Hello Tiago,
I had a same memory problem. To solve this problem, I installed -savesome- command. It is very useful when you want to save data only for a particular variable or within some observations. Once you save the relevant data in different files, you can finally recall all the files into one file by using -joinby- function. It saved a lot of memory space for me.
For example
savesome variable in 1/5 using xyz1
savesome variable in 1/5 using xyz2...
and finally
clear
....
forvalues z=1/.. {
joinby variable using xyz`z', unmatched(both)
drop _merge
}
Hope it helps you.
Regards
Kartick
>>> <[email protected]> 16/11/2007 3:51 p.m. >>>
Dear Statalisters,
Due to problems with memory, I would like to know if it is possible to
append a dataset only using a specific observation.
For example, suppose we have the following datasets:
DATASET 01
variable1
1
2
3
4
5
6
DATASET 02
variable1
4
45
12
56
28
The objective is to add to dataset 01 only one out of 5 observations of
dataset 02 without creating a tempfile.
I am trying to implement tests used in genetics, in which each column is a
sequence of DNA, coded as 0,1,2 and 3. It seems that Stata cannot handle
well with such tests, since all memmory is rapidly consumed (~1 GB for a
relatively short segment of DNA analyzed for 10 or more subjects). Why
does Stata load everything into memory?
All the best,
Tiago
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