[R] How to delete rows with specific values on all columns (variables)?

IgnacioQM ignacioquinterom at gmail.com
Mon Feb 21 22:03:49 CET 2011


Hi,

I need to filter my data:
I think its easy but i'm stuck so i'll appreciate some help:

I have a data frame with 14 variables and 6 million rows. About half of this
rows have a value of "0" in 12 variables (the other two variables always
have values). How can I delete the rows in which all 12 variables have the
value of "0".

example (from my data, variable 14 is missing):

1783         81      85      78     89     71     97     76     66     88    
95     95     98  -57.48258
1784         81      86      79     90     71     97     77     66     88    
95     95     98  -57.43768
1785         81      86      79     90     71     98     77     66     89    
95     94     98  -57.39278
1786          0       0       0      0      0      0      0      0      0     
0      0      0  -57.34788
1787          0       0       0      0      0      0      0      0      0     
0      0      0  -57.30298
1788         80      86      80     90     72     98     78     66     88    
93     93     96  -57.25808
1789         77      83      78     88     70     95     76     63     86    
91     90     93  -57.21318
1790         77      84      79     89     70     96     76     64     87    
91     90     93  -57.16828

I would need to delete rows 1786 & 1787.

I tried subset with variable1>"0"&variable2>"0", but it wasn't useful 'cause
it only took the rows that didn't have a 0 in any of the variables; I only
need in ALL of the variables simultaneously.

Thanks,

Ignacio

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