my dataset looked like this in the beginning:

>Daten
      V1      V2         V3
1  Dosis Gewicht Geschlecht
2      0    6.62          m
3      0    6.65          m
4      0    5.78          m
5      0    5.63          m

I need box plots for V2 with all combination of V1 and V3, so I deleted the
first row, and tried this:
boxplot(Daten$V2[Daten$V3=="m"])
but it does not work and I have no clue what I did wrong.
I'm thankful for any help!

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