des Maillettes Fax : ++ 41 22 379 22 05
1290 Sauverny e-mail : yves.re...@epfl.ch
SWITZERLAND Web : http://www.lunix.ch/revaz/
--
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What are the key obstacles that have prevented many mid-market businesses
from deploying virtual desktops? How do next-generation virtual desktops
provide companies an easier-to-deploy, easier-to-manage and more affordable
virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/
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Re: [Matplotlib-users] one pixel white border : bug ?
On Thu, Sep 8, 2011 at 10:30 AM, Yves Revaz yves.re...@epfl.ch wrote:
Dear List,
when I'm saving a plot with the option facecolor='k',
around my image, there is still a one pixel white border.
How is it possible to remove this ?
try for example this very simple script:
(using )
import pylab as pt
from numpy import *
x = arange(0,10)
y = x**2
pt.plot(x,y)
pt.savefig('qq.png',facecolor='k')
Thanks in advance.
yves
yves,
This might depend on the version of matplotlib and which backend you are
using. I currently do not see this white line on my development build of
mpl using the GTKAgg backend. What are you using?
Ben Root
--
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What are the key obstacles that have prevented many mid-market businesses
from deploying virtual desktops? How do next-generation virtual desktops
provide companies an easier-to-deploy, easier-to-manage and more affordable
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Re: [Matplotlib-users] stacked bar chart
On Thu, Sep 8, 2011 at 7:11 AM, xyz mit...@op.pl wrote: Hello, I have found http://matplotlib.sourceforge.net/plot_directive/mpl_examples/pylab_examples/histogram_demo_extended_05.hires.png http://matplotlib.sourceforge.net/plot_directive/mpl_examples/pylab_examples/histogram_demo_extended.py How is it possible to the following draw stacked bar charts with number in the chart: http://www.jpowered.com/php-scripts/stacked-bar-chart.htm http://gnuplot.sourceforge.net/demo_4.2/showcase_plot.png Thank you in advance. The histogram() function is merely a convenience function that performs both the histogramming calculation and calls bar() under the hood. Bar charts are capable of being stacked using the bottom kwarg: http://matplotlib.sourceforge.net/examples/pylab_examples/bar_stacked.html As for numbers with the bars: http://matplotlib.sourceforge.net/examples/pylab_examples/barchart_demo.html http://matplotlib.sourceforge.net/examples/pylab_examples/barchart_demo2.html I hope this helps! Ben Root -- Doing More with Less: The Next Generation Virtual Desktop What are the key obstacles that have prevented many mid-market businesses from deploying virtual desktops? How do next-generation virtual desktops provide companies an easier-to-deploy, easier-to-manage and more affordable virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] it is possible to use basemap to create regular spaced lat/lon grids?
Hi, sorry that it has taken me so long to reply. Anyway, i could be wrong, but i don't think that the code: xi = np.linspace(llcrnlon,urcrnlon,1000) yi = np.linspace(llcrnlat,urcrnlat,1000) will produce a grid which gives the lat/lon coordinates with 1km spacing. The reason being is that the distance between 2 lons (say -117.731659 and -91.303642) is different depending on where you are in terms of the latitude (i.e. the extreme examples are of course the north pole vs the equator). So the above gives a regular grid in terms of degrees but not in terms of distance. Anyway, but the example was still helpful in terms of getting me started with the griddata issue. In my experience the mlab.griddate fcn did not work as well as the scipy.griddata (but that could be a user error as well ... ). Not sure why though. It might be the size of my source data and the destination grid. I had to upgrade to the 64-bit python to be able to access enough memory. thanks matt On 9/6/2011 12:36 PM, Aman Thakral wrote: Hi Matt, Something like this?: def create_map(ax, llcrnrlon,llcrnrlat,urcrnrlon,urcrnrlat): m = Basemap(llcrnrlon=llcrnrlon,llcrnrlat=llcrnrlat,urcrnrlon=urcrnrlon,urcrnrlat=urcrnrlat,resolution='i',projection='cyl',lon_0=(urcrnrlon+llcrnrlon)/2,lat_0=(urcrnrlat+llcrnrlat)/2) m.drawcoastlines() m.drawmapboundary() m.drawstates(linewidth=3) m.fillcontinents(color='lightgrey',lake_color='white') m.drawcountries(linewidth=3) return m def plotMapData(ax,data): lats = [] lons = [] val = [] for k,v in data.iteritems(): lats.append(float(k[0])) lons.append(float(k[1])) val.append(float(v)) value = np.array(val) lat = np.array(lats) lon = np.array(lons) llcrnlon = lon.min()-0.5 llcrnlat = lat.min()-0.5 urcrnlon = lon.max()+0.5 urcrnlat = lat.max()+0.5 xi = np.linspace(llcrnlon,urcrnlon,1000) yi = np.linspace(llcrnlat,urcrnlat,1000) zi = griddata(lon,lat,value,xi,yi) cmap = cm.jet m = create_map(ax,llcrnlon,llcrnlat,urcrnlon,urcrnlat) cs = ax.contour(xi,yi,zi,15,linewidth=0.5,cmap=cmap,alpha=0.5) ax.contourf(xi,yi,zi,15,cmap=cmap,zorder=1000,alpha=0.5) colorscale = cm.ScalarMappable() colorscale.set_array(value) colorscale.set_cmap(cmap) colors = colorscale.to_rgba(value) ax.scatter(lon,lat,c=colors,zorder=1000,cmap=cmap,s=10) colorbar(colorscale, shrink=0.50, ax=ax,extend='both') On Tue, Sep 6, 2011 at 1:28 PM, Matt Funk matze...@gmail.com mailto:matze...@gmail.com wrote: Hi, i want to interpolate irregular spaced satellite data onto a regular spaced grid. The regular spaced grid should have cell sizes of 1km^2. Is it possible to use basemap to create such a grid. It looked like it includes some facilities like that, but i am not sure if they are meant to be used by end user or more like internal fcns (the makegrid fcn for example). Any advice would be appreciated. thanks matt -- Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free Love Thy Logs t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net mailto:Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Matt Funk Research Associate Plant and Environmental Scienc. Dept. New Mexico State University -- Doing More with Less: The Next Generation Virtual Desktop What are the key obstacles that have prevented many mid-market businesses from deploying virtual desktops? How do next-generation virtual desktops provide companies an easier-to-deploy, easier-to-manage and more affordable virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Basemap/ orthographic projection plot doesn't respect globe boundary
On 9/8/11 1:51 AM, Jakob Malm wrote: Picking up on an old thread. Hopefully Jeff is still listening in... On 2010-04-04 23:24, Jeff Whitaker wrote: On 4/4/10 11:06 AM, Will Hewson wrote: Hi again Jeff et al... I've had a play around with the extra few lines of code - on paper this seems like it should solve the problems I'm experiencing. However, an error's being thrown up by the transform scalar function, as my lons and lats won't necessarily be increasing. The data I'm plotting is satellite data and so at the beginning and end of the orbit file lats go over the pole from 90 to -90, with a similar problem for the lons - whereby the data is taken across the satellite track. I've thought about sorting the data before passing it to transform_scalar but I'm always going to be left with the problem in either lats or lons. I've uploaded the file I'm currently working with this time. It's three columns of lons, lats and z values. Once again, many thanks for your help. Will. http://old.nabble.com/file/p28133659/test.plt test.plt Will: Is it a regular lat/lon grid or a satellite swath? If it's the latter, you can't use my solution. -Jeff What if it _is_ a satellite swath? Can I get around the problem of off-projection plotting with Basemap.pcolormesh()? Example code and plots can be found at http://pythonbits.blogspot.com/2011/09/i-have-problem-with-basemap-plotting.html Thanks, Jakob Malm Jakob: I think that's the price you pay for the speed of pcolormesh (vs pcolor). It appears to make more assumptions about the structure of your data. I don't see any way around it. -Jeff -- Doing More with Less: The Next Generation Virtual Desktop What are the key obstacles that have prevented many mid-market businesses from deploying virtual desktops? How do next-generation virtual desktops provide companies an easier-to-deploy, easier-to-manage and more affordable virtual desktop model.http://www.accelacomm.com/jaw/sfnl/114/51426474/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
