salve, inoltro qui la soluzione al problema ricevuta nella mailing list di R, e che ho posto qualche email fa qui nella mailing list GFOSS sulla incredibile lentezza nel fare i grafici in R nel mio Kubuntu 8. + KDE4.1, rilevata anche in un altro computer con Kubuntu 8.04 + KDE3.5. La inoltro perché qualcuno ha avuto il mio stesso problema, anche se in misura minore, ma magari può servire anche ad altri Saluti, Enrico Guastaldi
---------- Forwarded message ---------- From: Enrico Guastaldi <[email protected]> Date: 2009/1/24 Subject: Re: [R-sig-Geo] strange performances of R graphic window under Linux and MS WIndows To: [email protected] Thanks a lot for the answers, take a look of my scores: > system.time(pairs(USJudgeRatings)) user system elapsed 1.240 0.532 17.295 > X11(type="Xlib") > system.time(pairs(USJudgeRatings)) user system elapsed 0.224 0.020 0.437 For the graphics I'll propose the question to R-help mailing list. Thanks a lot! Enrico Guastaldi 2009/1/22 Barry Rowlingson <[email protected]> 2009/1/22 Enrico Guastaldi <[email protected]>: > > > Moreover, the graphic result is very poor, if I compare the resolution of > > two graphic windows (see attached file, Linux ont he left, and Windows on > > the right: the latter is really much better!!!) > > > > What I'm doing wrong? Or, what is wrong in X configuration of our Linux > > computers? > > Remeber that R in MS Windows under virtual machine is 10 times faster! > > Cairo?! > > Your attachments have been stripped (or you forgot to attach them), > but latest R versions use the Cairo graphics 'engine', which produces > higher quality output at a speed cost. You can fire up a non-Cairo > device with X11(type="Xlib"). > The difference in speed is a factor 5 on my machine: > > > X11(type="Xlib") > > system.time(pairs(USJudgeRatings)) > user system elapsed > 0.176 0.004 0.407 > > system.time(pairs(USJudgeRatings)) > user system elapsed > 0.836 0.252 2.398 > > Cairo graphics can look a bit 'blurred' because of the anti-aliasing. > > Barry >
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