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...@mail.usf.edu
<mailto:jp...@mail.usf.edu>> 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
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