11:39 p.m.
On Sat, 23 Apr 2011, Ferenci Tamas wrote:
I was just wondering: is it somehow possible to create a scatter
plot
where markers depend on a categorical (but not dummy, i.e. not binary)
variable? View / Graph specified vars / X-Y with factor separation
looked promising, but it only allows dummy variables as separating
factors, so the points can only be partitioned into two sets. Is it
somehow possible to extend this to more than two...?
It's not a built-in command, but it's not very difficult. Suppose
you have a "treatment" variable x and a "response" variable y, and
you want to plot y against x, with the points distinguished by the
associated value of some discrete variable d. Then:
<script>
matrix dvals = values(d)
nd = rows(dvals)
list yd = null
loop i=1..nd
series y$i = (d == dvals[i]) ? y : NA
yd = yd y$i
endloop
gnuplot yd x --output=display # or whatever option
</script>
Allin Cottrell
5:36 p.m.
New subject: scatter plot with non-binary factor separation
Hello all,
First of all: thank you Allin! It works perfectly, exactly that I was
thinking of. I can even edit the plot gretl-stlye after running the
script, very nice. (And I'm also a bit relieved that not I was missing
a GUI feature for this...) By the way, I really appreciate the way you
help everyone on this list, thank you again!
Just out of curiosity: what is the rationale behind limiting the GUI
to binary variables? Enabling the usage of any discrete variable
would in no way alter the possibility of still using a binary variable
(it would be a fully "backward compatible" change, so to say), and it
also doesn't seem to be too complicated...
Tamás
2011. április 26., 1:39:48, írtad:
On Sat, 23 Apr 2011, Ferenci Tamas wrote:
> I was just wondering: is it somehow possible to create a scatter
plot
> where markers depend on a categorical (but not dummy, i.e. not binary)
> variable? View / Graph specified vars / X-Y with factor separation
> looked promising, but it only allows dummy variables as separating
> factors, so the points can only be partitioned into two sets. Is it
> somehow possible to extend this to more than two...?
It's not a built-in command, but it's not very difficult.
Suppose
you have a "treatment" variable x and a "response" variable y, and
you want to plot y against x, with the points distinguished by the
associated value of some discrete variable d. Then:
<script>
matrix dvals = values(d)
nd = rows(dvals)
list yd = null
loop i=1..nd
series y$i = (d == dvals[i]) ? y : NA
yd = yd y$i
endloop
gnuplot yd x --output=display # or whatever option
</script>
Allin Cottrell
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9:21 a.m.
New subject: scatter plot with non-binary factor separation
El 28/04/11 19:36, Ferenci Tamas escribió:
Hello all,
First of all: thank you Allin! It works perfectly, exactly that I was
thinking of. I can even edit the plot gretl-stlye after running the
script, very nice. (And I'm also a bit relieved that not I was missing
a GUI feature for this...) By the way, I really appreciate the way you
help everyone on this list, thank you again!
Just out of curiosity: what is the rationale behind limiting the GUI
to binary variables? Enabling the usage of any discrete variable
would in no way alter the possibility of still using a binary variable
(it would be a fully "backward compatible" change, so to say), and it
also doesn't seem to be too complicated...
Tamás
I am using Allin's script as well, for a cross-section model and a
discrete variable with three categories. I also vote for extending the
"XY with factor separation" plot to allow for more categories, of course
when our dear developers have time and are bored (no high priority).
--
Ignacio Diaz-Emparanza
DEPARTAMENTO DE ECONOMÍA APLICADA III (ECONOMETRÍA Y ESTADÍSTICA)
UPV/EHU Avda. Lehendakari Aguirre, 83 | 48015 BILBAO
T.: +34 946013732 | F.: +34 946013754
www.ea3.ehu.es
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2 comments
3 participants
participants (3)
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Allin Cottrell -
Ferenci Tamas -
Ignacio Diaz-Emparanza