MaplePrimes - Newest Comments

Maple 16.04

Christopher2222 — Sat, 26 May 2012 02:18:08 Z

Maple 10 got up to 10.06. Since then, there has been only 2 fixes per version until Maple 15 which only saw one minor fix.

The gist behind the fewer updates were that more bugs would be fixed for the update. Unfotunately, fewer updates means a much less up to date version when the new release comes along and a less refined version.

Digits := 23 Let c be the MRB constant c

Marvin Ray Burns — Sat, 26 May 2012 01:38:18 Z

Digits := 23

Let c be the MRB constant

c := .187859642462067120248517934054273230055903094900139

Let C be Catalan's Constant.

C := .9159655941772190150546035149323841107741493742816721

evalf(-(119/19)*C-115+(479561360045/59753497176)*Pi+(525/76)*Pi^2+(102/19)*Pi*ln(2)+(353/76)*Pi*ln(3)-2*c) = -8.*10^(-21)

maybe more issues

Christopher2222 — Sat, 26 May 2012 01:00:04 Z

It seems like there are a few more issues in your code.

Do you even get a plot output? I seem to get values up to C[16] then results are no longer numeric.

Also your pointplot([C,E]) doesn't appear to be in the correct format perhaps you mean pointplot([seq([C[i],E[i]],i=1..?)]) or maybe your format is workable in newer maple versions?

Also it looks like you are using one variable as a counter. You could also use listplot...

quiet

PatrickT — Fri, 25 May 2012 21:21:27 Z

How about setting interface to quiet?
interface(quiet=true):

[C,LAGS] = XCORR(...)

herclau — Fri, 25 May 2012 15:37:18 Z

How to implement the following procedure

[C,LAGS] = XCORR(...) returns a vector of lag indices (LAGS)?

Again let c be the MRB constant and

Marvin Ray Burns — Fri, 25 May 2012 15:28:38 Z

Digits:=22

Again let c be the MRB constant and this time let b be the probability that at least two people in a room of 23 share birthday.

b:=.5072972343239854072254172283370325002359718452929878
c:= 0.187859642462067120248517934054273230055903094900139

(6200 b-239)/(2 (1550 b+437))-1 =0.187859642462067125421

(5 (1860 b+127))/(2 (1550 b+437))-2 =0.187859642462067125421

(5 (4960 b+1001))/(2 (1550 b+437))-7 = 0.187859642462067125421

0.187859642462067125421-c = 5.1725*10^(-18)

Also

evalf(23212425209 /3144920904*Pi-23 - c) = 2.*10^(-20)

That solved the problem. That you

mwb33 — Fri, 25 May 2012 13:59:05 Z

That solved the problem. That you very much.

-MWB

FFT MAPLE vs MATLAB

herclau — Fri, 25 May 2012 13:58:10 Z

@pagan

MATLAB: Definition

The functions Y=fft(x) and y=ifft(X) implement the transform and inverse transform pair given for vectors of length by:

X(k) = sum(x(j)*omega[N]^(-j(k-1)+1), j = 1 .. N)

x(j) = (sum(X(k)*omega[N]^(-j(k-1)+1), k = 1 .. N))/N

where

omega[N] = exp((-2*Pi*i)*(1/N))

is an th root of unity.

Lark, Thomas Richard, Thank you so much !

rightClick — Fri, 25 May 2012 12:31:01 Z

Lark, Thomas Richard, Thank you so much !

colon after od

pagan — Fri, 25 May 2012 12:23:08 Z

Put a colon after the `od`.

ty

docoi — Fri, 25 May 2012 11:24:28 Z

thank you, works fine

doesnt work

docoi — Fri, 25 May 2012 11:20:33 Z

thanks Patrick,

but its still not working :/. maybe i should clearify the problem to find an solution.

i dont want any shown output instead of the output given by these commands

x:=pointplot([C,E]);
with(plots):display({x});
print(C);
print(E);

When i run my code maple shows the result of every calculation step which is very annoying.

I found what I want on Mathematica 8, Thank

samah — Fri, 25 May 2012 11:04:34 Z

I found what I want on Mathematica 8, Thank you very much

Choose Maple notation for Input display

Adri vanderMeer van der Meer — Fri, 25 May 2012 10:34:06 Z

For example: e^x is not

e^x

but

exp(x)

Choose: Tools → Options → Display → Input Display: Maple Notation to get full control over your input.

Perhaps you mean:

u:= Int( (-4*(16*c+3)*exp(-1/2*sqrt(-16*c-3*Zeta)) )/
   (64*exp(-sqrt(-16*c-3*Zeta)) + 256*c*exp(-sqrt(-16*c-3*Zeta)) +
   8*exp(-1/(2)*sqrt(-16*c-3*Zeta)) +1), Zeta);

Then you can try the substitution

v := IntegrationTools:-Change...

trace

Adri vanderMeer van der Meer — Fri, 25 May 2012 10:06:14 Z

?trace or ?tracelast