Hello! I have a data set that looks like this:
ID H1 H2 H3 H4 H5 H6 H7 H8 H9
01 10 10 10 10 10 10 10 10 10
02 10 8 5 10 10 0 9 10 3
03 9 10 8 10 9 10 10 10 6
04 7 10 7 8 10 0 10 0 10
05 5 10 6 10 4 10 10 9 10
I need to drop the lowest 2 homework scores and create a variable for the overall homework score for a student. So say for student ID 04, the two zero grades would be dropped and a percentage for homework would be (7+10+7+8+10+10+10)/70 = 88.6 % (homework scores are out of 10.
Ive tried commands like this in the data step:
oops1= min(of Q1--Q9);
if H1=min(of Q1--Q9) then drop H1;
But I'm not sure where to go from here. Based on my research I think I might need to build an array? Hopefully not cause I have very little experience with that. Any advice would be greatly appreciated!
/* UNTESTED CODE */
data want;
set have;
call sortn(of h1-h9);
average = mean(of h3-h9);
run;
CALL SORTN sorts H1-H9 in ascending order, thus H3-H9 are now the 7 largest (doesn't contain the two lowest) and you can average those.
I'm not sure what this will do if there are missing values in H1 through H9.
/* UNTESTED CODE */
data want;
set have;
call sortn(of h1-h9);
average = mean(of h3-h9);
run;
CALL SORTN sorts H1-H9 in ascending order, thus H3-H9 are now the 7 largest (doesn't contain the two lowest) and you can average those.
I'm not sure what this will do if there are missing values in H1 through H9.
On of my lines is:
5 9 0 0 0 0 0 0 0for HW 1-9. If the code worked as it should, I should get 2 as the output for average right? (5+9+0+0+0+0+0)/7=2. Instead I got 1.3571. Is my math wrong or is the code wrong?
NEVERMIND! I just had to change some variable names. ALL GOOD THANK YOU!
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