CODEWITHSUNDEEP
r
Justin Carrey
Justin Carrey

Reputation: 3851

y as a function of x in R

I have a complex function of y in terms of x as below 

y = 1-(e^(-((x^2)/730)))

or y equals 1-(e power minus (x-square/730))

How do i represent such complex functions in R? I want to draw a curve(graph) connecting all these points. I also want to mark x-axis from 0 to 370 with interval of 10. I know how to keep the breaks, but i don't know how i can label axes with numbers. If help is given somewhere, please guide me to that link. Much appreciated.

Upvotes: 0

Views: 396

Answers (1)

Ben Bolker
Ben Bolker

Reputation: 226692

Check out the help for ?curve, ?axis ...

## draw the curve
curve(1-exp(-x^2/730),from=0,to=370,axes=FALSE)
axis(side=2)  ## add default lefthand axis
axis(side=1,at=seq(0,370,by=10))  ## add custom bottom axis
box(bty="l")  ## add a box

One thing to note is that R suppresses overlapping labels, so unless you have a very wide plot you won't actually see every axis label. You can try adding cex.axis=0.5 (or even smaller) to your side-1 axis if you like. You could also check out the staxlab function from the plotrix package, or rotate the axis labels. (You had a lot of superfluous parentheses in your expression; more parentheses don't really hurt, but in the long run you can make cleaner code (and spend less time counting parentheses) if you learn the order of operations.)

enter image description here

Upvotes: 4

Related Questions