Re: [Matplotlib-users] [matplotlib-users] How to plot digamma function (psi)

2012-07-10 Thread Fabien Lafont
Thanks! The problem came from the 1/2 ! For convenience I've found the function digamma on numpy *http://docs.scipy.org/doc/scipy/reference/generated/scipy.special.psi.html But it's quite hard to find it! Maybe we can ask to add digamma in the title between parenthesis? Fabien * 2012/7/10 Damon

Re: [Matplotlib-users] [matplotlib-users] How to plot digamma function (psi)

2012-07-10 Thread Damon McDougall
On Tue, Jul 10, 2012 at 08:57:24AM -0400, Benjamin Root wrote: > On Tue, Jul 10, 2012 at 7:05 AM, Damon McDougall > wrote: > > > On Tue, Jul 10, 2012 at 12:27:59PM +0200, Fabien Lafont wrote: > > > > > But It returns zero division error even when x is in ]0,1] > > > > I think it blows up at x = 0.

Re: [Matplotlib-users] [matplotlib-users] How to plot digamma function (psi)

2012-07-10 Thread Benjamin Root
On Tue, Jul 10, 2012 at 7:05 AM, Damon McDougall wrote: > On Tue, Jul 10, 2012 at 12:27:59PM +0200, Fabien Lafont wrote: > > Hello everyone, > > > > I try to plot the digamma function of (1/2 + 1/x) but I'm not sure that > I'm > > plotting the good one. > > > > I've tried: > > > > special.polygamm

Re: [Matplotlib-users] [matplotlib-users] How to plot digamma function (psi)

2012-07-10 Thread Damon McDougall
On Tue, Jul 10, 2012 at 12:27:59PM +0200, Fabien Lafont wrote: > Hello everyone, > > I try to plot the digamma function of (1/2 + 1/x) but I'm not sure that I'm > plotting the good one. > > I've tried: > > special.polygamma(0, (1/2 + 1/x)) > > and > > special.polygamma(1, (1/2 + 1/x)) You wan

[Matplotlib-users] [matplotlib-users] How to plot digamma function (psi)

2012-07-10 Thread Fabien Lafont
Hello everyone, I try to plot the digamma function of (1/2 + 1/x) but I'm not sure that I'm plotting the good one. I've tried: special.polygamma(0, (1/2 + 1/x)) and special.polygamma(1, (1/2 + 1/x)) but I don't have the same result as with mathcad. I've tried to code it like that: def F(x):