4:16 p.m.
Here's some more news about developments in gretl's graphing
capabilities, in CVS and the Windows snapshot. I'd encourage
people to test the new things and report any problems.
* Color selection. We now distinguish between (a) choice of a
color "palette" for graphs in general, and (b) ad hoc choice of
colors for lines/points in a particular graph. There's a new tab
labeled "Palette" in the GUI graph controller. If you make
changes there, they will be remembered from session to session and
will affect all subsequent graphs. And under the "Lines" tab in
the controller you have a color button for each line: use this to
make changes for the current graph only. (This requires gnuplot
4.2 or higher).
* Adding and removing user-defined lines. Under the lines tab
(for some sorts of graphs) you have an "Add line" button to add a
line defined by a formula. Once such a line is added, you then
get a "Remove" button to remove it. The added line will have a
solid/dotted selector. This is a limited first stab: it turns out
it is easy to define a line as black dots in gnuplot, and that's
what the "dotted" selection does (and so it disables the color
selector for the added line). A more full-featured selector may
follow.
* Choosing point types. For lines defined by data-points, if you
select the "points" or "linespoints" style (GUI controller,
"Lines" tab), you can then select the specific point-type from a
drop-down list (cross, square, diamond, etc.).
* Boxplots. These used to be handled via native gretl code, but
now they have been handed over to gnuplot, using gnuplot's
"candlesticks" style. If you create a boxplot, clicking on the
plot now shows the full range of options that are available for
other sorts of graph. You can invoke the GUI controller to edit
the plot.
--
Allin Cottrell
Department of Economics
Wake Forest University
2:43 p.m.
The plotting functionality looks very neat with the latest
improvements. I have spotted some weird behavior though:
1)- I got problems using "," as the decimal point. That is, if I enter
"3,5" the program draws two horizontal lines at 3 and 5 without any
warning or error message.
2)- The graphs are usually rescaled very nicely depending on the
newly added lines except the horizontal lines. For example, if 5 is
out of bounds of the y axis, adding y=5 expands the graph to 5 but
then of course the line is invisible because it is overlapping with
the frame.
3)- I kept adding lines to the same plot and the program stopped
adding an automatic legend after line 29. What is more, now I cannot
have any legends in new plots. They don't show up even if I enter
something manually.
4)- Regarding the above, I think there must be a maximum number of
lines that can be added. 8 sounds like a good number to me. If you
decide to set it at 8, then it would be a good idea to set the number
of colors in the palet tab at 8 also. This way, the palette tab would
look less empty as well.
5)- In the labels tab, there used to be an "add label" button no? At
any rate, I think it would be nice to have an "add label" button with
a corresponding remove button once added.
Again thanks very much for the much improved plotting interface. This
is already more than what I needed initially and definitely adds to
gretl's overall polish.
Cheers
Talha
I was using Gujarati Table_1.3.gdt and a plot of Canada versus France.
On Wed, Oct 29, 2008 at 6:16 PM, Allin Cottrell <cottrell(a)wfu.edu> wrote:
Here's some more news about developments in gretl's graphing
capabilities, in CVS and the Windows snapshot. I'd encourage
people to test the new things and report any problems.
* Color selection. We now distinguish between (a) choice of a
color "palette" for graphs in general, and (b) ad hoc choice of
colors for lines/points in a particular graph. There's a new tab
labeled "Palette" in the GUI graph controller. If you make
changes there, they will be remembered from session to session and
will affect all subsequent graphs. And under the "Lines" tab in
the controller you have a color button for each line: use this to
make changes for the current graph only. (This requires gnuplot
4.2 or higher).
* Adding and removing user-defined lines. Under the lines tab
(for some sorts of graphs) you have an "Add line" button to add a
line defined by a formula. Once such a line is added, you then
get a "Remove" button to remove it. The added line will have a
solid/dotted selector. This is a limited first stab: it turns out
it is easy to define a line as black dots in gnuplot, and that's
what the "dotted" selection does (and so it disables the color
selector for the added line). A more full-featured selector may
follow.
* Choosing point types. For lines defined by data-points, if you
select the "points" or "linespoints" style (GUI controller,
"Lines" tab), you can then select the specific point-type from a
drop-down list (cross, square, diamond, etc.).
* Boxplots. These used to be handled via native gretl code, but
now they have been handed over to gnuplot, using gnuplot's
"candlesticks" style. If you create a boxplot, clicking on the
plot now shows the full range of options that are available for
other sorts of graph. You can invoke the GUI controller to edit
the plot.
--
Allin Cottrell
Department of Economics
Wake Forest University
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"Remember not only to say the right thing in the right place, but far
more difficult still, to leave unsaid the wrong thing at the tempting
moment." - Benjamin Franklin (1706-1790)
--
8:02 p.m.
On Thu, 30 Oct 2008, Talha Yalta wrote:
The plotting functionality looks very neat with the latest
improvements.
Thanks.
I have spotted some weird behavior though:
1)- I got problems using "," as the decimal point. That is,
if I
enter "3,5" the program draws two horizontal lines at 3 and 5
without any warning or error message.
You can't use ',' as decimal point in this context (as it says in
the context help for adding a variable). I decided that
attempting to filter the user's formula was too error-prone, so
you're talking to gnuplot, and ',' does not signify the decimal
point in gnuplot.
2)- The graphs are usually rescaled very nicely depending on the
newly added lines except the horizontal lines. For example, if 5
is out of bounds of the y axis, adding y=5 expands the graph to
5 but then of course the line is invisible because it is
overlapping with the frame.
You have the option of visiting the "axis" tab and adjusting the
range if need be.
3)- I kept adding lines to the same plot and the program stopped
adding an automatic legend after line 29. What is more, now I
cannot have any legends in new plots. They don't show up even if
I enter something manually.
Ah, yes, there should be limit on how many lines can be added.
I'll try to determine what's a practical maximum.
5)- In the labels tab, there used to be an "add label"
button
no?
No, it seemed that 3 labels should be enough for most purposes.
It might be worth allowing more, but it seems to me a low
priority.
Allin Cottrell
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