generating N dummies for each value in variable

[Matteo Bulgarelli]

Good morning,

I need to generate a categorical variable for each of these entries:

  number of |
   tutoring |
      first |
   semester |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,455       89.37       89.37
          1 |          8        0.21       89.58
          2 |          6        0.16       89.73
          3 |         10        0.26       89.99
          4 |         13        0.34       90.33
          5 |         12        0.31       90.64
          6 |         10        0.26       90.89
          7 |         16        0.41       91.31
          8 |         13        0.34       91.65
          9 |         19        0.49       92.14
         10 |         23        0.59       92.73
         11 |         21        0.54       93.27
         12 |         28        0.72       94.00
         13 |         27        0.70       94.70
         14 |         32        0.83       95.53
         15 |         24        0.62       96.15
         16 |         23        0.59       96.74
         17 |         28        0.72       97.47
         18 |         17        0.44       97.90
         19 |          6        0.16       98.06
         20 |          5        0.13       98.19
         21 |         10        0.26       98.45
         22 |          6        0.16       98.60
         23 |          6        0.16       98.76
         24 |          8        0.21       98.97
         25 |          4        0.10       99.07
         26 |          3        0.08       99.15
         27 |          3        0.08       99.22
         28 |          3        0.08       99.30
         29 |          4        0.10       99.41
         30 |          4        0.10       99.51
         31 |          2        0.05       99.56
         32 |          2        0.05       99.61
         33 |          1        0.03       99.64
         35 |          2        0.05       99.69
         37 |          3        0.08       99.77
         41 |          2        0.05       99.82
         42 |          1        0.03       99.84
         43 |          2        0.05       99.90
         44 |          1        0.03       99.92
         45 |          1        0.03       99.95
         46 |          1        0.03       99.97
         48 |          1        0.03      100.00
------------+-----------------------------------
      Total |      3,866      100.00

. gen i.Tut_20161

the variable is called "Tut_20161"

I think it should be forvalues , I simply can't do loops with forvalues.

[Nick Cox]

You don't usually need that many indicators (you say "dummies"). Just use factor variable notation in your model fit command. But if you do really need those variables, you don't need a loop of any kind. Use tabulate with a generate() option.

More discussion at https://journals.sagepub.com/doi/abs...36867X19830921 but the paragraph above is, I think, all you need to know.

[Matteo Bulgarelli]

You don't usually need that many indicators (you say "dummies"). Just use factor variable notation in your model fit command. But if you do really need those variables, you don't need a loop of any kind. Use tabulate with a generate() option.

More discussion at https://journals.sagepub.com/doi/abs...36867X19830921 but the paragraph above is, I think, all you need to know.

Thank you, infinitely, I didn't know you could generate as option of tab...

Matteo

[Nick Cox]

Good, but Just use factor variable notation in your model fit command remains the main advice.