topic some introductory questions about matrix algebra in SAS in SAS/IML Software and Matrix Computations https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/some-introductory-questions-about-matrix-algebra-in-SAS/m-p/119239#M920 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am wondering what these comments mean in SAS if Z ,Y, and V are defined as a n by n and n x m and n by k matrices:</P><P></P><P>Z[+,] or Z[,+]</P><P>or</P><P>round(round(t(Z[+,]+V[+,]) - (Z[,+]+Y[,+]),.01)</P><P></P><P>what is "t" in this command.</P><P></P><P>Thank you</P></BODY></HTML> Thu, 17 May 2012 15:57:25 GMT goliPSU 2012-05-17T15:57:25Z some introductory questions about matrix algebra in SAS https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/some-introductory-questions-about-matrix-algebra-in-SAS/m-p/119239#M920 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am wondering what these comments mean in SAS if Z ,Y, and V are defined as a n by n and n x m and n by k matrices:</P><P></P><P>Z[+,] or Z[,+]</P><P>or</P><P>round(round(t(Z[+,]+V[+,]) - (Z[,+]+Y[,+]),.01)</P><P></P><P>what is "t" in this command.</P><P></P><P>Thank you</P></BODY></HTML> Thu, 17 May 2012 15:57:25 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/some-introductory-questions-about-matrix-algebra-in-SAS/m-p/119239#M920 goliPSU 2012-05-17T15:57:25Z Re: some introductory questions about matrix algebra in SAS https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/some-introductory-questions-about-matrix-algebra-in-SAS/m-p/119240#M921 <HTML><HEAD></HEAD><BODY><P>T() is the transpose function.</P><P>The plusses inside square brackets are called "<A href="http://blogs.sas.com/content/iml/2011/06/06/use-subscript-reduction-operators/">subscript reduction operators</A>."</P></BODY></HTML> Thu, 17 May 2012 16:38:54 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/some-introductory-questions-about-matrix-algebra-in-SAS/m-p/119240#M921 Rick_SAS 2012-05-17T16:38:54Z Re: some introductory questions about matrix algebra in SAS https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/some-introductory-questions-about-matrix-algebra-in-SAS/m-p/119241#M922 <HTML><HEAD></HEAD><BODY><P>Thank you so much!</P></BODY></HTML> Thu, 17 May 2012 18:35:13 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/some-introductory-questions-about-matrix-algebra-in-SAS/m-p/119241#M922 goliPSU 2012-05-17T18:35:13Z