SAS transpose data into long form - sas

Question

I have the following dataset and hoping to transpose it into long form:
data have ;
input Height $ Front Middle Rear ;
cards;
Low 125 185 126
Low 143 170 136
Low 150 170 129
Low 138 195 136
Low 149 162 147
Medium 141 176 128
Medium 137 161 133
Medium 145 167 148
Medium 150 165 145
Medium 130 184 141
High 129 157 149
High 141 152 137
High 148 186 138
High 130 164 126
High 137 176 138
;
run;
Here Height is low, medium and high. Location is front, middle and rear. Numerical values are prices by location and height of a book on a bookshelf.
I'm hoping to transpose the dataset into long form with columns:
Height, Location and Price
The following code only allows me to transpose Location into long form. How should I transpose Height at the same time?
data bookp;
set bookp;
dex = _n_;
run;
proc sort data=bookp;
by dex;
run;
proc transpose data=bookp
out=bookpLong (rename=(col1=price _name_= location )drop= _label_ dex);
var front middle rear;
by dex;
run;

Answer 1

I think you just need to include HEIGHT in the BY statement.
First let's convert your example data into a SAS dataset.
data have ;
input Height $ Front Middle Rear ;
cards;
Low 125 185 126
Low 143 170 136
Medium 141 176 128
Medium 137 161 133
High 129 157 149
High 141 152 137
;
Now let's add an identifier to uniquely identify each row. Note that if you are really reading the data with a data step you could do this in the same step that reads the data.
data with_id ;
row_num+1;
set have;
run;
Now we can transpose.
proc transpose data=with_id out=want (rename=(_name_=Location col1=Price));
by row_num height ;
var front middle rear ;
run;
Results:
Obs row_num Height Location Price
1 1 Low Front 125
2 1 Low Middle 185
3 1 Low Rear 126
4 2 Low Front 143
5 2 Low Middle 170
6 2 Low Rear 136
7 3 Medium Front 141
8 3 Medium Middle 176
9 3 Medium Rear 128
10 4 Medium Front 137
11 4 Medium Middle 161
12 4 Medium Rear 133
13 5 High Front 129
14 5 High Middle 157
15 5 High Rear 149
16 6 High Front 141
17 6 High Middle 152
18 6 High Rear 137