hello,

> subset(swiss, Agriculture > 60 & Examination != c(14,16), select = c(Agriculture,Examination,Catholic))
             Agriculture Examination Catholic
Broye               70.2          16     3.30
Glane               67.8          14     4.20
Aigle               62.0          21     5.16
Avenches            60.7          19     5.23
Cossonay            69.3          22     5.62
Echallens           72.6          18     6.10
Lavaux              73.0          19     9.96
Oron                71.2          12    16.92
Paysd'enhaut        63.5           6    24.20
Conthey             85.9           3    58.33
Entremont           84.9           7    84.84
Herens              89.7           5    90.57
Martigwy            78.2          12    91.38
Monthey             64.9           7    92.85
St Maurice          75.9           9    93.40
Sierre              84.6           3    96.83
Sion                63.1          13    97.16
Warning message:
la longueur de l'objet le plus long
        n'est pas un multiple de la longueur de l'objet le plus court in: Examination != c(14, 16) 

As this example shows I'd like to know if it's possible to drop several lines for example here to drop severals lines from Examination
thanks


      
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