Multiple pattern grep

Question

I have a file (tsm) as below :

V1                                                        V2

Library Name:                                            abc

DriveName:                                               123

Device Type:                                              xyz

WWN:              567

Library Name: feg

DriveName:    124

Device Type:    wef

WWN:   312

I want to get an output with only the drive name followed by wwn.

I have tried , but I get a <0 rows> (or 0-length row.names) message.

> tsm[grep("DriveName | WWN",tsm$V1,fixed = TRUE) , ]
[1] V1 V2
<0 rows> (or 0-length row.names)

What is the expected output? If you need the rows with either DriveName or WWN Try grep("^(DriveName|WWN)", tsm$V1) — akrun
– akrun, Commented Mar 15, 2016 at 7:54
How about removing the space in "DriveName | WWN" or the argument fixed = TRUE? — pe-perry
– pe-perry, Commented Mar 15, 2016 at 7:55
yes removing the space and fixed =true also worked , thanks ! — colin gomes
– colin gomes, Commented Mar 15, 2016 at 8:03

akrun · Accepted Answer · 2016-03-15 07:56:22Z

1

We can try

tsm[grep("^(DriveName|WWN)", tsm$V1),]

answered Mar 15, 2016 at 7:56

akrun

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Comments

etienne · Accepted Answer · 2016-03-16 07:59:00Z

0

I've come across the solution, thanks for the assistance !

tsm[grep(c("WWN|DriveName"),tsm$V1), ]

edited Mar 16, 2016 at 7:59

etienne

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answered Mar 15, 2016 at 7:59

colin gomes

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