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[Matplotlib-users] ginput() equivalent?
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From: Sajec, M. T. <ms...@tq...> - 2005-04-11 22:10:13
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Is there a simple way to grab x,y coordinates from active plot in a manner similar to using matlab's ginput() function? =20 Thanks in advance, -M. My setup: WxAgg backend Matplotlib-0.74 -----Original Message----- From: mat...@li... [mailto:mat...@li...] On Behalf Of mat...@li... Sent: Thursday, April 07, 2005 8:19 PM To: mat...@li... Subject: Matplotlib-users digest, Vol 1 #550 - 11 msgs Send Matplotlib-users mailing list submissions to mat...@li... To subscribe or unsubscribe via the World Wide Web, visit https://lists.sourceforge.net/lists/listinfo/matplotlib-users or, via email, send a message with subject or body 'help' to mat...@li... You can reach the person managing the list at mat...@li... When replying, please edit your Subject line so it is more specific than "Re: Contents of Matplotlib-users digest..." Today's Topics: 1. Re: Using RendererAgg with windows (jim) 2. Re: Using RendererAgg with windows (John Hunter) 3. py2exe Problems... (and...@ti...) 4. problems with py2exe (oli...@ma...) 5. imshow axis directions (Stephen Walton) 6. Re: imshow axis directions (Perry Greenfield) 7. Re: imshow axis directions (John Hunter) 8. feature request (Rich Drewes) 9. Re: imshow axis directions (Stephen Walton) 10. Re: imshow axis directions (Robert Kern) 11. Re: imshow axis directions (Stephen Walton) --__--__-- Message: 1 From: jim <jl...@yv...> To: John Hunter <jdh...@ac...> Subject: Re: [Matplotlib-users] Using RendererAgg with windows Date: Thu, 7 Apr 2005 03:29:12 +0000 Cc: mat...@li... John: What I need to do is create drawings of windows (as in plug holes in houses and let in light) with grid and other options on the fly. So what I need are the graphic primitives -- canvas, lines, fills ... The output needs to be a graphic file. =20 I will go back and study the docs, but a suggestion of what area to use would be most welcome. Or, of course, a different module than matplotlib if that would be more appropriate. Thanks, Jim On Wednesday 06 April 2005 08:13 pm, you wrote: > >>>>> "jim" =3D=3D jim <jl...@yv...> writes: >=20 > jim> Running this script gives the results below #! /usr/bin/env > jim> python >=20 > jim> from matplotlib.backends.backend_agg import RendererAgg from > jim> matplotlib.transforms import Value >=20 > I know there are examples in the pdf user's guide discussing how to=20 > use the backend renderer directly, and these are meant mostly to be=20 > helpful to matplotlib developers. Unfortunately, the guide has lagged > behind the current development state. The backend renderer API is in=20 > a transition state right now as we try to introduce some new methods=20 > to solve some old problems. In particular, the draw_lines method that > you are experiencing problems with has recently had a change in its=20 > call signature. >=20 > These changes have been discussed at some length recently on the=20 > matplotlib-devel list. If you are interested, you might want to=20 > browse the matplotlib-devel archives and/or join the mailing list; see > for example >=20 http://sourceforge.net/mailarchive/forum.php?thread_id=3D6938045&forum_id= =3D 36187 . >=20 > Thanks for reporting this discrepancy -- in the near term the backend=20 > API shouldn't be used on the user side. If there is something you=20 > want to do but can't in the current API let me know. >=20 > As for the platform specific differences you report, my first guess is > that the matplotlib versions may not be the same. I wouldn't expect=20 > platform specific differences in the backend API for the same version. >=20 > JDH >=20 >=20 >=20 >=20 --__--__-- Message: 2 To: jim <jl...@yv...> Cc: mat...@li... Subject: Re: [Matplotlib-users] Using RendererAgg with windows From: John Hunter <jdh...@ac...> Date: Wed, 06 Apr 2005 22:47:56 -0500 >>>>> "jim" =3D=3D jim <jl...@yv...> writes: jim> John: What I need to do is create drawings of windows (as in jim> plug holes in houses and let in light) with grid and other jim> options on the fly. jim> So what I need are the graphic primitives -- canvas, lines, jim> fills ... The output needs to be a graphic file. You probably want to be using matplotlib primitives. Assuming you have a matplotlib.axes.Axes (or Subplot) instance stored as "ax", The primitives are matplotlib.lines.Line2D - add with ax.add_line=20 matplotlib.patches.Rectangle - add with ax.add_patch matplotlib.patches.Polygon - add with ax.add_patch matplotlib.patches.RegularPolygon - add with ax.add_patch matplotlib.patches.Circle - add with ax.add_patch matplotlib.patches.Text - add with ax.add_artist Ie, there are not too many mpl primitives, and using these will insulate you from changes in the mpl backend (renderer) api. The backend API is meant only for mpl developers. The classes referred to above are all part of the matplotlib Artist hierarchy. jim> I will go back and study the docs, but a suggestion of what jim> area to use would be most welcome. Or, of course, a jim> different module than matplotlib if that would be more jim> appropriate. To reiterate, there is one base class matplotlib.artist.Artist that all the objects that render into the figure derive from. From this, there are just a few derived classes to be aware of: Line2D, Patch, Text, and Collection. From these there are a few more derived classes (eg Patch and Collection have some specialized derived classes, Line2D and Text do not as of yet). Other Artists (including Figure, Axes, Legend, Table and so on) are simply composites of these primitive types. See the following class docs for more info: http://matplotlib.sourceforge.net/matplotlib.artist.html http://matplotlib.sourceforge.net/matplotlib.lines.html http://matplotlib.sourceforge.net/matplotlib.patches.html http://matplotlib.sourceforge.net/matplotlib.text.html http://matplotlib.sourceforge.net/matplotlib.collections.html In short, you should concentrate on building the primitive types you need rather than calling the renderer methods directly. The primitives will call the right renderer methods as necessary (as they do in matplotlib.lines, for example). Hope this helps, JDH --__--__-- Message: 3 Date: Thu, 7 Apr 2005 11:03:38 +0200 From: and...@ti... To: mat...@li... Subject: [Matplotlib-users] py2exe Problems... Hello NG, this morning I have done the really BIG mistake of uninstalling the following things: - Numeric 23.5 - ctypes 0.9.2 - numarray 1.1.1 - Matplotlib 0.72 And I have installed the following: - Numeric 23.8 - ctypes 0.9.6 - numarray 1.2.3 - Matplotlib 0.74 Using py2exe 0.5.4, now I get some errors on not-found modules, that I pu=3D t at the end of the mail. I have never encountered these problems with olde=3D r versions of the aforementioned tools. Please note that, a part the VTK th=3D ings, almost all the missing modules are from numerix/backends. If I try to sta=3D rt the application, I get a Visual C++ runtime error (and not the usual MYEX=3D E.exe.log message from py2exe, so I do not know how to track the error).=20 I am on a Windows 2000 machine. Deinstalling the new tools and re-installing the old ones didn't help any=3D more... Does anyone have a suggestion? ['backends.draw_if_interactive', 'backends.new_figure_manager', 'backends=3D .show', 'cephes', 'dl', 'libvtkCommonPython', 'libvtkFilteringPython', 'libvtkGr=3D aphicsP ython', 'libvtkHybridPython', 'libvtkIOPython', 'libvtkImagingPython', 'l=3D ibvtkPa rallelPython', 'libvtkPatentedPython', 'libvtkRenderingPython', 'numerix.=3D ArrayTy pe', 'numerix.Complex', 'numerix.Complex32', 'numerix.Complex64', 'numeri=3D x.Float ', 'numerix.Float32', 'numerix.Float64', 'numerix.Int', 'numerix.Int16', 'numeri x.Int32', 'numerix.Int8', 'numerix.Matrix', 'numerix.UInt16', 'numerix.UI=3D = nt32', 'numerix.UInt8', 'numerix.absolute', 'numerix.add', 'numerix.allclose', 'numerix .alltrue', 'numerix.arange', 'numerix.arccos', 'numerix.arccosh', 'numeri=3D x.arcsi n', 'numerix.arcsinh', 'numerix.arctan', 'numerix.arctan2', 'numerix.arct=3D anh', ' numerix.argmax', 'numerix.argmin', 'numerix.argsort', 'numerix.around', 'numerix .array', 'numerix.arrayrange', 'numerix.asarray', 'numerix.asum', 'numeri=3D x.bitwi se_and', 'numerix.bitwise_or', 'numerix.bitwise_xor', 'numerix.ceil', 'nu=3D merix.c hoose', 'numerix.clip', 'numerix.compress', 'numerix.concatenate', 'numer=3D ix.conj ugate', 'numerix.convolve', 'numerix.cos', 'numerix.cosh', 'numerix.cross=3D _correl ate', 'numerix.cumproduct', 'numerix.cumsum', 'numerix.diagonal', 'numeri=3D x.divid e', 'numerix.dot', = 'numerix.equal', 'numerix.exp', 'numerix.fabs', 'numer=3D ix.fft. fft', 'numerix.floor', 'numerix.fmod', 'numerix.fromfunction', 'numerix.f=3D romstri ng', 'numerix.greater', 'numerix.greater_equal', 'numerix.hypot', 'numeri=3D x.ident ity', 'numerix.indices', 'numerix.innerproduct', 'numerix.less', 'numerix=3D .less_e qual', 'numerix.log', 'numerix.log10', 'numerix.logical_and', 'numerix.lo=3D gical_n ot', 'numerix.logical_or', 'numerix.logical_xor', 'numerix.matrixmultiply=3D ', 'num erix.maximum', 'numerix.minimum', 'numerix.mlab.amax', 'numerix.mlab.amin=3D ', 'num erix.mlab.cov', 'numerix.mlab.diff', 'numerix.mlab.flipud', 'numerix.mlab=3D .hannin g', 'numerix.mlab.rand', 'numerix.mlab.std', 'numerix.mlab.svd', 'numerix=3D .multip ly', 'numerix.negative', 'numerix.nonzero', 'numerix.not_equal', 'numerix=3D .nx', ' numerix.ones', 'numerix.outerproduct', 'numerix.pi', 'numerix.power', 'nu=3D merix.p roduct', 'numerix.put', 'numerix.putmask', = 'numerix.rank', 'numerix.ravel=3D ', 'num erix.repeat', 'numerix.reshape', 'numerix.resize', 'numerix.searchsorted'=3D , 'nume rix.shape', 'numerix.sin', 'numerix.sinh', 'numerix.size', 'numerix.somet=3D rue', ' numerix.sort', 'numerix.sqrt', 'numerix.subtract', 'numerix.swapaxes', 'n=3D umerix. take', 'numerix.tan', 'numerix.tanh', 'numerix.trace', 'numerix.transpose=3D ', 'num erix.where', 'numerix.which', 'numerix.zeros', 'vtkParallelPython', 'matp=3D lotlib. numerix.absolute', 'matplotlib.numerix.equal', 'numarray.Complex', 'numar=3D ray.Com plex32', 'numarray.Complex64', 'numarray.Float', 'numarray.Float32', 'num=3D array.F loat64', 'numarray.Int', 'numarray.Int16', 'numarray.Int32', 'numarray.In=3D t8', 'n umarray.NumArray', 'numarray.UInt16', 'numarray.UInt32', 'numarray.UInt8'=3D , 'numa rray._dotblas', 'numarray.asarray', 'numarray.dot', 'numarray.fromlist', 'numarr ay.shape', 'numarray.typecode', 'numarray.zeros', 'wx.BitmapFromImage', 'wx.Empt yIcon'] --__--__-- Message: 4 To: mat...@li... From: oli...@ma... Date: Thu, 7 Apr 2005 11:27:43 +0200 Subject: [Matplotlib-users] problems with py2exe Hi, I have some problems compiling an .exe-file for my application. I use wxPython together with matplotlib and tried to make an .exe-file with both packages for the first time. Windows XP Python 2.4 wxPython 2.5.3.1 matplotlib 0.74 I checked the FAQ at the matplotlib homepage and the py2exe-examples and did the following: from distutils.core import setup import glob import py2exe data =3D glob.glob(r'C:\Python24\Lib\site-packages\matplotlib\*') data.append(r'C:\Python24\Lib\site-packages\matplotlib\.matplotlibrc') setup( console =3D ["PanelCheck.py"], data_files =3D [("matplotlibdata", data)], ) After py2exe is finished I find both folders 'dist' and 'build' as ususal, however I can't finde an .exe-file of my application PanelCheck.py in the dist-folder. I assume that 'window' is what I want to use in the code above, but when I do that I get the following error: --(just a small part of the console output)-- error: can't copy 'C:\Python24\Lib\site-packages\matplotlib\backends': doesn't exist or not a regular file What am I doing wrong? Help is really appreciated! Oliver --__--__-- Message: 5 Date: Thu, 07 Apr 2005 11:08:01 -0700 From: Stephen Walton <ste...@cs...> To: matplotlib-users <mat...@li...> Subject: [Matplotlib-users] imshow axis directions Hi, I was just comparing images displayed with imshow() with what I get from IRAF's display command and ds9. The latter puts the first axis increasing horizontally and the second axis increasing vertically, as if the image array were addressed as img[ix,iy], where ix and iy are integer x and y coordinates. The axes imshow() produces are labeled as if this is true for it as well, but in fact the image is upside down with respect to what I see with IRAF. Even odder, to see the same display I see in IRAF I have to do imshow(img[::-1,:]), as if I'm reversing the direction of the first axis. I've tried to look at the source, really, but I feel like I'm *years* away from being enough of a Python hacker to understand matplotlib. Steve --__--__-- Message: 6 Cc: matplotlib-users <mat...@li...>, Perry Greenfield <pe...@st...> From: Perry Greenfield <pe...@st...> Subject: Re: [Matplotlib-users] imshow axis directions Date: Thu, 7 Apr 2005 14:12:16 -0400 To: Stephen Walton <ste...@cs...> check out the .matplotlibrc image.origin configuration parameter. The default is to have pixel 0,0 on the upper left which is opposite of what us weird astronomers think is the natural locationl Perry On Apr 7, 2005, at 2:08 PM, Stephen Walton wrote: > Hi, > > I was just comparing images displayed with imshow() with what I get=20 > from IRAF's display command and ds9. The latter puts the first axis=20 > increasing horizontally and the second axis increasing vertically, as=20 > if the image array were addressed as img[ix,iy], where ix and iy are=20 > integer x and y coordinates. The axes imshow() produces are labeled=20 > as if this is true for it as well, but in fact the image is upside=20 > down with respect to what I see with IRAF. Even odder, to see the=20 > same display I see in IRAF I have to do imshow(img[::-1,:]), as if I'm > reversing the direction of the first axis. > > I've tried to look at the source, really, but I feel like I'm *years*=20 > away from being enough of a Python hacker to understand matplotlib. > > Steve > > > > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide Read honest & candid=20 > reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://ads.osdn.com/?ad_id=3D6595&alloc_id=3D14396&op=3Dclick > _______________________________________________ > Matplotlib-users mailing list > Mat...@li... > https://lists.sourceforge.net/lists/listinfo/matplotlib-users --__--__-- Message: 7 To: Stephen Walton <ste...@cs...> Cc: matplotlib-users <mat...@li...> Subject: Re: [Matplotlib-users] imshow axis directions From: John Hunter <jdh...@ac...> Date: Thu, 07 Apr 2005 13:15:35 -0500 >>>>> "Stephen" =3D=3D Stephen Walton <ste...@cs...> writes: Stephen> Hi, I was just comparing images displayed with imshow() Stephen> with what I get from IRAF's display command and ds9. The Stephen> latter puts the first axis increasing horizontally and Stephen> the second axis increasing vertically, as if the image Stephen> array were addressed as img[ix,iy], where ix and iy are Stephen> integer x and y coordinates. The axes imshow() produces Stephen> are labeled as if this is true for it as well, but in Stephen> fact the image is upside down with respect to what I see Stephen> with IRAF. Even odder, to see the same display I see in Stephen> IRAF I have to do imshow(img[::-1,:]), as if I'm Stephen> reversing the direction of the first axis. Does changing the rc param image.origin : upper # lower | upper to lower help? Stephen> I've tried to look at the source, really, but I feel like Stephen> I'm *years* away from being enough of a Python hacker to Stephen> understand matplotlib. Hmm, the code's not that bad is it :-) JDH --__--__-- Message: 8 Date: Thu, 7 Apr 2005 11:51:37 -0700 (PDT) From: Rich Drewes <dr...@in...> To: matplotlib-users <mat...@li...> Subject: [Matplotlib-users] feature request Some ability to specify empty space between subplots would be very convenient. I'm not sure if this could best be done at figure creation or at subplot creation with an additional argument that says how much space to leave above or below. The motivation is that creating subplots with separate titles is a very common desire, and doing so now results in title text that invariably overlaps the plot above (or if the font is reduced enough, it may fit but looks squished in there). Using manual axes creation is another approach that has been suggested, but this is a pain and seems to obviate the convenience of subplot(). If there is a better approach than creating custom axes, I'd love to hear about it. Thanks to all the pylab developers! Rich --__--__-- Message: 9 Date: Thu, 07 Apr 2005 12:00:27 -0700 From: Stephen Walton <ste...@cs...> To: John Hunter <jdh...@ni...> CC: matplotlib-users <mat...@li...> Subject: Re: [Matplotlib-users] imshow axis directions John Hunter wrote: >>>>>>"Stephen" =3D=3D Stephen Walton <ste...@cs...> writes: >>>>>> =20 >>>>>> >Does changing the rc param > > image.origin : upper # lower | upper > >to lower help? > =20 > Yes, it makes the image the right way around. I was simply confused because I expected the pixel at (x,y) in the imshow display to be the value of img[x,y]. It appears not to be. I hasten to add MATLAB's worse, as the pixel at (x,y) is actually the value of img[y,x]; MATLAB displays with the first array coordinate increasing downward and the second from left to right. > Stephen> I've tried to look at the source, really, but I feel like > Stephen> I'm *years* away from being enough of a Python hacker to > Stephen> understand matplotlib. > >Hmm, the code's not that bad is it :-) > =20 > I'm sure the code is fine, John, and it's just me. Specifically, if I want to see how matplotlib is doing something, I can't just trace function calls like I'm used to doing with Fortran and C, because there are methods too and I have to find the class which defines those methods to see what's happening. Is there anything like ctags for Python? Steve --__--__-- Message: 10 Date: Thu, 07 Apr 2005 14:35:11 -0700 From: Robert Kern <rk...@uc...> Organization: The Church of Last Thrusday To: mat...@li... Subject: Re: [Matplotlib-users] imshow axis directions Stephen Walton wrote: > I'm sure the code is fine, John, and it's just me. Specifically, if I > want to see how matplotlib is doing something, I can't just trace=20 > function calls like I'm used to doing with Fortran and C, because=20 > there are methods too and I have to find the class which defines those > methods to see what's happening. Is there anything like ctags for Python? Exuberant ctags http://ctags.sourceforge.net/ -- Robert Kern rk...@uc... "In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter --__--__-- Message: 11 Date: Thu, 07 Apr 2005 16:03:17 -0700 From: Stephen Walton <ste...@cs...> To: Robert Kern <rk...@uc...> CC: mat...@li... Subject: Re: [Matplotlib-users] imshow axis directions Robert Kern wrote: > Exuberant ctags > > http://ctags.sourceforge.net/ > Which, as it turns out, is the version of ctags on Fedora Core 3. I did a 'ctags -R' in the matplotlib root directory and am now happily browsing the source using nedit. Thanks, Robert! Steve --__--__-- _______________________________________________ Matplotlib-users mailing list Mat...@li... https://lists.sourceforge.net/lists/listinfo/matplotlib-users End of Matplotlib-users Digest |
