ESTIMATE STATMENT NOT WORKING ON SAS 9.4 NLIN PROCEDURE

[samkelomotsa]

USING THE CODE ALREADY POSTED IN SUNFLOWER EXAMPLE. 

I HAVE A PROBLEM THE ESTIMATE STATEMENT OR LINE IS NOT WORKING AS IT GIVES AN ERROR "ERROR 180-322: Statement is not valid or it is used out of proper order."

WHAT COULD BE THE PROBLEM? I HAVE TRIED SHIFTING THE ESTIMATE LINE TO BE BEFORE THE OUTPUT STATEMENT, STILL IT FAILS.

/* Mean heights of 58 sunflowers:
Reed, H. S. and Holland, R. H. (1919), "Growth of sunflower seeds"
Proceedings of the National Academy of Sciences, volume 5, p. 140.
http://www.pnas.org/content/pnas/5/4/135.full.pdf
*/
data Sunflower;
input Time Height;
label Time = "Time (days)"
Height="Sunflower Height (cm)";
datalines;
7 17.93
14 36.36
21 67.76
28 98.1
35 131
42 169.5
49 205.5
56 228.3
63 247.1
70 250.5
77 253.8
84 254.5
;
proc nlin data=Sunflower list noitprint;
parms K 250 r 1 b 40; /* initial guess */
model Height = K / (1 + exp(-r*(Time - b))); /* model to fit; Height and Time are variables in data */
output out=ModelOut predicted=Pred lclm=Lower95 uclm=Upper95;
estimate 'Dt' log(81) / r; /* optional: estimate function of parameters */
run;

[FreelanceReinh · Accepted solution]

Hello @samkelomotsa,

With my SAS 9.4 (TS1M5) using SAS/STAT 14.3 your code example works. Your error message suggests that you are using an older SAS/STAT version, perhaps 13.2 or 14.1, because the ESTIMATE statement of PROC NLIN was introduced in SAS/STAT 14.2 (which has been available since November 2016).

You can see the version number at the top of your SAS log. Also, PROC PRODUCT_STATUS writes the information to the log:

proc product_status;
run;

If it shows a version number <=14.1 for SAS/STAT, you will need a software update to make the ESTIMATE statement available.

[samkelomotsa]

Thank you. Let me update my software. I hope it won't affect my licence.

This is my version

For SAS/STAT ...
Custom version information: 14.1