Change transparency of symbols in R function plotrix::polar.plot()

Question

Is there a simple way to control the transparency of the blue circles in the function below to control the overplotting.

library(plotrix)
polar.plot(1:5000, rnorm(5000,90,30), rp.type='s', point.col='blue')

I'm hoping for some transparency parameter, usually called alpha, between 0 and 1.

G5W · Accepted Answer · 2017-02-04T14:01:03.497

2

There are lots of ways to do this, but an easy one is using the rgb function. Here is an example with 50% transparency.

polar.plot(1:5000, rnorm(5000,90,30), rp.type='s', point.col=rgb(0,0,1, 0.5))

edited Feb 04 '17 at 14:01

answered Feb 04 '17 at 02:23

G5W

2

or `adjustcolor("blue",alpha=0.5)` – Ben Bolker Feb 04 '17 at 14:24
@Ben. Do you mean `point.col = adjustcolor("blue",alpha=0.5)` parameter or some other? – Oleg Melnikov Feb 05 '17 at 00:25

1 Answers1