[R] Help on conditional selection of data.frame data...
istazahn at gmail.com
Mon Feb 4 16:50:55 CET 2013
Look at the help page for ?Logic, and in particular the section that
describes "&" and "|".
On Mon, Feb 4, 2013 at 9:01 AM, skpark <birdfire94 at naver.com> wrote:
> I have trouble with using data.frame data.
> 1. I loaded data using the following:
> ff <- read.table("E:/R/VM/matrix.txt", header=T)
> The data I used is attached.
> I want to use at least 2 conditions for selecting of data. But I failed.
> It works. ->
> fff <- ff[ff$HG == "GUEST",]
> ffff <- fff[fff$WR == "READ",]
> But it doesn't work -> ff[ff$HG == "GUEST",ff$WR=="READ"]
> How can I use 2 or more conditions together in one sentence ?
> 2. I want to plot Throuput data using BlockSize as x-axis like the following:
> plot(ffff$BlockSize, ffff$Throughput, type="o")
> But, Gap between 2 axis values are not consistent in the graph.
> So I tried to use log() like the following:
> plot( log(ffff$BlockSize), ffff$Throughput, type="o")
> The problem seems to be fixed.
> But x-axis sting is shown not as (1,2,4,8,16,32,64,128) but as (0,1,2,3,4,5), which is not my intention.
> How can I fix this problem ?
> Thanks in advance,
> SK Park
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
More information about the R-help