topic Can I use proc IML to solve my problem? Please help... in SAS/IML Software and Matrix Computations https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/Can-I-use-proc-IML-to-solve-my-problem-Please-help/m-p/212256#M2203 <HTML><HEAD></HEAD><BODY><P>I am trying to solve the following...</P><P></P><P>W = pX</P><P></P><P>X is an i x 1 vector of known values (i is the number of observations in my sample)</P><P>p is a constant and is negative (it is unknown).</P><P>W is an i x1 vector of unknown values. </P><P></P><P>The sum of the values in W needs to equal zero. (w1 + w2 + w3 + ...+ wi = 0)</P><P></P><P>I am trying to solve for W.</P><P>I am not sure how to set up this problem so that I can solve for W. </P><P></P><P>Is this something that I can do using proc IML?</P><P>If so, can you please help show me how I can set it up.... I have been struggling with this all day and any help or advice is appreciated!</P></BODY></HTML> Sun, 29 Mar 2015 22:35:52 GMT jennie 2015-03-29T22:35:52Z Can I use proc IML to solve my problem? Please help... https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/Can-I-use-proc-IML-to-solve-my-problem-Please-help/m-p/212256#M2203 <HTML><HEAD></HEAD><BODY><P>I am trying to solve the following...</P><P></P><P>W = pX</P><P></P><P>X is an i x 1 vector of known values (i is the number of observations in my sample)</P><P>p is a constant and is negative (it is unknown).</P><P>W is an i x1 vector of unknown values. </P><P></P><P>The sum of the values in W needs to equal zero. (w1 + w2 + w3 + ...+ wi = 0)</P><P></P><P>I am trying to solve for W.</P><P>I am not sure how to set up this problem so that I can solve for W. </P><P></P><P>Is this something that I can do using proc IML?</P><P>If so, can you please help show me how I can set it up.... I have been struggling with this all day and any help or advice is appreciated!</P></BODY></HTML> Sun, 29 Mar 2015 22:35:52 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/Can-I-use-proc-IML-to-solve-my-problem-Please-help/m-p/212256#M2203 jennie 2015-03-29T22:35:52Z Re: Can I use proc IML to solve my problem? Please help... https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/Can-I-use-proc-IML-to-solve-my-problem-Please-help/m-p/212257#M2204 <HTML><HEAD></HEAD><BODY><P>If sum(X)=0, then you can choose any value for p.&nbsp; If not, then there is no solution when p is nonzero.</P></BODY></HTML> Mon, 30 Mar 2015 09:59:30 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/Can-I-use-proc-IML-to-solve-my-problem-Please-help/m-p/212257#M2204 Rick_SAS 2015-03-30T09:59:30Z Re: Can I use proc IML to solve my problem? Please help... https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/Can-I-use-proc-IML-to-solve-my-problem-Please-help/m-p/212258#M2205 <HTML><HEAD></HEAD><BODY><P>Thanks Rick, </P><P></P><P>You are correct. </P><P>I am a bit embarrassed! </P><P></P><P>I got so stuck on looking at how to code the conditions that I made it more complicated than it truly was. </P><P>The sum of X is such that it equals zero...</P><P></P><P>Thank you for help, </P><P>Jennifer</P></BODY></HTML> Mon, 30 Mar 2015 12:22:46 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/Can-I-use-proc-IML-to-solve-my-problem-Please-help/m-p/212258#M2205 jennie 2015-03-30T12:22:46Z