[GRASS-dev] Wildcards in multiple map input?

[Anna Petrášová]

On Thu, Sep 10, 2015 at 10:07 AM, Blumentrath, Stefan <
Stefan.Blumentrath at nina.no> wrote:

> Hi Anna,
>
>
>
> Thanks for your reply. The closest I found was this:
>
> https://trac.osgeo.org/grass/ticket/1251
>

that's a different one... Maybe I don't remember it correctly

>
>
> Might be dangerous to use an asterisk at command / parser level as the
> result of the evaluation (meaning the resulting list of maps) is not
> necessarily known to the user in advance (or may be different from what he
> or she expects)!?
>
>
>
> Anyway, if you consider it a useful feature I will open a ticket …
>

yes, thanks

>
>
> Cheers
>
> Stefan
>
>
>
>
>
> *From:* Anna Petrášová [mailto:kratochanna at gmail.com]
> *Sent:* 10. september 2015 15:44
> *To:* Blumentrath, Stefan <Stefan.Blumentrath at nina.no>
> *Cc:* GRASS developers list (grass-dev at lists.osgeo.org) <
> grass-dev at lists.osgeo.org>; Andrew McAninch <amcaninch at gmail.com>; Radim
> Blazek (radim.blazek at gmail.com) <radim.blazek at gmail.com>
> *Subject:* Re: [GRASS-dev] Wildcards in multiple map input?
>
>
>
>
>
>
>
> On Wed, Sep 9, 2015 at 7:06 AM, Blumentrath, Stefan <
> Stefan.Blumentrath at nina.no> wrote:
>
> Hi,
>
>
>
> For the QGIS-GRASS-plugin update Radim, Pedro, Andrew and me were
> discussion how to implement multiple selections for map input in the UI in
> QGIS.
>
>
>
> In this context I was thinking that the ability to use wildcards would be
> really handy for GRASS newcomers. People who are not afraid of the command
> line can of course easily pipe g.list output to modules with multiple input
> or re-use the latter from file like e.g. in temporal modules.
>
>
>
> My idea would be to allow something like this:
>
> r.series input=temperature_*_05_17
> output=norway_national_day_temperature_avg method=average (in order to
> calculate average temperature for Norways national day for example)
>
> in the GUI and/or command line, where wildcards are evaluated to a list of
> available maps following that pattern.
>
> The “*” is not allowed in map names, right, so, whenever it appears in a
> multiple map input it might used to trigger a respective g.list operation…
>
>
>
> My question is:
>
> Would it be of interest and feasible to add such a feature to GRASS?
>
> Just an idea to make things easier for beginners and those who only use
> the GUI...
>
>
>
> I thought there was a ticket about this, but I can't find it. The
> suggestion I remember (but it never got implemented) is to reuse a dialog
> for selecting multiple maps using regular expressions (accessible from
> layer manager) and have a small button near the map entry in the
> autogenerated dialogs which would open this dialog and transfer the
> resulting map series back in the map entry field. So this would be
> implemented on the GUI level. Your suggestion would be implemented on
> parser level. I guess both have some pluses and minuses.
>
>
>
> Anna
>
>
>
>
>
>
>
> Cheers
>
> Stefan
>
>
>
>
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