10:48 p.m.
Hi,
following Allin's call for suggestions, I'm attaching an example how it
could actually be useful to call Python from gretl. (I'm attaching
rather than pasting it to hopefully preserve the indentation for
Python.) This uses matplotlib's stackplot wich produces a stacked area
plot. I think you need the recent matplotlib version 1.2 for this.
Currently this cannot work out-of-the-box yet at least under Python 3
for the reason explained in the other email. It could work with Python
2, but I couldn't test this so far.
cheers,
sven
1:57 p.m.
Currently this cannot work out-of-the-box yet at least under Python 3
for the reason explained in the other email. It could work with Python
2, but I couldn't test this so far.
Well, to add a remark myself: there is one python-3 idiom in there,
namely the new 'print' usage (function instead of statement). AFAIK this
should also work in Python 2.7, but probably not in earlier versions.
-sven
7:42 p.m.
On Sat, 2 Mar 2013, Sven Schreiber wrote:
following Allin's call for suggestions, I'm attaching an
example how it
could actually be useful to call Python from gretl. (I'm attaching
rather than pasting it to hopefully preserve the indentation for
Python.) This uses matplotlib's stackplot wich produces a stacked area
plot. I think you need the recent matplotlib version 1.2 for this.
Works fine here, thanks. It would be nice, though, if the plot
were to display somehow instead of just being written to file
in the background.
Allin
8:50 p.m.
Am 03.03.2013 20:42, schrieb Allin Cottrell:
On Sat, 2 Mar 2013, Sven Schreiber wrote:
> following Allin's call for suggestions, I'm attaching an example how it
> could actually be useful to call Python from gretl. (I'm attaching
> rather than pasting it to hopefully preserve the indentation for
> Python.) This uses matplotlib's stackplot wich produces a stacked area
> plot. I think you need the recent matplotlib version 1.2 for this.
Works fine here, thanks. It would be nice, though, if the plot
were to display somehow instead of just being written to file
in the background.
Ok, try this instead, I hope it should work on most python distributions
(not all backends are necessarily available even when python+numpy+mpl
are installed).
Actually, I'm not a matplotlib expert, and the reason is basically...
gretl! There was a time when some graph manipulations were difficult or
impossible in gretl (low-level gnuplot hacking aside), and I started
learning mpl. But you listened to users' demands and made some crucial
things possible and/or easy to do, and that's why I haven't used mpl a
lot. But relax -- you don't have to implement stacked area charts now in
gretl :-)
cheers,
sven
3:54 p.m.
On Sun, 3 Mar 2013, Sven Schreiber wrote:
Am 03.03.2013 20:42, schrieb Allin Cottrell:
> On Sat, 2 Mar 2013, Sven Schreiber wrote:
>
>> following Allin's call for suggestions, I'm attaching an example how it
>> could actually be useful to call Python from gretl. (I'm attaching
>> rather than pasting it to hopefully preserve the indentation for
>> Python.) This uses matplotlib's stackplot wich produces a stacked area
>> plot. I think you need the recent matplotlib version 1.2 for this.
>
> Works fine here, thanks. It would be nice, though, if the plot
> were to display somehow instead of just being written to file
> in the background.
Ok, try this instead, I hope it should work on most python distributions
(not all backends are necessarily available even when python+numpy+mpl
are installed).
Nice, the graph displays fine here.
Actually, I'm not a matplotlib expert, and the reason is
basically...
gretl! There was a time when some graph manipulations were difficult or
impossible in gretl (low-level gnuplot hacking aside), and I started
learning mpl. But you listened to users' demands and made some crucial
things possible and/or easy to do, and that's why I haven't used mpl a
lot. But relax -- you don't have to implement stacked area charts now in
gretl :-)
Though that might be a nice exercise for a function package.
Gnuplot has the "filledcurve" plotting style which could do
the job.
Allin
11:09 a.m.
Am 04.03.2013 16:54, schrieb Allin Cottrell:
Though that might be a nice exercise for a function package.
Gnuplot has the "filledcurve" plotting style which could do
the job.
Good idea -- I have attached a file with a function that seems to work
ok, just run the script to see the example.
The function uses a temp file to write out the gnuplot command and then
run it because it seems to be quite difficult to construct the relevant
command string with string substitution etc. internally. Although you
are probably going to point out that it should work just the same with
sprintf as with printf.
A problem is that as soon as you try to change something about the graph
(font size etc.) within gretl, the filled areas are reset to pure lines,
so it's a take-it-or-leave it deal so far. Nevertheless, since I
typically just change the fonts and linewidths for the PDF export, it's
already quite usable for me.
cheers,
sven
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