<div dir="ltr">No, that's not the idea off ##passfilename, the idea is that, instead of getting an R variable that is already a vector/raster layer, you get a string with its filename, so you can use it in R as you like. This was mainly done to allow the user to open a raster layer using a different package, and not use a fixed one and provide the layer object directly. So, if you declare a variable "mylayer" as vector layer, Processing will ask the user to select a vector layer, but the "mylayer" variable will have the path to the selected file. If you do not use ##passfilename, Processing will add some extra code, so the variable will already point to a data object created based on that filename.<div>
<br></div><div>You can update to the newer version using the plugin manager. You should enable the "show experimental plugins" option, and you will see a new version of Processing.</div><div><br></div><div>To make feature requests, you can use the QGIS issue tracker.</div>
<div><br></div><div>Thanks in advance!</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-02-11 22:51 GMT+01:00 Ned Horning <span dir="ltr"><<a href="mailto:horning@amnh.org" target="_blank">horning@amnh.org</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<div>Hi Victor - <br>
<br>
Yes, I am using the version of Processing that comes with QGIS
2.0.1.<br>
<br>
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. <br>
<br>
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.<br>
<br>
All the best,<br>
<br>
Ned<div><div class="h5"><br>
<br>
On 02/11/2014 04:41 PM, Victor Olaya wrote:<br>
</div></div></div><div><div class="h5">
<blockquote type="cite">
<div dir="ltr">Hi Ned
<div><br>
</div>
<div>That looks like a bug when parsing the script code. I will
check to see what I can do.</div>
<div><br>
</div>
<div>Are you using the latest version of Processing, or the one
that comes with QGIS 2.0.1?</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">2014-02-10 23:03 GMT+01:00 Ned Horning
<span dir="ltr"><<a href="mailto:horning@amnh.org" target="_blank">horning@amnh.org</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi -<br>
<br>
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?<br>
<br>
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.<br>
<br>
All the best,<br>
<br>
Ned<br>
<br>
<br>
I'm running QGIS 2.0.1 on Ubuntu 12.04. This is the error
message:<br>
--<br>
An error has occured while executing Python code:<br>
<br>
Traceback (most recent call last):<br>
File "/usr/share/qgis/python/plugins/processing/r/EditRScriptDialog.py",
line 95, in runAlgorithm<br>
alg = RAlgorithm(None, unicode(self.text.text()))<br>
File "/usr/share/qgis/python/plugins/processing/r/RAlgorithm.py",
line 71, in __init__<br>
self.defineCharacteristicsFromScript()<br>
File "/usr/share/qgis/python/plugins/processing/r/RAlgorithm.py",
line 82, in defineCharacteristicsFromScript<br>
self.parseDescription(iter(lines))<br>
File "/usr/share/qgis/python/plugins/processing/r/RAlgorithm.py",
line 108, in parseDescription<br>
raise WrongScriptException("Could not load R script:" +
self.descriptionFile + ".\n Problem with line \"" + line +
"\"")<br>
TypeError: cannot concatenate 'str' and 'NoneType' objects<br>
<br>
Python version:<br>
2.7.3 (default, Sep 26 2013, 20:13:52)<br>
[GCC 4.6.3]<br>
<br>
<br>
QGIS version:<br>
2.0.1-Dufour Dufour, exported<br>
<br>
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']<br>
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<br>
</div>
</blockquote>
<br>
</div></div></div>
</blockquote></div><br></div>