I have a short chunk of Sage code that I am running from the command line.
It produces errors with newer versions of Sage, but works as intended with
older versions (producing a graphics file). Of about 20 such chunks, 3
appear to be failing. Is this a known problem? Should I make a ticket?
Any ideas or suggestions?
(These are produced automatically, which is why some parts look bit odd,
but it also means they are consistent in many ways.) Facts follow - I can
provide more if needed.
Invocation:
/sage/sage-6.5.beta6/sage firstlook02-newton-cooling.sage svg
Error:
CRITICAL:root:unknown notebook: None
Error, notebook must be one of default, ipython, sagenb but got None
firstlook02-newton-cooling.sage:
import sys
suffix = sys.argv[1]
f(x) = 28.6 * exp(-0.0725 * x) + 70
p = plot(f, (x, 0, 50), ymin = 55, ymax = 110, thickness=2, aspect_ratio=0.4
, axes_labels=['$t$','$T(t)$'], fontsize=18)
plot_idp37915040 = p
try:
plot_idp37915040.save("firstlook02-newton-cooling.{}".format(suffix))
except ValueError:
plot_idp37915040.save("firstlook02-newton-cooling.png")
Fails: 6.4 (Linux), 6.5.beta6 (Linux), 6.4.1 (Mac)
Succeeds: 6.0, 6.2, 6.3 (all Linux)
Linux testing is on built-from-source (unsure about Mac binaries).
The following very similar file succeeds with a similar invocation:
firstlook01-exercise-slope-field-1.sage:
import sys
suffix = sys.argv[1]
t = var('t')
f(x) = 2*x*(1 - x)
v = plot_slope_field(f, (t,-2,2), (x,-2,2), headaxislength=3, headlength=3,
axes_labels=['$t$','$x$'], fontsize=18)
plot_idp38572272 = v
try:
plot_idp38572272.save("firstlook01-exercise-slope-field-1.{}".format(
suffix))
except ValueError:
plot_idp38572272.save("firstlook01-exercise-slope-field-1.png")
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