Abstract: There
is an important distinction between the Convert
String to Numeric procedure and the decode()
function. This article illustrates that distinction.
Products:
Statit
e-QC, Statit
e-Server, Statit
Custom QC
The Statit Custom QC menu gives you easy access
to the makelbl commands through the Edit ->
Variable dialogue, which makes a variable numeric
assigning it value labels representing its numeric
string. However, it does not show you the decode()
function, which will convert the actual values
within the string into a number. Try the following
commands:
assign
NumericVar 3 5 7 9 2
sassign StringVar "2" "4"
"6" "8" "1"
describe all
NumericVar
-- Cases = 5
StringVar -- Cases = 5 (length = 1)
Here, we can see that StringVar is a string
because its length is published. Let's use both
the makelbl
and decode()
function to see the difference in the two operations:
makelbl
StringVar into makelblVar
decodeVar=decode(StringVar)
print makelblVar decodeVar /raw
Obs makelblVar decodeVar
1 2 2
2 3 4
3 4 6
4 5 8
5 1 1
Looking at the raw values, we can see that
the makelblVar
has been numbered sequentially and given value
labels to represent the string in StringVar.
The decodeVar has been given the values of the
numeric string of StringVar. Now we can safely
do mathematically operation using decodeVar.
difference
= NumericVar - decodeVar
Obs
difference
1 1
2 1
3 1
4 1
5 1
If you would like additional information, please
call our Support staff at (541) 752-4100 or
send email to
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