Hi Victor -
Yes, I am using the version of Processing that comes with QGIS 2.0.1.
I played with it some more today and I don't get an error if I use
##passfilenames (I added an "s" at the end) but it still didn't seem to
work. I'm assuming that using ##passfilename will simply declare the
directory path and file name as a variable instead of actually opening
the file. It's quite possible I don't understand the intended
functionality.
Can you let me know the best way to make comments or make feature
requests related to the R scripting capability. I'm glad I finally got
around to trying it out.
All the best,
Ned
On 02/11/2014 04:41 PM, Victor Olaya wrote:
Hi Ned
That looks like a bug when parsing the script code. I will check to
see what I can do.
Are you using the latest version of Processing, or the one that comes
with QGIS 2.0.1?
2014-02-10 23:03 GMT+01:00 Ned Horning <horn...@amnh.org
<mailto:horn...@amnh.org>>:
Hi -
I am trying to learn to write R scripts using the Processing
Toolbox. I have a random forest image classification script that
works in the processing toolkit but I'd like to modify it to do
more complex tasks. I think I need to use the ##passfilename tag
but every time I add that to a script I get an error that I pasted
below. I tried several different scripts and every time I add the
##passfilename tag I get the same error. Does the ##passfilename
tag need other parameters? If anyone knows what the problem might
be or has pointers about how I can find the problem please let me
know?
This R scripting capability has a lot of potential and I'd like to
write a guide on how to use it but I still have a lot to learn myself.
All the best,
Ned
I'm running QGIS 2.0.1 on Ubuntu 12.04. This is the error message:
--
An error has occured while executing Python code:
Traceback (most recent call last):
File
"/usr/share/qgis/python/plugins/processing/r/EditRScriptDialog.py", line
95, in runAlgorithm
alg = RAlgorithm(None, unicode(self.text.text()))
File
"/usr/share/qgis/python/plugins/processing/r/RAlgorithm.py", line
71, in __init__
self.defineCharacteristicsFromScript()
File
"/usr/share/qgis/python/plugins/processing/r/RAlgorithm.py", line
82, in defineCharacteristicsFromScript
self.parseDescription(iter(lines))
File
"/usr/share/qgis/python/plugins/processing/r/RAlgorithm.py", line
108, in parseDescription
raise WrongScriptException("Could not load R script:" +
self.descriptionFile + ".\n Problem with line \"" + line + "\"")
TypeError: cannot concatenate 'str' and 'NoneType' objects
Python version:
2.7.3 (default, Sep 26 2013, 20:13:52)
[GCC 4.6.3]
QGIS version:
2.0.1-Dufour Dufour, exported
Python path: ['/usr/share/qgis/python/plugins/processing',
'/usr/share/qgis/python', '/home/nedhorning/.qgis2/python',
'/home/nedhorning/.qgis2/python/plugins',
'/usr/share/qgis/python/plugins', '/usr/lib/python2.7',
'/usr/lib/python2.7/plat-linux2', '/usr/lib/python2.7/lib-tk',
'/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload',
'/usr/local/lib/python2.7/dist-packages',
'/usr/lib/python2.7/dist-packages',
'/usr/lib/python2.7/dist-packages/PIL',
'/usr/lib/python2.7/dist-packages/gst-0.10',
'/usr/lib/python2.7/dist-packages/gtk-2.0',
'/usr/lib/pymodules/python2.7',
'/usr/lib/python2.7/dist-packages/ubuntu-sso-client',
'/usr/lib/python2.7/dist-packages/ubuntuone-client',
'/usr/lib/python2.7/dist-packages/ubuntuone-installer',
'/usr/lib/python2.7/dist-packages/ubuntuone-storage-protocol',
'/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode',
'/usr/share/qgis/python/plugins/fTools/tools']
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