r - geom_xspline producing zig-zag graphs?

Question

Was trying so hard to smooth lines (tried geom_smooth() and spline() but both didn't work). Finally managed to install ggalt after much hassle, and integrated geom_xspline() into my code as recommended by various sources:

p <- ggplot(data=pheno.types.list[[3]], aes(x=cutoff.val, y=pval))
p + geom_point(size = 0.5) + geom_xspline(size=0.5) + xlab("Cut Off") + ylab("p-value") + scale_y_log10()

But lo & behold, it messes my graph up:

geom_xspline messes graph up

I just want to smooth the geom_line() of my chart that has to pass through all the data points:

chart with geom_line

but I don't understand why this is such a challenging issue. Have googled for 10 hours (also because I'm quite inexperienced in R) but can't seem to find a solution.

Help! :')

question from:https://stackoverflow.com/questions/65833129/geom-xspline-producing-zig-zag-graphs

Answer 1

Waitting for answers