Hi
The problem is in scaling the arrows. I used "arrow". look for plots with
"arrow".
http://sage.math.canterbury.ac.nz/home/pub/138 (2d is at the bottom- no
problem, 3d is in the middle and requires jmol)
http://sage.math.canterbury.ac.nz/home/pub/142
Original credit for this idea is to Ka
I know this is probably not so important in the grand scheme of things but
I was helping my DIL (daughter in law) with numerical maths class
(electrical engineer) and at every step I found Matlab/Octave with their
"major" commands obscured what was happening. For example, she needed to
approxim
new video
http://www.youtube.com/watch?v=cx6cx788aHc. Hope I got it correct and sorry
to be so slow. :)
Best, Linda
On Thursday, 7 February 2013 14:08:41 UTC+1, William wrote:
>
> On Wed, Feb 6, 2013 at 2:06 PM, Keshav Kini >
> wrote:
> > LFS > writes:
> >
>
Hiya John,
When I saw this I realized that Sage could parametrize the intersection of
two surfaces given explicitly! Absolutely cool.
Thanks for your reply and Asad for your question.
var('x y z')
f(x,y)=(6 - 3*x - 2*y)/6
g(x,y)=(2 + 2*x + 9*y)/11
P1 = plot3d(f, (x, -5, 5), (y, -6, 6), color='r
Question: With the iPython notebook - do you get the sage notebook, that
is do you get the ability to put in html code as text? Thanks. Linda
BTW: Is sagenb.org closed to new registrations? (I just started my new
semester and one of my kids complained. Sorry to go off thread.)
On Wednesday, 6
fonts rather small - i used dpi=50 (I am sure you can fix
this with font size on the labels ...)
On Thursday, 31 January 2013 17:08:55 UTC+1, Harald Schilly wrote:
>
>
> On Thu, Jan 31, 2013 at 4:50 PM, LFS >wrote:
>
>> Here is the minimal code version
>
>
>
Hiya Harald - I will try. I am really, really bad with forums. That is why
I posted the link to the public page. I think the version is 4.8. (Can't
use sagenb since no public posting.)
Here is the minimal code version I used in an example (for people like me
who don't understand all the program
> It is SO unfortunate that the sagenb.org published worksheets had to be
> turned off - often a half hour of searching there yielded untold stores of
> fruit.
>
>
1. It REALLY is unfortunate. I used those published worksheets ALL the
time. Without them I NEVER would have continued on with Sag
Hi guys - I am sure that there is much more available. But actually William
you hit the nail on the head. The page I used was "a small undergraduate
student project" and its contents are useful and accessible. That is the
level I want - so a student or someone like me can use Sage in place of
Thanks. If asked, I vote for "opacity". It is memorable. :)
On Wednesday, 30 January 2013 10:34:04 UTC+1, P Purkayastha wrote:
>
> On 01/30/2013 05:02 PM, LFS wrote:
> > I don't know if you are desperate (then this is a decent idea) or trying
> > to teach other
I don't know if you are desperate (then this is a decent idea) or trying to
teach others (not so good an idea)
When desperate, I add invisible points and use show(). (Unfortunately
invisible points depend on your plot type since alpha=0 is for 2d and opacity=0
is for 3d...HINT to developers to c
Thanks for the reply! I used everything I found on this:
http://www.sagemath.org/doc/reference/sage/stats/basic_stats.html and I had
looked at 9671 and said "Argh".
> kcrisman wrote> On an unrelated note, I'll put in a plug for some
> enterprising people to make m
I have to admit that I did not find very much in sage for descriptive
statistics.
I have put what I found in my sagemath page:
http://sagemath.wikispaces.com/Statistics
If anyone can add anything to this, that would be great.
I really want sage - my goal is sage as a reasonably easy to use foss
the typed value to infinite precision and
> converts to a fixed precision (53-bit if implicit) upon demand. This
> is needed so that RealField(1000)(1.2) is 1.2 to 1000 bits, not just
> 53 bits (as it would be if 1.2 was parsed to 53 bits then passed in to
> RealField(1000)).
>
>
Hi - I would appreciate if someone could point me to a link explaining the
difference (if there is a difference) between:
*
* (Here I input x=3.)
** (Here I input xx=float(3))
** (Here I input 1/x)
.
My page: http://sage.math.canterbury.ac.nz/home/pub/247
Thanks so much, Linda
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http://sage.math.canterbury.ac.nz/home/pub/246 (Sorry posted notebook and
not published version.)
Linda, I wasn't able to access your notebook.
>
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Thank-you. Perhaps we could add that somewhere, e.g.
http://modular.math.washington.edu/edu/2012/1062/projects/final/le-kofmehl/Math480_Quick_Reference_Statistics_Final.pdf
I tried everything on this page, everything on the forum, absolutely
everything I could find doing a search on: sage plot hi
Very badly written since I am in a hurry - IMHO:
After struggling for the last 2 weeks, I would say Excel and GeoGebra have
more functions for the statistics math classroom (e.g. RandomBetween,
CountIf). They are much more intuitive and better documented.
And it seems to me that Sage without num
P.S. the animation iterates 5 times and stops (you can see the code *
iterations=5*) so if the point stops moving before you get all there, just
change the number or reload. :)
>
>
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Hi - I am like the a total amateur with sage, but here is a page that I did
with animation - credit: Nils Brun
http://sage.math.canterbury.ac.nz/home/lfahlberg/58/ I see it is still
working. It has 5-6 plots so with the current java problems, be prepared to
click on Run a gazillion times.
The a
Hiya Burcin,
Thanks for reply!
For my cubic polynomials p0 and p1, I did get the following to work:
p0=p.series(x==xD[0],4)
p1=q.series(x==xD[1],4)
print p0; p1
x |--> 1.0601 + 0.59497*x +
(-0.08502)*x^3
x |--> 1.5698 + 0.34008*(x - 1)
Little more: I see canterbury is using 4.8. Maybe this is fixed in version
5?
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s
Hiya, Probably I am just doing something wrong ...
I have a cubic polynomial p(x) with "regular" coefficients and I wanted
coefficients around e.g. (x-1). So I did p1=p.taylor(x,1,3).
I get:
x |--> 0.085*(x - 1)^3 - 0.255*(x - 1)^2 + 0.34*x + 1.23
The polynomial is correct, but look at the last
Short letter indeed! Full of extremely useful information on so many
levels. Thank-you SO much. Linda
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Thank you Harald. Actually, I think I do need the whole list/array with the
function evaluated - either as a list or an array. (I am working the
TriDiagonal Algorithm.). I am an "in-between" person. I have found that the
students make no connection between their engineering classes that often
u
Thanks indeed Juan, it did help immensely! I couldn't get array to work and
your example finally clicked for me.
In the end, I used: w=numpy.array([cos(x0+j*h) for j in range(n+1)], float)
THANKS. Linda
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P.S. Sorry there is an error in the above post. Of course the counter
should be integer.
This is the best I could do.
x0=0.;xend=2.*pi;n=8.;h=(xend-x0)/n;
y=numpy.ones(n+1)
y=[y[j]*cos(x0+j*h) for j in [0..n]]
y
If anyone knows of an easier or more intuitive way OR how to this array to
print *on
Hiya Jan, Probably you are after more sophisticated users than me (I teach
undergraduate and graduate engineering mathematics), but I did not
understand question 2. (I could never get how to download Sage so I use it
on my windows machines via the Chrome browser. Since the publisher on
sagenb.o
Hiya all - Firstly Happy Holidays and a Good New Year in 2013 (no cool
dates anymore though like 20:12 20-12-2012)
Anyway - I have looked everywhere for days and days.
How do you generate a numpy array like X[j] where e.g. X[j]=cos(j) for j in
[x0,xend,step=h]. I have a count number n.
I can't im
Thank-you both!
The 'break' did what I wanted for now and will test os._exit() in a bit.
Really appreciate your help.
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How do you get sage out of a loop early?
How do you get sage to totally stop in the middle of a block?
for n in (0..2):
for m in (0..3):
p=2*m
print p
if p==2:
print 'I want out of loop'
m=4
if n==1:
print 'I want to stop Sage'
print 'Did not stop Sage'
I want to get o
Oh I agree Dave for several reasons (not least of all that Excel is not
free, nor is it math based).
However I have to admit that I have not been happy with any non-Excel
program for just "teaching" probability and statistics.
Too complicated and the kiddies will give up. It took me 4 days to ge
.
On Sunday, 21 October 2012 13:56:06 UTC+2, Dima Pasechnik wrote:
>
> On 2012-10-21, LFS > wrote:
> > --=_Part_87_6472836.1350820122321
> > Content-Type: text/plain; charset=ISO-8859-1
> >
> > Actually Dmitrii with this change it is giving me exactly the same
&
I am not sure, but your image looks like the bottom histogram, which is the
normal distribution.
The middle histogram is from the empirical data.
Linda
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Actually Dmitrii with this change it is giving me exactly the same
empirical data each time!
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Done. Thanks
On Sunday, 21 October 2012 13:35:02 UTC+2, Dima Pasechnik wrote:
>
> On 2012-10-21, LFS > wrote:
> > --=_Part_2721_6851258.1350818261101
> > Content-Type: text/plain; charset=ISO-8859-1
> >
> > Thanks Dave - If I have a moment I will try the
Sorry Dmitrii to continually be typing your name wrong (using the
Macedonian spelling where I live :)). Linda
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Yes - I think Dimitri's solution is working! (I changed the published file
to his algorithm and upped the number of sets ns for the CLT and I also
seem to be now be getting good empirical data.)
Thank-you all! Linda
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Thanks Dave - If I have a moment I will try the scatter plot method to
check. That seems like a useful idea for student.
(This was just for a class lesson on testing the CLT and I am way over my
time allotment :))
Thanks to both you and Dimitri for feedback!
Linda
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Hiya Dave,
What would the line of code look like to reseed it with the epoch thing
each time I call it?
Thanks so much,
Linda
>
>
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Hiya Dimitri, It might actually be working. Not sure, but when I increased
the number of sets ns, it does looks better. Still alot of repeats, but the
histogram looks better. Linda
On Sunday, 21 October 2012 12:30:13 UTC+2, LFS wrote:
>
> Hiya Dmitrii
> Thanks so much for your quick r
Hiya Dmitrii
Thanks so much for your quick reply, but I am still getting the same
problem.
> I go to excel and use a RandBetween[1,1000] and just sort them according
> to my probability and all is good, i.e. the histogram of the expected
> values is "normally distributed".
>
Here I keep getti
Hiya guys!
I have a function:
def GDD(num,P):
D=GeneralDiscreteDistribution(P)
D.reset_distribution()
L=[D.get_random_element() for _ in range(num)]
return L
and then commands
P=[0.5,0.33, 0.17]
L=GDD(num,P)
I am definitely not getting random distributions within my lists L (i.e.
Hiya -
I have had this experience myself even with rather simple functions and
small intervals with sage (and with various other programming and math
apps).
Feel free to ignore this ...
I am a complete ignoramus at how sage works, but my experience has been
that you should try nudging your inte
Oh - I wondered why they were disabled. Finally saw this.
I am wondering does "disabling" javascript mean no embedded GeoGebra
worksheets?
Could we have a list of "safe" users?
Thanks,
Linda
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Hopefully doing this correctly since not exactly a "question". Just wanted
to make sure this group new about this.
Special Issue for Papers: Tbilisi Mathematical Journal TMJ, Symbolic
computation with Sage in mathematical education and research.* Link at
bottom of:*
http://tcms.org.ge/Journals
Hiya. Probably I have either done something wrong or this is a precision
issue I should know about if I programmed. Please excuse.
http://sagenb.org/home/pub/4706
I wanted to plot the level curves of a f(x,y,z)=sqrt(x^2-z) for C=0, 1, -1,
2, -2.
So I typed in
implicit_plot3d(sqrt(x^2-z)==0, (x,
No - because I now see it was my error. Very sorry. Should never write
in at night :)
Argh, Linda
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h
Hiya - is there something new in parameter_plot?
I was using parameter_plot for both 2d and 3d plots and now something
is not working.
Thanks, Linda
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esn't work. (I copied the text of the working code into a new
worksheet, immediately saved and published; after that no changes were
allowed to be saved :).)
@Nils
Is there a way to have a delay between iterations of the whole cycle?
Thanks!
Thank-you all for your support. Linda
On Feb 8,
y the reitteration (of
the entire cycle)?
Thanks again to everyone for their support.
Linda
On Feb 8, 6:09 pm, LFS wrote:
> @Nils
> Got the animation to work - Really pleased! (Momentarily nothing will
> publish - when it does I will add the link.)
> Thanks for writing the script so simp
@Nils
Got the animation to work - Really pleased! (Momentarily nothing will
publish - when it does I will add the link.)
Thanks for writing the script so simply. I was able to change things I
wanted to change.
BTW - if anyone copies and pastes the script from above, there is an
bad line break afte
as long as you think it will :)
In my graduate courses, I do in-class demos and then assign "similar"
problems where they create worksheets themselves. (This is mostly
probability and statistics to IT engineers and we use scratch.)
and on and on i go Linda
On Feb 7, 2:22 pm, Jaso
d about where I find
things.
Best, Linda
On Feb 6, 9:39 pm, kcrisman wrote:
> On Feb 6, 2:58 pm, Socius wrote:
>
>
>
>
>
>
>
>
>
> > On 6 Feb, 18:57, LFS wrote:
>
> > > I have to admit that I use GeoGebra for almost everything not 3d. I
y kids to test their probability
results).
On Feb 6, 5:31 pm, Socius wrote:
> On 5 Feb, 17:20, LFS wrote:
>
> > Hiya!
>
> > Is there a relatively simple way to get a point to animate a point
> > through a cycle keeping in mind my low programming skills ((like
> >
Hiya!
Is there a relatively simple way to get a point to animate a point
through a cycle keeping in mind my low programming skills ((like
adding a "wait" between iterations?) ?
I made this video with stop animation and an animated gif but it was a
real pain.
http://www.youtube.com/watch?v=2ddeHKk
Thanks! Both of these tips are very important to me so extra thanks.
Linda
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Just adding one more comment for search purposes:
If you see your equation being cut off from text field into sage
field, it means your translator is using 3 braces in a row {{{
Sage interprets {{{ as the beginning of a sage field. So check your
translation.
I had this problem using my equation
Found problem. The mathjax works great if all equations are properly
input!
However in sage editor, if you have an open tag and you edit
before the end tag, it will sometimes do a "dreamweaver" thing
of closing the tag and reopening it. You cannot see this in the
editor.
This may happen even if
ish
editors did not want to help me :)
Best, Linda
On Jan 27, 7:55 pm, Jason Grout wrote:
> On 1/27/12 11:11 AM, LFS wrote:
>
> > Hiya Jason
> > Thanks Jason for reply!
>
> >http://test.sagenb.org/home/pub/27
>
> > Everything seems to work fine.
> > Howev
tags that
mathjax cannot understand (and you don't see here, but do see in the
html)).
On Jan 27, 4:04 pm, Jason Grout wrote:
> On 1/27/12 8:34 AM, LFS wrote:
>
> > Hiya - we are looking at an array inside big left brace ...
>
> > On my wikispaces page (you have to open the
Hiya - we are looking at an array inside big left brace ...
On my wikispaces page (you have to open the + details ...), big brace
renders properly.
http://sagemath.wikispaces.com/Surface+integral+function
However
On the sagenb page, you get encoding problems: http://sagenb.org/home/pub/4147/
Thanks so much! Linda
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Thanks Jason for everything you are doing. I would really appreciate
it if you would write here when we can publish 3d plots in sagenb.
Thanks kcrisman for the confirm. At least I now know that I am not
doing it wrong.
Best Linda
On Jan 18, 1:36 am, kcrisman wrote:
> > > BTW: I cannot get mesh=
Hiya Jason. That is what I assumed. But I need the 3d plots to
publish :) So back to canterbury and 4.7.
BTW: I cannot get mesh=True, dots=True or plot_points=[n,m] to work
with plot3d.
There is no sample at the documentation:
http://www.sagemath.org/doc/reference/sage/plot/plot3d/plot3d.html
I
Hiya Jason,
Yes, it works - that is, 3d plots are published.
http://test.sagenb.org/home/pub/23/
However, I am confused; is this a stable version of sage? Should I
work on this notebook? Sorry, I don't really understand all these
different websites.
Thanks,
Linda
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Thanks so much everyone for working on this.
1. Tested again at sagenb with newly published worksheet:
http://sagenb.org/home/pub/4060/
The 3d plots are still NOT being published.
They publish on both the
4.7 http://sage.math.canterbury.ac.nz/home/pub/141/ and
4.7.1 http://dev.math.canterbu
Thanks Rych! I appreciate your testing both the animation and the 3d
plots.
I see the http://dev.math.canterbury.ac.nz/ is 4.7.1 Is this a
permanent site?
Is there a document that tells the differences between 4.7, 4.7.1 and
4.7.2? (So far I have only found that line3d doesn't work in 4.7.)
Agai
Thanks Alistair!
I have been using the 4.7 notebook as it publishes 3d plots (the 4.7.2
does not), but your remark sent me back to the 4.7.2 notebook and
voila - it must have ImageMagik on that service - since I got an
animation to work!
Really appreciate all the help everyone!.
Linda
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Sorry Dan - I know how to click on "download" and then double-click on
a "setup.exe" file. I am math, not programming.
I have a windows machine. I went here:
http://www.imagemagick.org/script/install-source.php#windows.
I was completely overwhelmed by the directions.
But, thanks very much for the
Hi - I seem to be always asking questions...
I wanted to animate flux. I found these links:
http://www.sagemath.org/doc/reference/sage/plot/animate.html and
http://wiki.sagemath.org/animate
I tried the code, but it would not evaluate. It wanted me to install
something called ImageMagick, which appe
Many thanks! Linda
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Hi
I looked around quite a bit but probably not in the right places?
I found I can define a vector function and how to get its derivative
vector function.
Is there a way to get at the component functions and/or a way to
calculate the magnitude function of rprime?
var ('t')
r=vector(t,t^2,t^3)
rpri
I have noticed that this published worksheet has plotted 3D plots
http://sage.math.canterbury.ac.nz/home/pub/83/
Maybe because it is on a different server?
BTW: Katie - if you are reading this, I love this worksheet. I wanted
to write you and rate it, but I didnt' see how. Thanks!
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Thank-you for all the replies! I appreciate all the help.
== 2d plots are generated with jmol in the published worksheets;
== 3d plots are NOT generated.
== (If possible) I want my user/viewer to be able to view the
published worksheet without having to install anything (except be java
enabled).
Hi - I am a new user of sage, but I very much like the ability to do
(better than) mathematica quality mathematics and 3d plots legally :)
However, when I publish my sage worksheet so that I can link to it and
a non-sage user can view it, the 3d plots are not generated (neither
plot3d nor implicit_
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