Difference between revisions of "Getting Started with R"
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=Some Commands= | =Some Commands= | ||
==Misc== | |||
<pre> | <pre> | ||
read.table(filename,header=TRUE) # Read tab or space delimited file with a header | data <- read.table(filename,header=TRUE) # Read tab or space delimited file with a header | ||
read.table(filename,header=TRUE,sep=',') # Read csv files with a header | csv_data <- read.table(filename,header=TRUE,sep=',') # Read csv files with a header | ||
v1 <- c(1,2,3,4,5,6,7) # Create a vector from these values | |||
v2 <- c(1:10) # Create a vector from 1 to 10 | |||
v3 <- c(v1,v2) # Concatenate the vectors | |||
matrix1 <- cbind(v1,v2) # Column bind into a 2 x n matrix | |||
v2 | |||
ls # List objects | |||
</pre> | |||
==Mean, SD, etc.== | |||
<pre> | |||
> sapply(h, length) | |||
WList_Len | |||
4599 | |||
> sapply(h, mean) | |||
WList_Len | |||
15.6845 | |||
> sapply(h, sd) | |||
WList_Len | |||
15.74873 | |||
> | |||
</pre> | </pre> | ||
Revision as of 12:21, 17 September 2013
Some Commands
Misc
data <- read.table(filename,header=TRUE) # Read tab or space delimited file with a header csv_data <- read.table(filename,header=TRUE,sep=',') # Read csv files with a header v1 <- c(1,2,3,4,5,6,7) # Create a vector from these values v2 <- c(1:10) # Create a vector from 1 to 10 v3 <- c(v1,v2) # Concatenate the vectors matrix1 <- cbind(v1,v2) # Column bind into a 2 x n matrix ls # List objects
Mean, SD, etc.
> sapply(h, length)
WList_Len
4599
> sapply(h, mean)
WList_Len
15.6845
> sapply(h, sd)
WList_Len
15.74873
>
Some Links
- http://www.r-tutor.com/elementary-statistics/numerical-measures/mean
- http://stat.ethz.ch/R-manual/R-patched/library/stats/html/median.html
- http://www.cyclismo.org/tutorial/R/index.html
- http://answers.oreilly.com/topic/2597-how-to-compute-basic-statistics-with-r/