[R] shaded area between a curve and a circle
L... L...
m@r@|@m@ck @end|ng |rom hotm@||@com
Sat Oct 22 21:05:45 CEST 2022
Dear, I have a picture in which I draw a circle over the standard normal curve. See below the lines used to draw the figure. The figure is ok, but my problem is: How to shade the areas A, B, C, D, E and F? I know I have to find the points of intersection but I don't know how to find them. Suggestions will be welcome.
library(plotrix)
x <- seq(-3.0, 3.0, 0.01)
fy <- dnorm(x)
fy <- fy / max(fy)
x11()
plot(x, fy, ylim = c(-1, 1), col = "white", lwd = 1.5, xlim = c(-3, 3), lty = 1)
draw.circle(0.0, 0.0, 2.00, border = 'blue', lty = 1, lwd = 0.8)
lines(x, fy, type = 'l', ylim = c(-1,1), col = 'red', )
lines(x,-fy, type = 'l', ylim = c(-1,1), col = 'red')
text( 0.0, 0.90, "A"); text( 0.0,-0.90, "B")
text(-1.8, 0.25, "C"); text( 1.8, 0.25, "D")
text(-1.8,-0.25, "E"); text( 1.8,-0.25, "F")
Best regards
ML
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