Teaching Data to do Tricks

1. Teaching Data to do Tricks • Recoding continuous data into bins • Operations on alphanumeric variables (string variables) • Generating test data • Taking random subsamples from a finite population

2. Recoding continuous data into bins

3. Recoding continuous data into bins Symmetrical bins If X >=0 and X<5 then bin=2; if X >=5 and X<10 then bin=7; if X >=10 and X<15 then bin=12; if X >=15 and X<20 then bin=17; if X >=20 and X<25 then bin=22; if X >=25 and X<30 then bin=27; Asymmetrical bins If X >=0 and X<10 then bin=1; if X >=10 and X<100 then bin=2; if X >=100 and X<1000 then bin=3; if X >=1000 then bin=4;

4. Recoding continuous data into bins

5. Recoding continuous data into bins

6. Recoding continuous data into bins

7. Recoding continuous data into bins

8. Recoding continuous data into bins

9. Operations on alphanumeric variables • Concatenation • Substr • Scan

10. Random samples • _n_ variable