| |
| |
| |
|
Page: 1 2 3 4 5 6 7 8 9 10
Comments:
<0> didn't he have a graphing option?
<0> or someone did
<1> it's not mathematica based though
<2> tell you what too, mathreader, the free read only thing, can't display stuff from the latest version of mathematica properly
<3> irbdavid: how does it **** at exporting?
<3> irbdavid: What are you trying to export?
<2> the code itself. to latex
<3> Ah, I'd probably use verbatim, and just copy the text.
<2> not as elegant that way though
<2> i quite like the way i can do '2d' stuff or whatever it's called in mathematica
<3> Have you tried TeXForm?
<3> Or possibly TeXForm[StandardForm[expr]]
<2> i dont get how you use that with a whole notebook though?
<3> hmm
<3> File -> Save as Special -> TeX?
<2> i get a whole mess of stuff then. mathematica's own brand of fonts etc
<2> why can't they just dump a nice vanilla .tex file.... its like MS and html
<2> you got mathematica there Cale ?
<0> msword dumps a ****ty html
<3> yeah
<1> to promulgate vendor lock-in?
<2> can i dcc you a bit of what im doing. get your opinion on the way it's written?
<3> okay
<3> --- Received a malformed DCC request from irbdavid.
<3> --- Contents of packet: DCC SEND Expansion.nb -1062731774 1024 444999 T
<2> get that through okay?
<3> yep
<2> thats a slightly older version of what i'm doing now. havent got the most recent to hand
<2> critical part is the definition of 'omega' , with the term omegafunction in it
<2> omegafunction gets calculated numerically, as an interpoltionfunction in the main loop bit, and then the stuff under model formulae gets plotted with this omegafunction included. all works fine untill you want to change a few of the other terms in those expressions that rely on omega and re-plot them
<3> hmm, For loops :)
<2> seemed the most logical way to do things....
<2> im sure that that interpolation function can be generated in a more elegant way. its just a system of equations after all
<2> but the super-position of plots seems best done with a for loop.
<3> I don't think I've ever actually used For in Mathematica. I tend to use Map/Nest/NestList/FixedPoint/Fold/etc.
<2> only two plots are shown in each case in that notebook, but i have others with more
<3> (or direct recursion :P)
<3> but okay, hmm
<2> that point about defining expressions using := rather than just = might be a good idea in the definition of omega etc though
<3> Yeah, := tends to be a little nicer, though it can be less efficient.
<3> A nice trick to know, don't know if you have any use for it here, but it comes in handy from time to time is to define functions like f[x_] := f[x] = ...
<3> That will cause them to be automatically memoised when they're evaluated.
<3> (If you do it in the wrong places, you can obviously chew up a lot of memory though :)
<2> i run mathematica on a quad proc with 16gb of ram :p
<0> jesus
<0> please tell me you game on it to
<2> but then i share that box with about 15-30 other people doing various things...
<3> Hehe, that's more reasonable
<2> most of them using IDL, which is a hog for cycles if ever there was one
<3> I have 1GB in my personal machine. Plotting certain things in mathematica can still cause me to come close to running out.
<4> you probably use windows
<4> :P
<3> I use Debian
<2> yeah i noticed that plotting/rendering causes the most struggle for mathematica
<2> solving a stiff DE took a fair while too. but that didnt really result in any interesting plots, so took that out in the end.
<3> http://cale.yi.org/autoshare/logarithderiv.png -- iirc, this took quite a lot of memory
<3> http://cale.yi.org/autoshare/arithderiv.2.png -- and this one, which is the same thing, without the log scale
<0> i like the logarithderiv.png
<5> hehh.. i eh.. wana ask a question but you know, its pretty reatarded..
<5> i kinda er, droped out of HS.. could someone remind me how to subtract fractions?
<5> say 2/1 - 2/3
<6> a/b - c/d = (a*d - b*c)/(b*d)
<6> so 2/1 - 2/3 = (2*3 - 1*2)/(1*3) = (6 - 2)/3 = 4/3
<5> thanks
<5> alright, i got it, thank you man.
<7> hehe
<5> suppose you have 1/9 - 2/3 = (1*3 - 2*9) / (3*9) = -15/21
<5> is both the 15 and 21 negative??
<6> 3*9 = 27
<6> so you get -15/27.
<6> which is (-15)/27 or (15)/(-27), but not (-15)/(-27)
<5> hehehh haha. yeah
<5> well like i said.. i use to be good at doing algerbra but, i never really learned my multiplication tables and i havnt done any math in about 3 years
<8> How many ordinal numbers are there?
<8> Non-cardinally many?
<3> ihope: yeah
<8> That's annoying, eh?
<3> Sets have limitations
<8> Yep. There's that set of all sets that aren't members of themselves...
<8> And the less pesky set of all sets that *are* members of themselves.
<3> well, those aren't sets
<7> way to cop out bertrand russel
<9> .
<1> does anyone know the name of when you write an integer as a_1 + a_2*2 + a_3*3 + ... + a_n*n, where 0 =< a_i < i ?
<1> so i can google for it?
<10> it's called a sequence
<10> actually a sum if you're adding them together
<10> so google for 'series;
<1> it's like decimal notation, but with a different base for each digit
<1> thx fez i was hoping for something a little more specific
<11> mnvl: something like this? http://en.wikipedia.org/wiki/P-adic_number#p-adic_expansions
<12> hmm mbot really slow
<12> list
<12> george is getting angry
<12> whos bot is mbot ?
<12> I need it to solve 4.9t^2+100t+75
<12> syntax ?
<12> %Solve 4.9t^2+100t+75
<13> % Solve[49/10 t^2+100 t + 75 == 0, t]
<14> Failure02: {{t -> (5*(-100 - Sqrt[8530]))/49}, {t -> (5*(-100 + Sqrt[8530]))/49}}
<12> how do i say 'give me reals' ?
<13> you want numerical values?
<15> Those are reals.
<13> % Solve[49/10 t^2+100 t + 75 == 0, t] // N
<14> Failure02: {{t -> -19.628367256341892}, {t -> -0.779796008964231}}
<12> thx!
<12> % List
<14> im_with_stupid: List
<12> @localtime
<12> %localtime
<12> where is the manual for mbot
<13> check topic.
<12> !topic
<12> lol
<12> thx Failure02
<1> not quite litost they are using p^n
<1> i realised my expansions shld actually be a_1 + a_2*2! + a_3*3! + ... + a_n*n!, where 0 =< a_i < i
<1> but still don't know what theyre called..
<13> factoradic
<16> would just like confirmation on syntax.... written in a text book: -3^(2) = (-1)(3)^2 = -9
<16> not (-3)^2=9
<16> correct?
<9> yes baby
<9> ^has a higher priority
<16> yes, but try -3^2 in a calculator
<9> well there's a difference between calculator input and regular math notation
<16> right
<17> not necessarily.
<9> for the calc you gotta check whatever its manual says (the input differs from calc to calc)
<16> it's unfortunate that it doesn't interpret it correctly. I wonder what something like mathematica would spit out
<17> it depends on what you consider "-3^2" to mean
<9> Flannel :?
<16> I agree
<17> Well, if you consider "-3" as a single number, just like 3 would be
<16> for example, 1-3^2 gives the correct result
<17> then the answer is 9
<16> of -8
<9> Flannel : standard notation isn't really open to interpretation
<17> however, on CALCULATORS, you have two different keys, (+/-) and - so the +- is bound tightly to the integer
<17> kmh: -3 is 3 units to the left, on a standard number line. -3 is an integer, not an expression
<9> Flannel :?
<17> kmh: what's unclear?
<9> the whole sentence - what are you talking about now
<17> kmh: do you disagree that -3 is a number, and not an expression?
<17> or rather, do you disagree that it's an expression, and not a number
<16> -3 = (-1)(3) and if interpreted that way, there should be no issue
<9> Flannel : that doesn'r really matter
<18> Write the equation of a line which contains the point (4,3) and (2,5). Can I get some help on this? Once again, no frecking exaple to go by.
<9> Evil|Server : in vector/parameter form or in y=mx+b form ?
<17> or Ax+By = C?
<18> y=mx+b forum. And I must first find the slope and then use the point slope formla.
Return to
#math
or
Go to some related
logs:
ubuntu tvtime line-in sound
etch gpdf evince xpdf acroread
pyxmms audacious
#perl
Dependency is not satisfiable: xlib
#perl
pixart imaging suse
#math
Debian+port 6667 blocked
#suse
|
|
