I always spot a handful of strange white horizontal dotted lines that seem to appear on the borders between vertically adjacent hexagons on every hexbin density plot that I create using ggplot2 in the R environment. They certainly do not belong there... This behavior (bug) is reproducible on several R installations on different computers with different MS Windows versions and different graphics drivers. I don't have a clue on how to get rid of these dotted lines. Below is a plot showing the problem, and the code that produced the plot. Is this a known problem? Any hint to overcome this? Thanks a bunch for any help!
## Load libraries
library(ggplot2)
library(hexbin)
## Create some data
set.seed(222)
myx <- data.frame(x = 0.4 + rnorm(10000, mean = 0, sd = 0.1))
myy <- data.frame(y = 0.5 + rnorm(10000, mean = 0, sd = 0.1))
MyData <- data.frame(xvariable=myx$x*100, yvariable=myy$y*100)
## Prepare the plot window
dev.off(2)
windows.options(width=6, height=6)
op <- par(mfrow = c(1,1))
op <- par(oma = c(0,0,0,0) + 0.1,
mar = c(5.1, 5.1, 4.1, 2.1))
## Creaate the plot
ggplot(MyData, aes(x=xvariable, y=yvariable) ) +
geom_hex(bins=66) +
xlim(0, 100) +
ylim(0, 100) +
ggtitle("My plot") +
scale_fill_continuous(type = "viridis") +
theme_bw() +
theme(plot.title = element_text(color="black", size=17, face="bold"),
axis.title.x = element_text(color="black", size=17, face="bold"),
axis.title.y = element_text(color="black", size=17, face="bold"),
axis.text=element_text(color="black", size=15, face="bold"),
legend.title = element_text(color = "black", size = 15),
legend.text = element_text(color = "black", size=12),
legend.position = c(0.9,0.2), legend.direction = "vertical")
