如何创建一个在 R 中绘制径向线的函数？

Question

I have never plotted a radial in R before, so I have no idea what I am doing. Is there a different type of plot I should be using? Also I have a list of r's and theta's, however I am not sure how to create a loop in order to transform them all to Cartesian coordinates?

Data

"theta","r"
0,4
0.31,2.07
0.63,2.15
0.94,3.08
1.26,4.09
1.57,2.39
1.88,1.96
2.2,3.72
2.51,4.72
2.83,2.87
3.14,1.67
3.46,3.51
3.77,4.37
4.08,2.24
4.4,2.23
4.71,4.18
5.03,3.12
5.34,2.67
5.65,2.19
5.97,3.16

Answer 1

The ggplot2 package allows for plotting in polar coordinates quite conveniently:

library(ggplot2)
ggplot(DF, aes(theta, r)) +
  geom_line() +
  coord_polar()
  

coord_polar() does all the transformation.

Data

DF <- data.table::fread("theta,r
                  0,4
                  0.31,2.07
                  0.63,2.15
                  0.94,3.08
                  1.26,4.09
                  1.57,2.39
                  1.88,1.96
                  2.2,3.72
                  2.51,4.72
                  2.83,2.87
                  3.14,1.67
                  3.46,3.51
                  3.77,4.37
                  4.08,2.24
                  4.4,2.23
                  4.71,4.18
                  5.03,3.12
                  5.34,2.67
                  5.65,2.19
                  5.97,3.16")