[R] removing rows from a dataframe

[Jeff Miller]

    Hi,

    I have a dataframe, hilodata, which looks like this:

> hilodata
    sym         date               maxprice           minprice         ntick
 1  ABK     19910711     11.1867461      0.0000000       108
 2  ABK     19910712     11.5298979     11.1867461      111
 3  ABK     19910715     11.7357889     11.4612675       52
 4  ABK     19910716     11.5298979     11.3240068       51
 5  ABK     19910717     11.4612675     11.1181158       23
 6 CSCO   19910102      0.1553819      0.0000000         106
 7 CSCO   19910103      0.1527778      0.1458333         166
 8 CSCO   19910104      0.1475694      0.1397569         205
 9 CSCO   19910107      0.1414931      0.1362847         164
10 CSCO  19910108      0.1440972      0.1380208         127
11 CSCO  19910109      0.1467014      0.1414931          83
12 CSCO  19910110      0.1440972      0.1414931          70
13  KMP   19991213     40.5625000      0.0000000         63
14  KMP   19991214     41.3125000     40.4375000        71
15  KMP   19991215     42.1875000     41.1875000        99
16  KMP   19991216     43.5000000     42.1250000        96
17  KMP   19991217     43.8750000     42.5625000        77
18  KMP   19991220     44.0000000     43.3750000        56

    I'd like to make a new dataframe, newhilodata, that gets rid of each
symbols first
    row. So, in this example,  I'd like to get rid of rows 1, 6 and 13,
leaving

>  newhilodata
    sym         date               maxprice           minprice         ntick
 2  ABK     19910712     11.5298979     11.1867461      111
 3  ABK     19910715     11.7357889     11.4612675       52
 4  ABK     19910716     11.5298979     11.3240068       51
 5  ABK     19910717     11.4612675     11.1181158       23
 7 CSCO   19910103      0.1527778      0.1458333         166
 8 CSCO   19910104      0.1475694      0.1397569         205
 9 CSCO   19910107      0.1414931      0.1362847         164
10 CSCO  19910108      0.1440972      0.1380208         127
11 CSCO  19910109      0.1467014      0.1414931          83
12 CSCO  19910110      0.1440972      0.1414931          70
14  KMP   19991214     41.3125000     40.4375000        71
15  KMP   19991215     42.1875000     41.1875000        99
16  KMP   19991216     43.5000000     42.1250000        96
17  KMP   19991217     43.8750000     42.5625000        77
18  KMP   19991220     44.0000000     43.3750000        56

    what is the best way to do this in R?


    Thanks much,

            Jeff Miller




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