[Matplotlib-users] colorbar: format labels with mathtext
Hi Everyone, I would like to format the labels of a colorbar with mathtext. I have tried a lot with all the cax.formatter.___ options but unfortunately I was not able to get it working. I am plotting some Data with col = ax.pcolorfast( ... ) after this I create a colorbar with cax = fig.colorbar(col) Then I would like to change the formatter and the powerlimits with cax.formatter.format = '$%1.2f$' cax.formatter.set_powerlimits( (-4,4) ) but this does not work for me. Could you pleas help me to set the powerlimits and to format the labels of a colorbar with mathtext. Regards, Stefan -- Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] tick formatter - floating axis
Hi JJ, thanks a lot for your Answer. Now I have understand how this works and created my one formatter: class MyFormatter(object): def __init__(self, fmt='$%f$'): self.fmt = fmt def __call__(self, direction, factor, values): return [self.fmt % v for v in values] Is there something like this already in Matplotlib? I looked into axisartist but can not find anything similar. Regards Stefan On Thu, 2010-11-11 at 09:38 +0900, Jae-Joon Lee wrote: How do you want your ticklabels formatted? If axisartist does not provide a formatter that fits your need, you can create a custom formatter. Formatter for axisartist can be any callable object with following signature. def Formatter(direction, factor, values): # ... return list_of_string_that corresponds_to_values You may ignore direction and factor parameters for now. For example, class MyFormatter(object): def __call__(self, direction, factor, values): _fmt = $%.1f$ return [_fmt % v for v in values] then you could do grid_helper = floating_axes.GridHelperCurveLinear( tr, extremes=( 1, 2, 1000, 2000 ), tick_formatter1 = None, tick_formatter2 = MyFormatter() ) Regards, -JJ On Wed, Nov 10, 2010 at 10:17 PM, Stefan Mauerberger stefan.mauerber...@mnet-online.de wrote: Hello everyone, I have a question regarding the formatting of ticks in a curved coordinate system. To create my plots I am useing the mpl_toolkits.axisartist.floating_axes.GridHelperCurveLinear() function. This works quite well but I have difficulties with formatting the axis. I am working in a polar coordinate system. To format the longitudinal axis I found the function mpl_toolkits.axisartist.angle_helper.FormatterDMS() and it works good. But I want to chance the formatting of the radius too. For this I need to pass something to the kwargs tick_formatter2 of the function GridHelperCurveLinear but I do not know what. Could you give me some advice? Regards Stefan Here is the code I use: import matplotlib.pyplot as plt import mpl_toolkits.axisartist.floating_axes as floating_axes from matplotlib.projections import PolarAxes fig = plt.figure() tr = PolarAxes.PolarTransform() grid_helper = floating_axes.GridHelperCurveLinear( tr, extremes=( 1, 2, 1000, 2000 ), tick_formatter1 = None, tick_formatter2 = None ) ax1 = floating_axes.FloatingSubplot( fig, 111, grid_helper=grid_helper ) fig.add_subplot( ax1 ) ax1.grid( True ) plt.show() -- The Next 800 Companies to Lead America's Growth: New Video Whitepaper David G. Thomson, author of the best-selling book Blueprint to a Billion shares his insights and actions to help propel your business during the next growth cycle. Listen Now! http://p.sf.net/sfu/SAP-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Centralized Desktop Delivery: Dell and VMware Reference Architecture Simplifying enterprise desktop deployment and management using Dell EqualLogic storage and VMware View: A highly scalable, end-to-end client virtualization framework. Read more! http://p.sf.net/sfu/dell-eql-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] how to make a polar plot just of a section with grid
Hi Frederick, thanks for your answer. The option *faceted* I already knew but this is not exactly what I want. Perhaps it would be possible to draw the grid without labels. My goal is to draw a grid with labels above the data. Similar to the example 'demo curvelinear grid'. Regards Stefan -- Nokia and ATT present the 2010 Calling All Innovators-North America contest Create new apps games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] colormap from blue to transparent to red
Ben, thanks a lot! Your way does exactly what I want. Scott, I do not understand your solution, unfortunately. I have already known the example from the gallery. But up to now, I have not dealt with masked arrays. Anyway ... Thanks a lot again. Stefan -- Download new Adobe(R) Flash(R) Builder(TM) 4 The new Adobe(R) Flex(R) 4 and Flash(R) Builder(TM) 4 (formerly Flex(R) Builder(TM)) enable the development of rich applications that run across multiple browsers and platforms. Download your free trials today! http://p.sf.net/sfu/adobe-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] how to make a polar plot just of a section with grid
Hello everyone, I want to make a polar plot with grid not of the full circle but a section (e.g. r=[5:6], phi=[-20:30]). The result should look like this: http://homepages.physik.uni-muenchen.de/~Stefan.Mauerberger/example.png I have tried a lot and had also looked to the examples but my results are not satisfying. This example http://matplotlib.sourceforge.net/examples/axes_grid/demo_curvelinear_grid.html seems to be highly relevant for my needs but i do not understand it at all. I tried two different ways: Using the option polar=True works fine but I was not able to shrink the plot to the section. Otherwise transforming the data to cartesian coordinates (e.g. pcolor(r*np.sin(phi),r*np.cos(phi),data) ) the data are plotted into a box. But in this case I do not know how to draw a grid. Could anyone give me some advice how to do this? Regards Stefan -- Nokia and ATT present the 2010 Calling All Innovators-North America contest Create new apps games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] colormap from blue to transparent to red
Hi everyone, I am having trouble with colormaps unsing pcolormesh. I would like to plot and colorise a seismic wave field above a map. Plotting works fine but I do not know how to bring transparency into colormaps. For negative values I want the coloration being blue then it should become transparent and the greatest value should be drawn red. I have tried a lot but without any success. As far as I can see, the keyarg alpha does not fit my needs at all. Do you have any suggestions for me? Regards Stefan -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
