Hello, On my box I cannot reproduce this behavior with the following code: x0 = rand(100000) xopt = fmin_l_bfgs_b(rosen, x0, fprime=rosen_der,iprint=1) Cheers, Xavier ps : iprime = "any positive value" works also well on my box.

Hello,

I am using the fmin_l_bfgs_b function in scipy. This function has a parameter

for controling the iteration printing during the minimization. In fact the printing

is done by the fortran routine via a command like:

write (6,1002) iter,f,sbgnrm

which is a print on the screen.

For some reason I don't understand, when I use the routine in ipython, the print

is done only by bunch of lines every few minutes... just like if it was bufferized

before printing. Does someone knows the reason of this beheviour? is it a python,

ipython or scipy problem?

Cheers

Emmanuel

--

Emmanuel Pécontal

CRAL - Observatoire de Lyon

9, Av. Charles Andre

F-69561 Saint Genis Laval Cedex

tel (33) (0)4.78.86.83.76 - fax (33) (0)4.78.86.83.86

email : pecontal@obs.univ-lyon1.fr

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