R – reading tabular data files

commandline session

> dfrm <- read.table("first.txt",sep="-")
> print(dfrm
dfrm
> print(dfrm)
    V1      V2
1 Name Jeffrin
2  Age      35
3  Sex    Male
> dfrm <- read.table("first.txt",sep=" ")
> print(dfrm)
            V1
1 Name-Jeffrin
2       Age-35
3     Sex-Male
> dfrm <- read.table("first.txt",sep=".")
> print(dfrm)
            V1
1 Name-Jeffrin
2       Age-35
3     Sex-Male
> class(dfrm$V1)
[1] "factor"
> class(dfrm$V1)
[1] "factor"
> class(dfrm$V2)
[1] "NULL"
> class(dfrm$V3)
[1] "NULL"
>

$ 4.2.20 6 506---> cat first.txt
Name-Jeffrin
Age-35
Sex-Male
$ 4.2.20 7 507--->

R – package installation

Get The Hang

> install.packages(c("Rpad"))
Installing package(s) into ‘/usr/local/lib/R/site-library’
(as ‘lib’ is unspecified)
--- Please select a CRAN mirror for use in this session ---
Loading Tcl/Tk interface ... done
trying URL 'http://ftp.iitm.ac.in/cran/src/contrib/Rpad_1.3.0.tar.gz'
Content type 'application/x-gzip' length 1745840 bytes (1.7 Mb)
opened URL
==================================================
downloaded 1.7 Mb

* installing *source* package ‘Rpad’ ...
** package ‘Rpad’ successfully unpacked and MD5 sums checked
** R
** inst
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded

* DONE (Rpad)

The downloaded source packages are in
	‘/tmp/Rtmp75RiAi/downloaded_packages’
>

R "version" through web related.

Get The Hang

$ 4.2.20 4 504---> cat ntest.R
cat("n")
for(i in 1:length(version)) {
print(version[i])
cat("
") } cat("n") $ 4.2.20 5 505--->
R – reading tabular files

commandline session

> test <- read.table("first.txt")
> print(test)
    V1      V2
1 Name Jeffrin
2  Age      35
3  Sex    Male
> version
               _
platform       x86_64-pc-linux-gnu
arch           x86_64
os             linux-gnu
system         x86_64, linux-gnu
status
major          2
minor          15.1
year           2012
month          06
day            22
svn rev        59600
language       R
version.string R version 2.15.1 (2012-06-22)
nickname       Roasted Marshmallows
>
Save workspace image? [y/n/c]: y
$ 4.2.20 2 502---> cat first.txt
Name Jeffrin
Age  35
Sex  Male
$ 4.2.20 3 503--->

R – loading libraries and data related

Get The Hang

> library(ggplot2)
Error in library(ggplot2) : there is no package called ‘ggplot2’
> library(ggplot2)
Loading required package: reshape
Loading required package: plyr

Attaching package: ‘reshape’

The following object(s) are masked from ‘package:plyr’:

    rename, round_any

Loading required package: grid
Loading required package: proto
>

find – regex for listing ugly file names

$ 4.2.20 27 525---> find . -regex  '.*[^-_./0-9a-zA-Z ].' 
./xfonts-utils-7.6+1
./.wine/dosdevices/d::
./url?sa=t
./.java/.userPrefs/_!':!bw"t!#4!}@"w!(@!}@"u!'%!.g"k!')!.g"p!'@!~@!t!'k!~!==
./Calibre Library/Jonas Mari[PleaseinsertPrerenderUnicode{A__}intopreamble]n
$ 4.2.20 28 526--->




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