Kernel Density Plots: Why I obtain an Error?

[Michael Duarte Goncalves]

Hi everyone,

I am trying to draw a kernel density plot. But I obtain an error:

.  twoway `kden',  scheme(white_tableau) ///
>      legend(subtitle("Tariff Types:", size(2)) label(1 "Clasico") label(2 "I
> ndexado") label(3 "Sin Sorpresas") label(4 "Tarifa Justa") rowgap(0.25) size
> (2)) ///
>      title("{bf}Density Plot", pos(11) size(2.75)) ///
>      ytitle("Density", size(2) orient(horizontal)) ///
>      ylabel(, nogrid labsize(2)) ///
>      xtitle("Spanish ZIP Codes (Two-Digits)", size(2)) ///
>      xlabel(, nogrid labsize(2)) ///
>      subtitle("Contract Types, by ZIP Code", pos(11) size(2)) 
insufficient observations
r(2001);

. groups tariff_ekon_id2

  +---------------------------------------+
  | tariff~2     Freq.   Percent      %<= |
  |---------------------------------------|
  |      20A     18384      1.44     1.44 |
  |    20DHA    165269     12.92    14.36 |
  |    20DHS      1183      0.09    14.45 |
  |     20TD   1039954     81.31    95.77 |
  |      20a         7      0.00    95.77 |
  |---------------------------------------|
  |    20dha         9      0.00    95.77 |
  |      21A      2345      0.18    95.95 |
  |    21DHA      5925      0.46    96.41 |
  |    21DHS        43      0.00    96.42 |
  |    21dha         1      0.00    96.42 |
  |---------------------------------------|
  |       30     11907      0.93    97.35 |
  |     30TD     31832      2.49    99.84 |
  |       31       424      0.03    99.87 |
  |      61A        16      0.00    99.87 |
  |     61TD      1536      0.12    99.99 |
  |---------------------------------------|
  |      62A         1      0.00    99.99 |
  |     62TD        29      0.00    99.99 |
  |     63TD        17      0.00   100.00 |
  |     64TD        51      0.00   100.00 |
  |       No         1      0.00   100.00

Could you please me in this process. Do I have to delete the extreme values? Or do I have to put them together?

Thank you so much.
Best,

Michael

[George Ford]

what's in `kden'?

[Michael Duarte Goncalves]

Hi George Ford:

I found a solution.

Thank you for your help.

Best,

Michael