search for: genhypergeo

...elieve the dt() function in stats has small areas of inaccuracy. SmallRangeMostDetaileddf150.png shows this occurring in the 10-11th decimal place. MyD4 is computed using Myt_NC(), at the bottom of BugL.R - my function is very slow due to using mpfr, but i believe accurate to the accuracy of genhypergeo() which it uses - 14-15 dp. LargeRangeDiffdf150.png, which is difference between dt() and my function, shows spikes across -1.5 < x < 1.5. I assumed probably only a problem for large df, but SmallRangeCloseZerodf20.png, shows actually more of a problem with df = 20.? Accuracy seems to...

Dear All, I am looking for an implementation in R of the Appell Hypergeometric function. Any suggestions will be more than appreciated! GP -- dr. Giovanni Parrinello External Lecturer Medical Statistics Unit Department of Biomedical Sciences Viale Europa, 11 - 25123 Brescia Italy Tel: +390303717528 Fax: +390303717488 email: parrinel at med.unibs.it

...column in the table with Mathematica values, where you can see the great differences in the last values. I have a lot of examples of these differences, with non very strange parameters values. I've also tried to define the Tricomi function in relation to the usual confluent function given by genhypergeo(), but errors are even greater. Does anybody know another function or another way to define an accurate version of Tricomi function? -- Dr. Antonio José Sáez Castillo Dpto. de Estadística e Investigación Operativa Escuela Politécnica Superior de Linares Universidad de Jaén C/ Alfonso X El Sabio...