R

ggplot2 cheatsheet

examples

> 1+1
[1] 2

>r <- 5
> r
[1] 5
> pi * r^2
[1] 78.53982

>install.packages("ggplot2")

# vector with 'c'omponents (members)
>c(1,2,3)  
[1] 1 2 3

> x <- c(1,2,3)
> x
[1] 1 2 3
> length(x)
[1] 3

# evaluate expression for each element in x:
> y <- 2*x
> y
[1] 2 4 6

> x <- 5
> y <- c(1,2,3)
> x*y
[1]  5 10 15

> a <- 1:10
> a
[1]  1  2  3  4  5  6  7  8  9 10

read more

> a <- read.table("http://www.sr.bham.ac.uk/~ajrs/R/datasets/file.dat", header=T)
> a
  r    x    y
1 1 4.20 14.2
2 2 2.40 64.8
3 3 8.76 63.4
4 4 5.90 32.2
5 5 3.40 89.6

id<-196 data<-read.table(paste(“http://meetjestad.net/data?type=sensors&ids=”,id,”&format=csv”, sep=””), sep=”\t”, header=T) data id timestamp longitude latitude temperature humidity supply 1 196 2017-11-26 16:44:46 0.00000 0.0000 18.1250 48.6875 3.28 2 196 2017-11-26 17:19:50 0.00000 0.0000 18.6875 50.3750 3.29 #…

http://meetjestad.net/data/handleiding.r