On Sun, 21 Mar 2010 18:35:19 +0100 Renato <renn...@gmail.com> wrote: > On Thu, 18 Mar 2010 08:43:44 +0100 > Jose Guzman <n...@neurohost.org> wrote: > > > Hi Nareto, > > > > would you mind to write a simple and minimal example of your f(t) > > and plot options? This would be the best way to try to help you > > > > > > > > Nareto wrote: > > > Hello, I have to plot an exponential function with vertical > > > asymptote in point tc, but > > > > > > plot(f(t), (tc - e, tc + e)); > > > > > > gives me unreadable plots for any values of e - if e is to large > > > the curvature is not apreciable (i.e. the plot is confused with > > > the axes) but if it's too small I'm getting things like 40000 on > > > the y axis. > > > > > > So, how can I force the y axis range? I tried this but it doesn't > > > change anything: > > > > > > P = plot(f(t)); > > > P.set_range_axes(tc - 0.2, tc + 0.2, f(tc - 0.2), f(tc + 0.2)); > > > show(P); > > > > > > Question #2, how can I tell sage not to 'break' the axes? for > > > example, > > > > > > plot(1/(x + 3)); > > > > > > doesn't show me the last bit of the y axis, it ends approximately > > > at 0.25 > > > > > > > > > thanks for any help > > > Renato > > > > > > > > > > > > Ok, sorry for the delay. Here there is a simplified version of what > I'd like to do. I'm having difficulties in viewing a satisfactory > "zoom" level near the critical value of t (called tc in the code). > The line is there because I'd like to draw the vertical asymptote > > g(t) = exp(t)/(2*exp(t) - 1); > tc = N(ln(1/2)); > c = 0.3; > P = plot(g(t),(tc - c, tc + c), color='yellow'); > L = line([(tc,-c*10^4),(tc,c*10^4)], color='green', linestyle='--'); > P + L; > > > > any ideas? > thanks > Renato
Ok, this was as simple as using the 'ymin' and 'ymax' options of plot (I had done something else wrong previously when G B suggested this cause it didn't work) BTW I didn't find any mention of these plot options in the docs, worth adding? Renato -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org To unsubscribe from this group, send email to sage-support+unsubscribegooglegroups.com or reply to this email with the words "REMOVE ME" as the subject.
