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Re: [Matplotlib-users] backend_qt4agg
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From: john p. <jp...@ma...> - 2015-02-12 19:32:02
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Ryan, Thanks again. I have the permissions, I'll reinstall. John On 2/12/2015 11:43 AM, Ryan Nelson wrote: > John, > > It's been a little while since I installed QGIS on my machine, but I > wonder if you missed a selection somewhere in the installation > process. Can you reinstall QGIS? (i.e. do you have admin permissions?) > There might be a number of selections you can make when installing, > and my guess is that you missed a selection to have the proper Python > libraries installed. Maybe there is a "Full" installation option, > which puts everything on your machine. As I said on my installation of > QGIS, that code works just fine, and I'm certain that I haven't done > anything special post-install. > > Ryan > > On Thu, Feb 12, 2015 at 12:37 PM, john polo <jp...@ma... > <mailto:jp...@ma...>> wrote: > > Ryan, > I used the first line of your example and this was the result: > Traceback (most recent call last): > File "<input>", line 1, in <module> > File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 454, > in _import > mod = _builtin_import(name, globals, locals, fromlist, level) > ImportError: No module named matplotlib.pyplot > > I'm not sure what the first command is to confirm whether a module > is installed or not, but it looks like I may need that. > Thanks, Ben and Ryan. > > John > > > On 2/12/2015 10:09 AM, Ryan Nelson wrote: >> John, >> >> As Ben said, the QGIS Windows installer comes with its own Python >> installation, which doesn't know anything about any other Python >> install. Unfortunately, this apparently makes it rather difficult >> to install other packages. However, QGIS Python already contains >> Numpy and Matplotlib and PyQt4, which is what you need here. From >> the Plugins dropdown menu, select Python Console. In the console >> that opens at the bottom of the screen, you should be able to >> type (don't type the > characters): >> >>> import matplotlib.pyplot as plt >> >>> plt.plot([1,2,3]) >> >>> plt.show() >> >> On my install of QGIS, that opens a pop-up window with a plot of >> those data points. Does this throw an error for you too? >> >> Ryan >> >> On Thu, Feb 12, 2015 at 10:35 AM, john polo <jp...@ma... >> <mailto:jp...@ma...>> wrote: >> >> Users, >> I am working on Windows 7 with QGIS 2.4. I am trying to get a >> plugin >> installed in QGIS called Semi-Automatic Classification Plugin >> to work. >> The plugin is demonstrated here: >> http://fromgistors.blogspot.com/2013/07/working-with-multispectral-bands-in-qgis.html >> >> The first time I tried to install the QGIS plugin, I got an error >> message that backend_qt4agg was not installed. I installed >> Python(x,y) >> with Python 2.x, because it seemed like the easiest way to get >> matplotlib and a bunch of other apps/extensions installed at >> the same >> time with minimal effort. I am not a programmer and I'm not >> familiar >> with installing things from source and then configuring >> settings. After >> the Python(x,y) install, I went to QGIS and started again and >> tried to >> install the plugin. I got the same error message. Please tell >> me what I >> need to do to get this backend installed in order to get the >> QGIS plugin >> I want. >> >> John Polo >> >> >> ------------------------------------------------------------------------------ >> Dive into the World of Parallel Programming. The Go Parallel >> Website, >> sponsored by Intel and developed in partnership with Slashdot >> Media, is your >> hub for all things parallel software development, from weekly >> thought >> leadership blogs to news, videos, case studies, tutorials and >> more. Take a >> look and join the conversation now. >> http://goparallel.sourceforge.net/ >> _______________________________________________ >> Matplotlib-users mailing list >> Mat...@li... >> <mailto:Mat...@li...> >> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> >> > > |
