Aptech Systems, Inc. Worldwide Headquarters
Aptech Systems, Inc.
2350 East Germann Road, Suite #21
Chandler, AZ 85286
Ready to Get Started?
For Pricing and Distribution
Training & Events
Step-by-step, informative lessons for those who want to dive into GAUSS and achieve their goals, fast.
Have a Specific Question?
Q&A: Register and Login
Premier Support and Platinum Premier Support are annually renewable membership programs that provide you with important benefits including technical support, product maintenance, and substantial cost-saving features for your GAUSS System or the GAUSS Engine.
Join our community to see why our users are considered some of the most active and helpful in the industry!
Where to Buy
Available across the globe, you can have access to GAUSS no matter where you are.
Recent Tagsapplications character vectors CMLMT Constrained Optimization covariance matrix datasets dates dlibrary dllcall error error codes errors Excel FANPACMT file i/o floating network GAUSS Engine graphics GUI hotkeys installation Java API license licensing linux loading data loops matrices matrix manipulation Maxlik MLMT operators OPMT optimization Optmum PQG graphics procs random numbers simgauss string functions strings structures threading Time Series writing data
Time Series 2.0 MT
Find out more now
Time Series MT 2.1
Error G0025: Undefined symbol
I am trying to write code to solve problem 5 chapter 16 of Greene’s Econometric Analysis 6th edition. I have a single sample has the weibull distribution. Gauss keeps telling me that my alpha and beta are unidentified.
However, I’m not sure what I am doing wrong. I have the solution to the problem but I want to run the code to see if I get the correct result. Here is my code:
load data[20,1] =C:\Users\Assma\Desktop\GAUSS\HW3Data.txt; x=data[.,1]; //initializing global variables beta>0; alpha>0; n=rows(data); proc f(x); local fcn; fcn=n*ln(alpha)+n*ln(beta)+(beta-1)*sumc(ln(x))-alpha*sumc(x^beta); retp( -sumc(fcn) ); endp;
Are you meaning to assign alpha and beta to be equal to zero? If so, you need to change these two lines:
//initializing global variables beta > 0; alpha > 0;
to use the equals sign like this:
//initializing global variables beta = 0; alpha = 0;
Making this change will remove the error you are reporting.
The code as you originally had i.e (beta > 0;) is evaluating whether beta is greater than zero. It will return a 1 if beta is greater than zero or a 0 if not. However, in this case since they were not assigned, it will just give the “Undefined symbol” error.