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