topic Re: iml in SAS/IML Software and Matrix Computations https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/iml/m-p/145806#M1242 <HTML><HEAD></HEAD><BODY><P>Since you have asked several elementary questions, here is a link to an article that might help: <A href="http://blogs.sas.com/content/iml/2011/05/09/how-to-learn-sasiml-five-resources-for-the-beginner/" title="http://blogs.sas.com/content/iml/2011/05/09/how-to-learn-sasiml-five-resources-for-the-beginner/"> How to learn SAS/IML: Five resources for the beginner - The DO Loop</A> </P><P></P><P>In particular, tip #4 is relevant. When you write your funtion, you will need to use the</P><P>RETURN statement</P><P>IF-THEN/ELSE statement</P><P>DET function, and</P><P>INV function</P><P></P><P>BTW, your logic is backwards: if the determinant is NOT zero, you can compute the inverse.</P></BODY></HTML> Tue, 06 May 2014 09:30:23 GMT Rick_SAS 2014-05-06T09:30:23Z iml https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/iml/m-p/145805#M1241 <HTML><HEAD></HEAD><BODY><P>how would you create a subroutine that accepts an nxn matrix, finds its inverse if the determinant is 0 or prints an error if the matrix's determinant isn't 0?</P></BODY></HTML> Mon, 05 May 2014 23:34:32 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/iml/m-p/145805#M1241 bri11 2014-05-05T23:34:32Z Re: iml https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/iml/m-p/145806#M1242 <HTML><HEAD></HEAD><BODY><P>Since you have asked several elementary questions, here is a link to an article that might help: <A href="http://blogs.sas.com/content/iml/2011/05/09/how-to-learn-sasiml-five-resources-for-the-beginner/" title="http://blogs.sas.com/content/iml/2011/05/09/how-to-learn-sasiml-five-resources-for-the-beginner/"> How to learn SAS/IML: Five resources for the beginner - The DO Loop</A> </P><P></P><P>In particular, tip #4 is relevant. When you write your funtion, you will need to use the</P><P>RETURN statement</P><P>IF-THEN/ELSE statement</P><P>DET function, and</P><P>INV function</P><P></P><P>BTW, your logic is backwards: if the determinant is NOT zero, you can compute the inverse.</P></BODY></HTML> Tue, 06 May 2014 09:30:23 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/iml/m-p/145806#M1242 Rick_SAS 2014-05-06T09:30:23Z