Re: [Gretl-users] Simple Data Problem - Person-Year
On Fri, 1 Feb 2013, Daniel Hanson wrote:
I'm brand new to using Gretl, but have lots of experience with
Stata, SAS,
and R. I'm trying to use Gretl to do something pretty easy, but can't seem
to make it do what I want.
Basically, I have a person-year data file such that each observation
consists of a person in a given year. I'd like to be able to plot summary
statistics by year or person for a person-year data set.
In other words, if my data file was:
Person,Year,Height,Weight
1,1990,60,150
2,1990,62,160
1,1991,61,170
2,1991,63,180
I'd like to plot Year on the X-axis and Height on the Y-axis, but plot the
yearly average as a line (I.e., point A=(1990,61); point B=(1991,62)).
With more extensive data, I'd like to add in lines for standard deviation,
etc.
On the basics, here's an example (hansl being gretl's scripting
language):
<hansl>
series avgheight
loop i=1990..1991
smpl Year==i --restrict --replace
avgheight = mean(Height)
endloop
smpl --full
gnuplot avgheight Year --output=display
</hansl>
Allin Cottrell