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Coa_SAs
Fluorite | Level 6

Hi All,

 

I have attached SAS Data Set, New_Gold needs to calculate as 

If _n_ then .

if _n_=2 then (Obs2-Obs1)^2

if _n_=3 then (obs3-obs2)^2

 

if _n_=4 then (Obs4-Obs3)^2 etc

 

As a first step I am using Lag function.

New_Gold=Lag(1_GoldS)

 

I am getting the follwing error, Please advise.

 


ERROR 22-322: Syntax error, expecting one of the following: !, !!, &, *, **, +, ',', -, /, <, <=, <>, =, >, ><, >=, AND, EQ, GE,
GT, IN, LE, LT, MAX, MIN, NE, NG, NL, NOTIN, OR, ^=, |, ||, ~=.

ERROR 72-185: The LAG function call has too many arguments.

 

1 ACCEPTED SOLUTION

Accepted Solutions
Astounding
Opal | Level 21

Seems like you could get what you want with:

 

new_gold = dif(GoldS)**2;

 

It will generate a missing value on the first observation, but that is expected.

 

If you are stuck on using LAG instead of DIF:

 

new_gold = lag(GoldS);

if _n_=1 then new_gold=.;

else new_gold = (GoldS - new_gold)**2;

 

Note that SAS uses ** (not ^) to indicate raising to a power.

 

Good luck.

View solution in original post

6 REPLIES 6
Reeza
Super User
The function is called is LAG<n> where <n> represents the amount of lag.

Your code should be:
lag1(variable_name).

Variables don't typically start with numbers, so perhaps its just a typo?
Coa_SAs
Fluorite | Level 6

Hi All,

 

I have data as attached. New_Gold needs to calculate as 

If _n_ then .

if _n_=2 then (Obs2-Obs1)^2

if _n_=3 then (obs3-obs2)^2

 if _n_=4 then (Obs4-Obs3)^2 etc

 

As a first step I am using Lag function.

New_Gold=Lag(1_GoldS)

 

I am getting the follwing error, Please advise.

 


ERROR 22-322: Syntax error, expecting one of the following: !, !!, &, *, **, +, ',', -, /, <, <=, <>, =, >, ><, >=, AND, EQ, GE,
GT, IN, LE, LT, MAX, MIN, NE, NG, NL, NOTIN, OR, ^=, |, ||, ~=.

ERROR 72-185: The LAG function call has too many arguments.

 

Reeza
Super User
Do you understand my comment? If not, please post your whole code and log. The code posted above isn't valid SAS syntax. As mentioned variables rarely start with numbers (1_GoldS)
Coa_SAs
Fluorite | Level 6

Thanks Reeza for your quick reply, I got it.

Reeza
Super User
Please mark the question as answered.
Astounding
Opal | Level 21

Seems like you could get what you want with:

 

new_gold = dif(GoldS)**2;

 

It will generate a missing value on the first observation, but that is expected.

 

If you are stuck on using LAG instead of DIF:

 

new_gold = lag(GoldS);

if _n_=1 then new_gold=.;

else new_gold = (GoldS - new_gold)**2;

 

Note that SAS uses ** (not ^) to indicate raising to a power.

 

Good luck.

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