topic least square code in SAS/IML Software and Matrix Computations https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/least-square-code/m-p/109091#M820 <HTML><HEAD></HEAD><BODY><P>The code attached suppose to estimate alpha and beta using least square estimate . I didn't see what is wrong with the code , it does give me good value for alpha but this is not the case for beta , its always fixed at the lower bound of it's constrains . </P><P>Ill appreciate any help . Thank you in advance</P></BODY></HTML> Mon, 15 Apr 2013 21:17:33 GMT RolaMufied 2013-04-15T21:17:33Z least square code https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/least-square-code/m-p/109091#M820 <HTML><HEAD></HEAD><BODY><P>The code attached suppose to estimate alpha and beta using least square estimate . I didn't see what is wrong with the code , it does give me good value for alpha but this is not the case for beta , its always fixed at the lower bound of it's constrains . </P><P>Ill appreciate any help . Thank you in advance</P></BODY></HTML> Mon, 15 Apr 2013 21:17:33 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/least-square-code/m-p/109091#M820 RolaMufied 2013-04-15T21:17:33Z Re: least square code https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/least-square-code/m-p/109092#M821 <HTML><HEAD></HEAD><BODY><P>I might have done something wrong, but when I graph the LSQ function over a range of parameter values, it doesn't look like it has a maximum. If that is the case, it could be caused by a coding error in one of your functions.&nbsp;&nbsp; Try running the program on a problem for which you know the correct answer. That will help you locate the source of the problem.</P><P></P><P><IMG alt="lsq.png" class="jive-image" src="https://communities.sas.com/legacyfs/online/3408_lsq.png" /></P></BODY></HTML> Tue, 16 Apr 2013 17:49:29 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/least-square-code/m-p/109092#M821 Rick_SAS 2013-04-16T17:49:29Z