[R] subset with two factors
Martin Spindler
Martin.Spindler at gmx.de
Fri Dec 10 12:25:13 CET 2010
Dear all,
I have a dataframe of the following strucutre
numacc_b coverage_b Geschlecht GG
1 0 1 W A
2 0 1 M A
3 0 1 M B
4 0 1 M B
5 0 1 W A
6 0 1 M B
I would like to form a subset consisting of all entries with Geschlecht=M and GG=A.
Using
>T1 <- subset(daten1, Geschlecht=="M", GG=="A")
delievers
data frame with 0 columns and 6 rows
> T1 <- subset(daten1, Geschlecht=="M")
delievers
numacc_b coverage_b Geschlecht GG
2 0 1 M A
3 0 1 M B
4 0 1 M B
6 0 1 M B
9 0 1 M B
10 0 1 M B
But I want to select the dataframe according to both factos.
What can I do?
Thank you answers in advance!
Best,
Martin
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