Inverted Normal Graph

[Jeff Tree]

Hello all,

Admittedly a mundane question here... I'm simply trying to plot an inverted normal distribution for an upcoming presentation. I've successfully plotted a normal distribution, but now I simply need to flip it upside down.

clear
set obs 100
gen x=rnormal(0,1)
twoway function y=normalden(x), range(-4 4) xtitle("{it: x}") ///
ytitle("Density") title("Standard Normal")

Any suggestions would be greatly appreciated! I recently converted to Stata from SPSS and apologies for presumably a rather elementary question!

J.

[Mike Lacy]

What about just plotting y = 0.5 - normalden(x)? That looks OK to me, but maybe you want something different.

[Nick Cox]

Why 0.5?

[Scott Merryman]

twoway function y=normalden(x), range(-4 4)  yscale(reverse)

Also, there is no need to generate an x variable before hand.

[Jeff Tree]

Thanks Mike, worked perfectly!

[Mike Lacy]

The choice of 0.5 came from observing that the maximum ordinate for the normalden() function was a little less than 0.5, so subtracting 0.5 would make all the values > 0.