Re: [Gretl-users] 2 questions
On Mon, 6 Jun 2011, Leandro Zipitria wrote:
If I am working with a restricted version of a variable (using smpl
--restrict), the mean, standard deviation, etc. reported is for the
variable as a whole or just the restricted sample?
Just the restricted sample. Example:
gretl version 1.9.5cvs
Copyright Ramu Ramanathan, Allin Cottrell and Riccardo "Jack" Lucchetti
This is free software with ABSOLUTELY NO WARRANTY
Current session: 2011-06-06 21:11
"help" gives a list of commands
Type "open filename" to open a data set
? open data4-1
open data4-1
Read datafile /usr/local/share/gretl/data/data4-1.gdt
periodicity: 1, maxobs: 14
observations range: 1-14
Listing 5 variables:
0) const 1) price 2) sqft 3) bedrms 4) baths
? m = mean(sqft)
m = mean(sqft)
Generated scalar m = 1910.93
? smpl 2 10
smpl 2 10
Full data range: 1 - 14 (n = 14)
Current sample: 2 - 10 (n = 9)
? m = mean(sqft)
m = mean(sqft)
Replaced scalar m = 1670.44
As a second answer, I am creating a doble loop for iterating mean and
standar deviation from a variable. I want to create a matix that store
the results of each calculation. That is, I have a panel, and want to
restrict it looping on one variable (city) which will be the columns,
and the time the rows. Each time gretl compute one statistic, I am
trying to store it in the matrix, following the previous order. Is this
possible?
Yes it is. That said, I'm not at all sure to have understood what your
need is, but I have the feeling that you can write a much more efficient
script by using the pmean() and psd() function. Also, the user's guide is
your friend.
Riccardo (Jack) Lucchetti
Dipartimento di Economia
Università Politecnica delle Marche
r.lucchetti(a)univpm.it
http://www.econ.univpm.it/lucchetti