plotting a fitted line on log scale graph

[John Kim]

Dear all,

Hello, I ran log(y) on log(x), and I'm graphing a scatter plot of y against x ON LOG SCALE, and I'd like to graph the fitted line (i.e., exp(a + b*log(x))) against x, all on one graph.

I'm not sure how to graph the fitted line on log scale graph.

I'd appreciate any and all help. Thank you very much!

Best,


John

[Nick Cox]

Here is a silly example for what I think you're doing. Note the importance of showing a data example and code that you've used to get a good response.

In my experience, Stata's not very good at nice default labels for logarithmic scales. That's something I've been working on intermittently, but I don't have a helper program to make public yet.

webuse grunfeld, clear 

scatter mvalue kstock , ysc(log) xsc(log)
gen logm = log(mvalue)
gen logk = log(kstock)
regress logm logk
predict raw
gen exp = exp(raw)

scatter mvalue exp kstock , ysc(log) xsc(log) c(. l) ms(Oh none) sort /// 
yti(mvalue) xti(kstock) ///
yla(5000 2000 1000 500 200 100 50, ang(h)) xla(1 10 100 1000) /// 
legend(order(2 "power function fit") pos(11) ring(0) nobox)