[GRASS-dev] r.univar, ERROR G_realloc:

[Pietro]

On Thu, Feb 5, 2015 at 2:48 PM, Markus Neteler <neteler at osgeo.org> wrote:
> Hi Pietro,
>
> (back to an older email)
>
> On Tue, Dec 10, 2013 at 11:38 PM, Pietro Zambelli <peter.zamb at gmail.com> wrote:
>> On Sunday 08 Dec 2013 23:51:22 you wrote:
>>> > It might be nice to define a threshold for "large maps" and issue
>>> > in case a G_message()/G_warning() to inform the user about the
>>> > other modules...
>>>
>>> Today I tried to reduce the memory footprint of the module and I
>>> added also: skewness, kurtosis and mode, and reduced some
>>> capabilities, I will test it in the next days.
>
> we would be interested to have the "mode" calculation in trunk.
>
>> OK, I pushed in grass-addons, at the moment it works only with zones
>> and with the flag -e (for extended statistics).
>>
>> On my test case r.univar consume more than 15 GB before to crash, now
>> the module consume less than GB, and compute also some extra values.
>
> Sounds very good :-)
>
> Do you see a chance to get the changes into trunk?

the module it is already in the grass-addons: r.univar2 [0].

if compared with r.univar in trunk, zones is a required parameter, it
should be not too difficult to modify r.univar2 to use just one zone
if the zones parameter is not provided by the user...

But at the moment I'm quite buisy with my thesis and work... so I'm
not sure to have time to look into it soon (with soon I mean before
April).

Let me know if it is ok for you.

Best regards

Pietro




[0] http://trac.osgeo.org/grass/browser/grass-addons/grass7/raster/r.univar2