Re: [Matplotlib-users] Information request
Jeff, I totally agree this is due to missing values Again I've got difficulties to find good words so forgive me, what I tried to say is that the ability to have that border transparent would be a good feature in next releases, for people who need to interpolate and plot such data and have an aesthetic result Imshow is the ideal candidate for satellite data as it has some nice interpolation features and it is fast, so it can be batch-run on the server every time we receive data, without too much computation time The alternative I'm using now is a double or quadruple size grid to reduce the width of that border, with background color set to the lower colormap color That way, the border is really hard to see and it makes (almost) quality plots for publications -Original Message- From: Jeff Whitaker [mailto:[EMAIL PROTECTED] Sent: Thursday, 25 September, 2008 15:34 To: De Pauw Antoine Cc: 'Matplotlib Users' Subject: Re: [Matplotlib-users] Information request De Pauw Antoine wrote: Jeff, Thanks for the tip, it's now working perfectly However, there's still that border with the imshow plot, and I think it would be good to have it transparent There's a zoomed picture I made: http://img218.imageshack.us/img218/5833/imshowborderxz9.png You see the shadow around the data... It would be nice for next releases of Matplotlib to get rid of that, but I'm not able to patch it myself or so... I know there's still a lot of work with the lib but keep the good work, it is really fantastic Thanks for your help! Antoine De Pauw Collaborateur de recherches, Informatique - Research collaborator, IT Laboratoire de chimie quantique et photophysique - Quantum chemistry and photophysics laboratory Université Libre de Bruxelles - ULB Antoine: I thought we agreed that it's not an imshow bug - but rather due to the griddata gridding procedure returning missing values outside the convex hull of the input data. Do you disagree? I see no such border around an imshow plot that contains no missing values. If you shrink the size of the map plotting region so it's fully within the convex hull of the data, the border disappears. -Jeff -Original Message- From: Jeff Whitaker [mailto:[EMAIL PROTECTED] Sent: jeudi 25 septembre 2008 14:15 To: De Pauw Antoine Cc: 'Matplotlib Users' Subject: Re: [Matplotlib-users] Information request De Pauw Antoine wrote: Hi Jeff, I finally found out how to fill my figure with a background color using axes.set_axis_bgcolor(color), but I'm facing the following problem now: How could I get the lower color of a colormap? This is quite undocumented and I dont know the colormap properties I could use for that I know there must be an accessible value somewhere, like for the ax.get_yticklabels() you gave me If someone had the clue, my problems would then be completely solved Antoine De Pauw Collaborateur de recherches, Informatique - Research collaborator, IT Laboratoire de chimie quantique et photophysique - Quantum chemistry and photophysics laboratory Université Libre de Bruxelles - ULB Antoine: To get the RGBA value associated with a particular data value, just call the colormap as a function as pass it that value. For example import matplotlib.pyplot as plt plt.cm.jet(1) (0.0, 0.0, 0.517825311942959, 1.0) BTW: the 'fill_color' kwarg of drawmapboundary basemap method allows you to set the background color of the map. http://matplotlib.sourceforge.net/basemap/doc/html/api/basemap_api.html It fills only the map region (which for some projections, like the orthographic, is not the same as the axes region). -Jeff -Original Message- From: Jeff Whitaker [mailto:[EMAIL PROTECTED] Sent: mardi 23 septembre 2008 20:38 To: De Pauw Antoine Cc: 'John Hunter'; 'Matplotlib Users' Subject: Re: [Matplotlib-users] Information request De Pauw Antoine wrote: Jeff, I still don't know how to either remove this artifact or fill my arrays with values to remove empty regions, and I'll make a last attempt to resolve it I uploaded a data file here: http://scqp.ulb.ac.be/20080821.b56 The actual code snippet is here: http://snipplr.com/view/8307/map-plotting-python-code-temporary/ I hope you'll be able to reproduce it, I set the cmap to winter for you to see the gap... setting it to hot will make the grayish border visible in high resolution by zooming it... I think the border (not the empty zone) could be an artifact with the hot colormap Antoine De Pauw Collaborateur de recherches, Informatique - Research collaborator, IT Laboratoire de chimie quantique et photophysique - Quantum chemistry and photophysics laboratory Université Libre de Bruxelles - ULB Antoine: Here is a version that just plots the pixels directly, without interpolating to a grid. I personally like this better, since you can
[Matplotlib-users] Legend over plot lines
Is there a way to automatically resize plots (and subplots) and move/resize plot legends so that they don't obscure the plotted data? I have this problem especially on plots with 4 or 5 tracks. I can post an example, but I wasn't sure of the etiquette of posting images to this list. Cheers, Peter - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Legend over plot lines
On Fri, Sep 26, 2008 at 12:52:01PM +0100, Peter Saffrey wrote: Is there a way to automatically resize plots (and subplots) and move/resize plot legends so that they don't obscure the plotted data? I have this problem especially on plots with 4 or 5 tracks. I can post an example, but I wasn't sure of the etiquette of posting images to this list. Yes as *.png. I think it's convinient to understand your problem in a few seconds. By, Friedrich - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] bluemarbel image boundaries in robinson projection
When plotting a global image using the robinson projection and the bluemarble image, I have the problem that the image remains rectangular and goes beyond the curved projection map boundaries (see attachment). Is there anyway around this? Cheers, Momme import mpl_toolkits.basemap as b import numpy as np def draw(center=11.,latres=10.,lonres=10.): m = b.Basemap(projection='robin',lon_0=center) m.drawcoastlines() m.drawmapboundary() m.drawmeridians(np.arange(0,360,lonres),color='0.5',labels=[0,0,0,1]) m.drawparallels(np.arange(-90,90,latres),color='0.5',labels=[1,0,0,0]) im=m.bluemarble() return m - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plotting scattered data from array
El jue, 25-09-2008 a las 22:19 +0200, Oz Nahum escribió: ¿What's the meaning of that data arrange? I can't make any sense of plotting a 2D scatter from a 3D array. when I wrote: head = [[0,0,10], [1,0,13], [2,0,11], [3,0,12], [1,2,11]] my meaning was to represent point of intereset with x, y coordinates and the 3rd number was height for example. I felt like I couldn't access the individual points easily, because their are located in on big list... So I wanted to have the list broken into rows, and the each row represents a value on the y axis... like this: head = [ [[0,0,10], [0,0,13]], [[2,0,11], [3,0,12]], ] Mm... maybe this is better for your eyes but not for processing, I think. But that's redundant I think now, after looking into the function zip. Maybe I could write head in the following way: # j = 0 1 head = [ [[0,10], [1,13]], # i =0 [[0,11], [1,12]], # i =1 ] The same. Parsing a data file usually yields a sequence of rows (records), data processing functions usually expects columns of homogeneous data and convert from records to columns and back is pretty straightforward using zip. If you want to use a different representation for your data you'll need to handle more complex structures and conversions. Do it if you think it pays (sometimes it does). But actually after understanding what zip does, I think I don't need it anyway... Talking about this: can you give me an example of another use of zip ? not just zip(*head) I did help(zip) but I could partially understand what it does. I learned more by doing: x,y,z = zip(*head) and then printing x,y,z individually. There is no other use I can think of. If you think of the arguments passed to zip as rows, it returns the columns. If the arguments are columns, zip returns rows. How you name things depends on how you think of your data. There is no other use I can think of. zip expects each row (if they are rows) to be passed as an argument so you usually need that * thing to unpack them. When you call zip(*x), x being a sequence or array-like, you are actually passing each element of x as an argument to zip. Try this: numbers = [1, 2, 3, 4, 5] english = ['one', 'two', 'three', 'four', 'five'] spanish = ['uno', 'dos', 'tres', 'cuatro', 'cinco'] x = [numbers, english, spanish] zip(numbers, english, spanish) zip(x) zip(*x) You can learn about unpacking and zipping sequences reading the Python Tutorial or another similar resource (maybe Dive into Python dives into it, not sure but a useful reading anyway). Goyo - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] formatting figures for publciation
Is there anything akin to this MATLAB script: http://www.mathworks.com/company/newsletters/digest/june00/export/ available for mpl? or some simple set of commands that will accomplish the same task? -gideon - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
