In a message dated 1/3/2009 8:44:30 P.M. Eastern Standard Time,
rober...@math.washington.edu writes:
Also, it's unclear how much of
a "hole" you would want to see--mathematically even one pixel would
be too large.
Sorry, I suppose I'm spoiled by using the TI-89 graphing calculator,
Hi Shing,
try
http://code.google.com/p/latexmath2png/
a Python project, can be used as a command line tool as well as a
Python module,
and has more options, for example it is possible to specify a latex
preamble,
and it has a better margin fitting (I tried out the example suggested
by William an
On Jan 3, 2009, at 4:33 PM, calcp...@aol.com wrote:
> Exactly, the function log base 2 of x is not defined at 0.
> So, why won't sage return some sort of domain error?
Sage doesn't test to see if the function is defined on the whole
domain (if this is even a decidable question in general, and
On Jan 3, 5:05 pm, "William Stein" wrote:
> On Sat, Jan 3, 2009 at 4:48 PM, mabshoff
>
>
>
> wrote:
>
> > On Jan 3, 4:33 pm, calcp...@aol.com wrote:
>
> > Hi AJG,
>
> >> Exactly, the function log base 2 of x is not defined at 0.
> >> So, why won't sage return some sort of domain error?
>
> > W
On Jan 3, 5:01 pm, calcp...@aol.com wrote:
> That's another issue: how do I know which package SAGE is using for a
> particular task. You mention there may be a problem with maxima or
> numpy, how are we to know?
Well, this can be simple or difficult to find out, but in most cases
some develope
On Sat, Jan 3, 2009 at 4:48 PM, mabshoff
wrote:
>
>
>
> On Jan 3, 4:33 pm, calcp...@aol.com wrote:
>
> Hi AJG,
>
>> Exactly, the function log base 2 of x is not defined at 0.
>> So, why won't sage return some sort of domain error?
>
> We call numpy for the numerical roots and I guess this might b
That's another issue: how do I know which package SAGE is using for a
particular task. You mention there may be a problem with maxima or
numpy, how are we to know?
TIA,
AJG
A. Jorge Garcia
Teacher and Professor
mailto:calcp...@aol.com
ftp://ftp.baldwinschools.net
http://calcpage.tripod.com/bs
On Jan 3, 4:33 pm, calcp...@aol.com wrote:
Hi AJG,
> Exactly, the function log base 2 of x is not defined at 0.
> So, why won't sage return some sort of domain error?
We call numpy for the numerical roots and I guess this might be a bug
there, but we will check. Somebody please open a ticket
Exactly, the function log base 2 of x is not defined at 0.
So, why won't sage return some sort of domain error?
I noticed something similar when I plotted (x^2-1)/(x-1) and got the
graph of x+1.
I was hoping for a removeable discontinuity to show in the graph!
IE a hole in y=x+1 at x=1.
TIA,
AJ
William Stein wrote:
> On Sat, Jan 3, 2009 at 4:15 PM, gerhard wrote:
>> What I am after is to interact with sage from yet another language.
>> To do so, I need to start python from my own code.
>> Interestingly, when I invoke the python interpreter,
>> I do have access to all of the sage functio
gerhard wrote:
> What I am after is to interact with sage from yet another language.
> To do so, I need to start python from my own code.
> Interestingly, when I invoke the python interpreter,
> I do have access to all of the sage functionality,
> as well as commands added by my code, e.g.,
>
On Sat, Jan 3, 2009 at 4:15 PM, gerhard wrote:
>
> What I am after is to interact with sage from yet another language.
> To do so, I need to start python from my own code.
> Interestingly, when I invoke the python interpreter,
> I do have access to all of the sage functionality,
> as well as comm
On Jan 3, 4:10 pm, calcp...@aol.com wrote:
> sage: plot(x^2*log(x,2)-1, 0,2)
> [nice plot so you can understand what is going on]
>
> sage: find_root(x^2*log(x,2)-1,1, 2)
> 1.4142135623730951
> <<
>
> Hi, I'm trying out SAGE for the first time, so I entered what you
> suggested (see above).
>
>
On Jan 3, 2009, at 4:10 PM, calcp...@aol.com wrote:
> sage: plot(x^2*log(x,2)-1, 0,2)
> [nice plot so you can understand what is going on]
>
> sage: find_root(x^2*log(x,2)-1,1, 2)
> 1.4142135623730951
> <<
>
> Hi, I'm trying out SAGE for the first time, so I entered what you
> suggested (see abov
What I am after is to interact with sage from yet another language.
To do so, I need to start python from my own code.
Interestingly, when I invoke the python interpreter,
I do have access to all of the sage functionality,
as well as commands added by my code, e.g.,
sage: foo
>>
sage: plot(x^2*log(x,2)-1, 0,2)
[nice plot so you can understand what is going on]
sage: find_root(x^2*log(x,2)-1,1, 2)
1.4142135623730951
<<
Hi, I'm trying out SAGE for the first time, so I entered what you
suggested (see above).
Now, from the plot, it there seems to be no other roots betw
On Sat, Jan 3, 2009 at 9:00 AM, Slava wrote:
>
> When i try to solve this equation:
> solve(x^2*log(x, 2) == 1, x);
> It answers me:
> [x^2 == log(2)/log(x)]
> It,s true, but how can i get the numerical value of x?
>
sage: plot(x^2*log(x,2)-1, 0,2)
[nice plot so you can understand what is go
On Dec 30, 2008, at 1:55 PM, ggrafendorfer wrote:
> Hi,
> I'm not sure, but I guess this is considered as a bug, please let me
> know and I report it to trac:
>
> sage: a = RealField(100)(5) + float(5); type(a); a.prec()
>
> 100
> sage: a = float(5) + RealField(100)(5); type(a); a.prec()
>
> 10
great! this did indeed work.
Thank you,
-gerhard
--
import os
filename = os.tempnam('./','aaa') + '.png'
r.png(file='"%s"'%filename)
a=r([1.e-35,2.e-35,3.e-35,6.e-35,7.e-35,8.1e-35]);b=r([4,5,6,12,3,6])
r.plot( a, b, col=2, xlab='"%s"'%'
On Sat, Jan 3, 2009 at 1:38 PM, gerhard wrote:
>
> Trying to use R for plots,
>
> sage: import os
> sage: filename = os.tempnam('./','aaa') + '.png'
> sage: r.png(file='"%s"'%filename)
> sage: a= r( [1.e-35, 2.e-35, 3.e-35, 6.e-35, 7.e-35, 8.1e-35 ])
> sage: b= r( [4, 5, 6, 12, 3, 6])
> sage: r.p
On Jan 3, 3:35 pm, "William Stein" wrote:
> On Sat, Jan 3, 2009 at 1:29 PM, gerhard wrote:
>
> > I used IPythonShellEmbed to embed python (and sage) in my own code,
> > and got it to work from the command line, giving me access to my own
> > code as a built in module.
>
> > Trying to switch to
On Sat, Jan 3, 2009 at 1:29 PM, gerhard wrote:
>
> I used IPythonShellEmbed to embed python (and sage) in my own code,
> and got it to work from the command line, giving me access to my own
> code as a built in module.
>
> Trying to switch to the notebook interface however looses
> access to the
On Sat, Jan 3, 2009 at 2:08 PM, Shing Hing Man wrote:
>
> Is there a command in SAGE that converts a latex expression to png (or
> gif) directly.
>
> The following post in the archive has a workaround.
>
> ttp://groups.google.com/group/sage-support/browse_thread/thread/570022e72a22d3bd/517d51a58a
Is there a command in SAGE that converts a latex expression to png (or
gif) directly.
The following post in the archive has a workaround.
ttp://groups.google.com/group/sage-support/browse_thread/thread/570022e72a22d3bd/517d51a58abc67f8?lnk=gst&q=Latex+to+png#517d51a58abc67f8
I wonder if there
Trying to use R for plots,
sage: import os
sage: filename = os.tempnam('./','aaa') + '.png'
sage: r.png(file='"%s"'%filename)
sage: a= r( [1.e-35, 2.e-35, 3.e-35, 6.e-35, 7.e-35, 8.1e-35 ])
sage: b= r( [4, 5, 6, 12, 3, 6])
sage: r.plot( a, b, col=2, xlab='x', ylab='y' )
sage: r.dev_off()
gets me
I used IPythonShellEmbed to embed python (and sage) in my own code,
and got it to work from the command line, giving me access to my own
code as a built in module.
Trying to switch to the notebook interface however looses
access to the module. Where would I need to look
to figure out what might b
When i try to solve this equation:
solve(x^2*log(x, 2) == 1, x);
It answers me:
[x^2 == log(2)/log(x)]
It,s true, but how can i get the numerical value of x?
--~--~-~--~~~---~--~~
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