Hi all, I have a series of questions asked of males and females separately. These are relative to physical development, and are measured on differing scales, thus I want to standardize each variable by age and gender before combining them to create one larger index.
Given the data structure provided, I have attempted a very inelegant solution that requires a lot of lines of code--below I've laid out what would be needed for just 2 variables, with only 4 ages, and for one gender. I have 5 total variables for each gender in my full data, plus a much larger age range (roughly 7 - 16) and therefore I'm hoping someone will have a solution for a loop or other more efficient way of doing this, otherwise this will quickly become hundreds of lines of code.
My attempted code:
Data:
Given the data structure provided, I have attempted a very inelegant solution that requires a lot of lines of code--below I've laid out what would be needed for just 2 variables, with only 4 ages, and for one gender. I have 5 total variables for each gender in my full data, plus a much larger age range (roughly 7 - 16) and therefore I'm hoping someone will have a solution for a loop or other more efficient way of doing this, otherwise this will quickly become hundreds of lines of code.
My attempted code:
Code:
// First standardize score 1 and then combine egen score_1_std_12 = std(score_1) if age == 12 & gender == 1 egen score_1_std_13 = std(score_1) if age == 13 & gender == 1 egen score_1_std_14 = std(score_1) if age == 14 & gender == 1 egen score_1_std_15 = std(score_1) if age == 15 & gender == 1 gen score_1_std = . replace score_1_std = score_1_std_12 if score_1_std_12 != . replace score_1_std = score_1_std_13 if score_1_std_13 != . replace score_1_std = score_1_std_14 if score_1_std_14 != . replace score_1_std = score_1_std_15 if score_1_std_15 != . // Standardize score 2 and combine egen score_2_std_12 = std(score_2) if age == 12 & gender == 1 egen score_2_std_13 = std(score_2) if age == 13 & gender == 1 egen score_2_std_14 = std(score_2) if age == 14 & gender == 1 egen score_2_std_15 = std(score_2) if age == 15 & gender == 1 gen score_2_std = . replace score_2_std = score_2_std_12 if score_2_std_12 != . replace score_2_std = score_2_std_13 if score_2_std_13 != . replace score_2_std = score_2_std_14 if score_2_std_14 != . replace score_2_std = score_2_std_15 if score_2_std_15 != . // Combine the vars into one larger index gen total_score_female = score_1_std + score_2_std
Data:
Code:
* Example generated by -dataex-. For more info, type help dataex clear input byte(age gender score_1 score_2 score_3 score_4) 12 0 . . 3 6 12 0 . . 4 7 12 0 . . 3 3 12 0 . . 2 4 12 0 . . 3 5 13 0 . . 2 7 13 0 . . 3 5 13 0 . . 4 6 13 0 . . 5 5 13 0 . . 3 4 14 0 . . 2 6 14 0 . . 3 7 14 0 . . 1 5 14 0 . . 1 4 14 0 . . 3 6 14 0 . . 2 7 15 0 . . 3 7 15 0 . . 4 5 15 0 . . 5 5 15 0 . . 3 6 15 0 . . 2 4 15 0 . . 2 7 12 1 1 8 . . 12 1 1 8 . . 12 1 2 8 . . 12 1 2 5 . . 12 1 3 6 . . 13 1 2 4 . . 13 1 1 4 . . 13 1 2 3 . . 13 1 3 4 . . 13 1 4 5 . . 14 1 3 6 . . 14 1 3 7 . . 14 1 1 4 . . 14 1 4 6 . . 14 1 3 4 . . 14 1 4 7 . . 15 1 5 8 . . 15 1 5 8 . . 15 1 4 8 . . 15 1 1 8 . . 15 1 3 5 . . 15 1 4 8 . . end