y-axis (scale) problem

[River Huang]

Dear All, I found this question here (https://bbs.pinggu.org/thread-9190477-1-1.html). Basically, the question is how to obtain a graph like this?

In particular, the scale of y-axis is unusual. Any suggestions are appreciated (Sorry, no data is provided).

[Felix Bittmann]

I assume this is a log scaling, so this should work:

scatter YVAR XVAR, yscale(log) ylabel(0.001 0.01 0.1 1)

[Nick Cox]

That just looks like log scale on the vertical axis to me. You will need to spell out which axis labels and axis ticks you want. Without purporting to replicate that graph, I think this example shows the main syntax needed.

clear 
set obs 1
gen y = 0.1 
gen x = 6

scatter y x , ysc(r(0.01 1) log) yla(1 0.1 0.01, ang(h) tlength(*2)) ymtick(0.02(0.01)0.09 0.2(0.1)0.9, tlength(*2)) xla(0(2)12)

[River Huang]

Dear Felix, Thanks for the suggestion. However, I am not sure whether it is a "log" scaling. Thus, I make up the following data:

* Example generated by -dataex-. To install: ssc install dataex
clear
input float(y x)
   1  0
  .9  2
 .75  4
  .7  6
 .09  8
.008 10
end

Any further suggestions? Thanks.

[Nick Cox]

The values 1 0.1 0.01 0.001 look equally spaced to me. That is a logarithmic scale. I can't see any need for further suggestions unless you can explain what else you think it is.

[William Lisowski]

I agree with Nick Cox that the Y axis is logarithmic scaling.

Perhaps it would look like more familiar logarithmic axes if the units Y is measured in were scaled down by a factor of 1000 (say, from kilometers to meters), so the axis labels were 1, 10, 100, and 1000, but the result is the same. Equal distances between equal multiples defines a logarithmic scale.

[River Huang]

Dear Nick, Thanks a lot. This example helps.

[River Huang]

Dear William, Thanks for the explanation.