topic Re: SAS IML NLPNRA rountine in SAS/IML Software and Matrix Computations https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/SAS-IML-NLPNRA-rountine/m-p/154524#M1412 <HTML><HEAD></HEAD><BODY><P>Provide the analytical formulas that you have, and call the NLPFDD function to get the others.</P><P>See <A href="http://blogs.sas.com/content/iml/2011/10/14/hints-for-derivatives/" title="http://blogs.sas.com/content/iml/2011/10/14/hints-for-derivatives/">http://blogs.sas.com/content/iml/2011/10/14/hints-for-derivatives/</A> </P></BODY></HTML> Thu, 05 Feb 2015 11:31:17 GMT Rick_SAS 2015-02-05T11:31:17Z SAS IML NLPNRA rountine https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/SAS-IML-NLPNRA-rountine/m-p/154523#M1411 <HTML><HEAD></HEAD><BODY><P>When using Newton Raphson algo, we better provide first derivative to the routine. However, I can only provide some of the analytical formula for the derivatives and I want to approximate other derivatives by finite difference. Is this possible for NLPNRA routine?</P></BODY></HTML> Thu, 05 Feb 2015 11:16:55 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/SAS-IML-NLPNRA-rountine/m-p/154523#M1411 Hanyu 2015-02-05T11:16:55Z Re: SAS IML NLPNRA rountine https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/SAS-IML-NLPNRA-rountine/m-p/154524#M1412 <HTML><HEAD></HEAD><BODY><P>Provide the analytical formulas that you have, and call the NLPFDD function to get the others.</P><P>See <A href="http://blogs.sas.com/content/iml/2011/10/14/hints-for-derivatives/" title="http://blogs.sas.com/content/iml/2011/10/14/hints-for-derivatives/">http://blogs.sas.com/content/iml/2011/10/14/hints-for-derivatives/</A> </P></BODY></HTML> Thu, 05 Feb 2015 11:31:17 GMT https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/SAS-IML-NLPNRA-rountine/m-p/154524#M1412 Rick_SAS 2015-02-05T11:31:17Z