[R] Sin curve question

[Eric Berger]

Alternatively with base graphics

N <- 500 ## number of points (arbitrary)
degrees <- seq(from=0,to=180,length=N)
degreesToRadians <- function(d) { pi * d / 180.0}  ## vectorIzed!
plot(x=degrees,y=sin(degreesToRadians(degrees)),type='l',
     xlab="x",ylab="sin(x)",main="sin(x) vs x\nx is in degrees")


On Sat, Jul 24, 2021 at 9:52 PM Sorkin, John <jsorkin using som.umaryland.edu>
wrote:

> Try something like the following
>
> copdat$degrees <- c(1:180)
>
> John David Sorkin M.D., Ph.D.
> Professor of Medicine
> Chief, Biostatistics and Informatics
> University of Maryland School of Medicine Division of Gerontology and
> Geriatric Medicine
> Baltimore VA Medical Center
> 10 North Greene Street<x-apple-data-detectors://12>
> GRECC<x-apple-data-detectors://12> (BT/18/GR)
> Baltimore, MD 21201-1524<x-apple-data-detectors://13/0>
> (Phone) 410-605-711<tel:410-605-7119>9
> (Fax) 410-605-7913<tel:410-605-7913> (Please call phone number above prior
> to faxing)
>
> On Jul 24, 2021, at 2:41 PM, Thomas Subia via R-help <r-help using r-project.org>
> wrote:
>
> Colleagues,
>
> Here is my code which plots sin(x) vs x, for angles between 0 and 180
> degrees.
>
> library(ggplot2)
> library(REdaS)
> copdat$degrees <- c(0,45,90,135,180)
> copdat$radians <- deg2rad(copdat$degrees)
> copdat$sin_x <- sin(copdat$radians)
>
> ggplot(copdat,aes(x=degrees,y=sin_x))+
>  geom_point(size = 2)+ geom_line()+
>  theme_cowplot()+xlab("x")+
>  ylab("sin(x)")+
>  scale_x_continuous(breaks=seq(0,180,30))+
>  ggtitle("sin(x) vs x\nx is in degrees")
>
> My trig students would prefer a curved line plot similar to what can be
> plotted with Excel smooth line functionality.
> I wanted to provide a relatively simple R script using ggplot to do this
> without having to resort to fitting a sine curve to these points.
>
> Some guidance would be appreciated.
>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fstat.ethz.ch%2Fmailman%2Flistinfo%2Fr-help&data=04%7C01%7CJSorkin%40som.umaryland.edu%7C1ffa4922f2ba41588da908d94ed2a982%7C717009a620de461a88940312a395cac9%7C0%7C0%7C637627488997910453%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=90qApIoS6rwqkQuKPzy3x2AUPntuJ2W%2FtJgPGfiddEI%3D&reserved=0
> PLEASE do read the posting guide
> https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.r-project.org%2Fposting-guide.html&data=04%7C01%7CJSorkin%40som.umaryland.edu%7C1ffa4922f2ba41588da908d94ed2a982%7C717009a620de461a88940312a395cac9%7C0%7C0%7C637627488997910453%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=s9YIcjlEo4MvI6hcX%2FkV4gwJJKa172QrPEnHsqTiRa8%3D&reserved=0
> and provide commented, minimal, self-contained, reproducible code.
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

	[[alternative HTML version deleted]]