[R] how to drop rows from a data.frame

[Gabor Grothendieck]

Assuming all the entries are non-negative and non-NA this will do it:

    DF[rowSums(DF) > 0,]



Peter Wilkinson <pwilkinson <at> videotron.ca> writes:

: 
: here is a snippet of data where I would like to drop all rows that have 
: zeros across them, and keep the rest of the rows while maintaining the row 
: names (1,2,3, ...10). The idea here is that a row of zeros is an indication 
: that the row must be dropped. There will never be the case where there is a 
: row(of n columns) with less than 5 zeros in this case(n zeros
: 
: I am unsure how to manipulate the data frame to drop rows whiles keeping 
: row names.
: 
: Peter
: 
: the data (imagine separated by tabs):
: 
:        SEKH0001  SEKH0002 SEKH0003 SEKH0004 SEKH0005
:   [1,] 256.1139  256.1139 256.1139 256.1139 256.1139
:   [2,] 283.0741  695.1000 614.5117 453.0342 500.1436
:   [3,] 257.3578  305.0818 257.3578 257.3578 257.3578
:   [4,]   0.0000    0.0000   0.0000   0.0000   0.0000
:   [5,]   0.0000    0.0000   0.0000   0.0000   0.0000
:   [6,]   0.0000    0.0000   0.0000   0.0000   0.0000
:   [7,]   0.0000    0.0000   0.0000   0.0000   0.0000
:   [8,] 257.0000  257.0000 257.0000 257.0000 257.0000
:   [9,] 305.7857 2450.0417 335.5428 305.7857 584.2485
: [10,]   0.0000    0.0000   0.0000   0.0000   0.0000
: 
: what I want it to look like:
: 
:        SEKH0001  SEKH0002 SEKH0003 SEKH0004 SEKH0005
:   [1,] 256.1139  256.1139 256.1139 256.1139 256.1139
:   [2,] 283.0741  695.1000 614.5117 453.0342 500.1436
:   [3,] 257.3578  305.0818 257.3578 257.3578 257.3578
:   [8,] 257.0000  257.0000 257.0000 257.0000 257.0000
:   [9,] 305.7857 2450.0417 335.5428 305.7857 584.2485