CODEWITHSUNDEEP
rdata-visualizationmeanmaxminimum
stevebyers2000
stevebyers2000

Reputation: 1

How to plot minimum, maximum, and mean in r

I've been reading how to plot points in r, but can't find anything that matches my problem. My data is a matrix; the rows start with a column called 'site' and it is followed by three columns containing the parameters: minimum, mean, and maximum. There are four rows in the matrix, corresponding to 4 sites.

What I want is a graph that has the 4 sites on the x-axis and the three data points (min, mean max) above each site, connected by a line. The mean would be represented by a circle, while the min and max by a cross bar. Each of the means would be connected by a line. My output would look like a boxplot without the boxes and with a line connecting the means.

Can anyone help me? It seems like a simple problem but I'm stumped.

Upvotes: 0

Views: 2562

Answers (1)

Stephan Kolassa
Stephan Kolassa

Reputation: 8267

Define a random matrix:

set.seed(1)

n_sites <- 4

myMatrix <- cbind(t(replicate(n_sites,sort(rnorm(3)))),1:n_sites)
dimnames(myMatrix) <- list(paste("Site",1:n_sites),c("Min","Mean","Max","n"))

Plot:

plot(c(1,n_sites),range(myMatrix),type="n",xlab="",ylab="",xaxt="n",las=1)
axis(1,1:n_sites,rownames(myMatrix))
arrows(x0=1:n_sites,y0=myMatrix[,"Min"],x1=1:n_sites,y1=myMatrix[,"Max"],angle=90,code=3,length=0.1)
points(1:n_sites,myMatrix[,"Mean"],bg="white",pch=21,type="o")
text(1:n_sites,myMatrix[,"Max"],myMatrix[,"n"],pos=3)

plot

I like using arrows() in cases like this.

Upvotes: 1

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