Large gap within yaxis in scatter plot

[Rafael Pacheco]

Hello all,

I'm working in this graph, but when I have few samples in y-axis a large gap appears between the samples in the graph. I tried everything from fixing sizes, margins and aspect ratio but I cannot find a coding solution for this.
Could you help me?

* Example generated by -dataex-. For more info, type help dataex
clear
input byte parameter str4(first second) byte(first_xaxis second_xaxis)
1 "red"  "blue" 0 1
2 "blue" "red"  0 1
end

set scheme s2color

gen yaxis = _n
replace yaxis = yaxis - 1
    
twoway (scatter yaxis first_xaxis if first == "blue", msymbol(O) mcolor(blue%30) msize(medlarge)) (scatter yaxis first_xaxis if first == "red", msymbol(O) mcolor(red%30) msize(medlarge)) (scatter yaxis second_xaxis if second == "blue", msymbol(O) mcolor(blue%30) msize(medlarge))  (scatter yaxis second_xaxis if second == "red", msymbol(O) mcolor(red%30) msize(medlarge)), /*

*/ yscale(range(0 1)) ytitle("", size(small))/*

*/ ylabel(0 "Sample 1" 1 "Sample 2", angle(0) labsize(vsmall) notick nogrid) /*

*/ xscale(range (0 1) titlegap(5)) xtitle("", size(small)) /*

*/ xlabel(0 "Parameter 1" 1 "Parameter 2", angle(vertical) labsize(vsmall) notick) /*

*/ leg(off)  graphregion(color(white))

When I have many samples, the graph aspect is fine as the Samples are evenly distribuited in the yaxis:

clear all
* Example generated by -dataex-. For more info, type help dataex
clear
input byte parameter str4(first second) byte(first_xaxis second_xaxis)
1 "red"  "blue" 0 1
2 "blue" "red"  0 1
3 "blue" "red"  0 1
4 "blue" "red"  0 1
5 "blue" "red"  0 1
6 "blue" "red"  0 1
7 "blue" "red"  0 1
8 "blue" "red"  0 1
9 "blue" "red"  0 1
10 "blue" "red"  0 1
11 "blue" "red"  0 1
end


set scheme s2color

gen yaxis = _n
replace yaxis = yaxis - 1
  
twoway (scatter yaxis first_xaxis if first == "blue", msymbol(O) mcolor(blue%30) msize(medlarge)) (scatter yaxis first_xaxis if first == "red", msymbol(O) mcolor(red%30) msize(medlarge)) (scatter yaxis second_xaxis if second == "blue", msymbol(O) mcolor(blue%30) msize(medlarge))  (scatter yaxis second_xaxis if second == "red", msymbol(O) mcolor(red%30) msize(medlarge)), /*

*/ yscale(range(0 10)) ytitle("", size(small))/*

*/ ylabel(0 "Sample 1" 1 "Sample 2", angle(0) labsize(vsmall) notick nogrid) /*

*/ xscale(range (0 1) titlegap(5)) xtitle("", size(small)) /*

*/ xlabel(0 "Parameter 1" 1 "Parameter 2", angle(vertical) labsize(vsmall) notick) /*

*/ leg(off)  graphregion(color(white))

I was able to artificially solve the problem by increasing the yscale without observations. This would solve the problem if I cut the graph using a image processing software, but I want to find a coding solution for this as this code will be inserted in a program:

clear all
* Example generated by -dataex-. For more info, type help dataex
clear
input byte parameter str4(first second) byte(first_xaxis second_xaxis)
1 "red"  "blue" 0 1
2 "blue" "red"  0 1
end

set scheme s2color

gen yaxis = _n
replace yaxis = yaxis - 1
    
twoway (scatter yaxis first_xaxis if first == "blue", msymbol(O) mcolor(blue%30) msize(medlarge)) (scatter yaxis first_xaxis if first == "red", msymbol(O) mcolor(red%30) msize(medlarge)) (scatter yaxis second_xaxis if second == "blue", msymbol(O) mcolor(blue%30) msize(medlarge))  (scatter yaxis second_xaxis if second == "red", msymbol(O) mcolor(red%30) msize(medlarge)), /*

*/ yscale(range(0 10)) ytitle("", size(small))/*

*/ ylabel(0 "Sample 1" 1 "Sample 2", angle(0) labsize(vsmall) notick nogrid) /*

*/ xscale(range (0 1) titlegap(5)) xtitle("", size(small)) /*

*/ xlabel(0 "Parameter 1" 1 "Parameter 2", angle(vertical) labsize(vsmall) notick) /*

*/ leg(off)  graphregion(color(white))

Is there a way to remove this large gap between the observations when few itens are added in the y-scale? Or to cut the extra top space from my artifical solution?

Thank you in advance,
With the best wishes

Rafael

[Rafael Pacheco]

a

[Andrew Musau]

Not sure what you are looking for. Have you tried adding something like

aspect(0.1)

in the first graph? If so, how is the result different from what you want?

[Scott Merryman]

Does this work:

twoway scatter yaxis first_xaxis if first == "blue", msymbol(O) mcolor(blue%30)   msize(*5) /// 
    || scatter yaxis first_xaxis if first == "red", msymbol(O) mcolor(red%30)  msize(*5)  /// 
    || scatter yaxis second_xaxis if second == "blue", msymbol(O) mcolor(blue%30)  msize(*5)  /// 
    || scatter yaxis second_xaxis if second == "red", msymbol(O) mcolor(red%30)  msize(*5)   /// 
    || , ylabel(0 "Sample 1" 1 "Sample 2", angle(0) labsize(*2.5) notick nogrid)  /// 
         xlabel(0 "Parameter 1" 1 "Parameter 2", angle(vertical)  labsize(*2.5) notick)  /// 
         legend(off)  xsize(6) ysize(1.5)  ytitle("")

[Rafael Pacheco]

Not sure what you are looking for. Have you tried adding something like

aspect(0.1)

in the first graph? If so, how is the result different from what you want?

Dear Andrew,

Yeah, this works.
I was doing this with the inflated yscale, which obviously was not solving the problem.

Sorry for the silly question.

Best
Rafael