Hi:
I'm trying to show my students a plot of
a rational function whose graph is basically 1,
so I plotted
f(x) = (x^2+0.0001)/(x^2+0.000101)
However, there is a problem: Note the difference between
plot((x^2+0.0001)/(x^2+0.000101), (x,-10,10))
(which dips down near x=0) and
plot((x^2+0.000
If i try to do
plot(cos(x),(x,-3,3))
in sage 3.4 (through the internet version)
it brakes with the message
TypeError: a float is required
The command worked in sage 3.3
Also, in the notebook
sphere()
produces nothing; but
(sphere()).show()
launches the jmol applet as desired.
I don't know if
Hi all,
A student of mine noticed the following and it looks like a bug to me
(at least with the documentation).
>From the notebook with 3.1.2 (sage prompts added for readability):
sage: plot?
File:
/home/jason/sage/local/lib/python2.5/site-packages/sage/plot/plot.py
Type:
Defi
It might help seeing your graphs here, too.
On Thu, Mar 14, 2024 at 10:04 AM David Joyner wrote:
> Hi:
>
> I'm trying to show my students a plot of
> a rational function whose graph is basically 1,
> so I plotted
> f(x) = (x^2+0.0001)/(x^2+0.000101)
> However, there is a problem: Note the di
On Thursday, March 14, 2024 at 10:35:50 AM UTC-4 dim...@gmail.com wrote:
It might help seeing your graphs here, too.
Try this:
https://sagecell.sagemath.org/?z=eJxL06jQVLBV0KiIM9I20DMwMDDU1EfiGBiAhXi5fICKojUq9IEiOgppEIampkJafpFChUJmnkJRYl56qoYuWBokFcvLlZNZXBJfkJNfouGjqYAVKCsklabb83IpIynVUajMz
On Thu, Mar 14, 2024 at 1:51 PM kcrisman wrote:
>
>
> On Thursday, March 14, 2024 at 10:35:50 AM UTC-4 dim...@gmail.com wrote:
>
> It might help seeing your graphs here, too.
>
>
> Try this:
>
>
> https://sagecell.sagemath.org/?z=eJxL06jQVLBV0KiIM9I20DMwMDDU1EfiGBiAhXi5fICKojUq9IEiOgppEIampkJafpF
On Thu, Mar 14, 2024 at 10:35 AM Dima Pasechnik wrote:
> It might help seeing your graphs here, too.
>
It is attached, Dima. Note that the correct graph should be
(for all practical purposes) simply the plot of the constant
function 1 for all x.
[image: bug-in-plot-of-rational-function.jpg]
I get the impression that without setting ymin,ymax you just end up with a
tiny range for the y-axis and its labelling is just very weird. I think the
labels displayed are shifted and scaled. So the error is just how the
labels are printed. That looks the same as
https://github.com/sagemath/sag
On 14 March 2024 21:09:22 GMT, Nils Bruin wrote:
>I get the impression that without setting ymin,ymax you just end up with a
>tiny range for the y-axis and its labelling is just very weird. I think the
>labels displayed are shifted and scaled. So the error is just how the
>labels are printed
On Thu, Mar 14, 2024 at 9:32 PM Dima Pasechnik wrote:
>
>
> On 14 March 2024 21:09:22 GMT, Nils Bruin wrote:
> >I get the impression that without setting ymin,ymax you just end up with
> a
> >tiny range for the y-axis and its labelling is just very weird. I think
> the
> >labels displayed are sh
On Fri, Mar 15, 2024 at 12:15 AM Dima Pasechnik wrote:
>
>
> On Thu, Mar 14, 2024 at 9:32 PM Dima Pasechnik wrote:
>
>>
>>
>> On 14 March 2024 21:09:22 GMT, Nils Bruin wrote:
>> >I get the impression that without setting ymin,ymax you just end up with
>> a
>> >tiny range for the y-axis and its
On Thu, Mar 14, 2024 at 8:17 PM Dima Pasechnik wrote:
>
>
> On Fri, Mar 15, 2024 at 12:15 AM Dima Pasechnik wrote:
>
>>
>>
>> On Thu, Mar 14, 2024 at 9:32 PM Dima Pasechnik wrote:
>>
>>>
>>>
>>> On 14 March 2024 21:09:22 GMT, Nils Bruin wrote:
>>> >I get the impression that without setting ymi
On Fri, Mar 15, 2024 at 9:13 AM David Joyner wrote:
>
>
> On Thu, Mar 14, 2024 at 8:17 PM Dima Pasechnik wrote:
>
>>
>>
>> On Fri, Mar 15, 2024 at 12:15 AM Dima Pasechnik
>> wrote:
>>
>>>
>>>
>>> On Thu, Mar 14, 2024 at 9:32 PM Dima Pasechnik
>>> wrote:
>>>
On 14 March 2024 21:0
it's not a bug, it's a feature. :-)
https://discourse.matplotlib.org/t/default-format-of-axis-offset-label/23162/2
Correct.
import matplotlib as mpl
mpl.rcParams['axes.formatter.useoffset'] = False
plot((x^2+0.0001)/(x^2+0.000101), (x,-0.1,0.1))
produces the normal labelling of y-axes, wi
On 15 March 2024 19:42:48 GMT, kcrisman wrote:
>
>
>it's not a bug, it's a feature. :-)
>https://discourse.matplotlib.org/t/default-format-of-axis-offset-label/23162/2
>
>
>Correct.
>
>import matplotlib as mpl
>mpl.rcParams['axes.formatter.useoffset'] = False
>plot((x^2+0.0001)/(x^2+0.00010
On Friday 15 March 2024 at 12:42:49 UTC-7 kcrisman wrote:
Or rather, should the default be useoffset False?
Yes, I think that would be reasonable to do. Clearly, offsets being used
without the user knowing they exist can easily lead to confusion and
misinterpreting the graph, as had been demon
On Fri, Mar 15, 2024 at 9:44 PM Nils Bruin wrote:
> On Friday 15 March 2024 at 12:42:49 UTC-7 kcrisman wrote:
>
> Or rather, should the default be useoffset False?
>
>
> Yes, I think that would be reasonable to do. Clearly, offsets being used
> without the user knowing they exist can easily lead
I'd think that matplotlib's defaults are defaults for a good reason.
Agreed, but not a good *mathematical* reason. It is a good *data analysis*
reason (appropriate for mpl), which is not the same thing. I can't think
of a single mathematics textbook, talk, or other purely mathematical
setti
Dear all,
For some strange reason plot loses its understanding of the system
variable 'e' if I try to plot an exponential function and do
a .subs(locals()) within the plot command. The meaning of 'e' is not
modified in the name space, but its value becomes unavailable to plot
only. See below for
Hi:
sage: P = plot(e^(ln(2)*x),-1,1)
works fine (note: e^(ln(2)*x) = 2^x) but
sage: P = plot(2^x,-1,1)
WARNING: When plotting, failed to evaluate function at 201 points.
Last error message: 'exponent (=1.0) must be an integer.
Coerce your numbers to real or complex numbers first.'
-
Dear all,
For some reason, the meaning of the global constants pi and e (and
maybe others) becomes unavailable to the plot command in the following
example. Is this a bug?
--
| Sage Version 3.2, Release Date: 2008-11-20
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