[Qgis-user] Distance calculation Matrix

[Jonathan Moules]

Hi Sergio,
I ended up getting the SAGA one to work by re-starting QGIS.

The one you're referencing was the first I tried and gave me either no
output or any indication anything had been done, or a Python error.
Apparently it has been fixed in master though.
Thanks,
Jonathan


On 20 November 2013 12:08, Sergio Vignali <vignalisergio30 at gmail.com> wrote:

> Hi Jonathan,
> there is another tool,
> did you try with Vector -> Analysis Tools -> Distance matrix?
>
> Regards
>
>
> 2013/11/20 Jonathan Moules <jonathanmoules at warwickshire.gov.uk>
>
>>  Hi List,
>> I have a collection of ~2,500 points in British National Grid. I want to
>> calculate the distance between all of them to all of them.
>> QGIS 2 has two tools for this as best I can tell:
>>
>> Processing -> "Distance matrix"
>> Results:
>>
>> - "Linear" matrix type: Nothing happens whatsoever. No errors, no
>> outputs, nothing. The dialog just disappears.
>>
>> - "Standard" matrix type: I get a wall of Python error message:
>>
>>> Traceback (most recent call last):
>>> File
>>> "C:/PROGRA~1/QGISDU~1/apps/qgis/./python/plugins\processing\core\GeoAlgorithm.py",
>>> line 150, in execute
>>> self.processAlgorithm(progress)
>>> File
>>> "C:/PROGRA~1/QGISDU~1/apps/qgis/./python/plugins\processing\algs\ftools\PointDistance.py",
>>> line 98, in processAlgorithm
>>> self.regularMatrix(inLayer, inField, targetLayer, targetField, nPoints,
>>> progress)
>>> File
>>> "C:/PROGRA~1/QGISDU~1/apps/qgis/./python/plugins\processing\algs\ftools\PointDistance.py",
>>> line 178, in regularMatrix
>>> data.append(unicode(outFeat.attributes[outIdx]))
>>> TypeError: 'builtin_function_or_method' object has no attribute
>>> '__getitem__'
>>
>>
>>  Summary: Absolutely nothing happens again
>>
>>
>> =========
>> There's also a SAGA tool "Distance matrix". With this one I get an error
>> like:
>>
>>  The following output layers could not be open
>>> Distance Matrix Table:
>>> C:\Users\jmou1\AppData\Local\Temp\processing\cb88ea8b51994f1cbfe5549465bc949f\TABLE.csv
>>
>>
>> Despite it being a location I can write to. That's using the temporary
>> output. If I specify an output location myself, I get the same error.
>>
>>
>> So basically, it's not working; can anyone advise what I'm doing wrong?
>> How do I use these tools? I've got three different failure modes here,
>> which isn't very encouraging.
>>
>> Cheers,
>> Jonathan
>>
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>
>
>
> --
> Sergio Vignali
>
>

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