I want to download historical data from google finance for two Indecies simultaneous
but I dont understand where the output is saved...?!  Also should I use task or threads ?


restart:
with(Sockets):
with(Threads):


X1 := proc () local str, sid; global b; str := "";

sid := Open("google.com", 80);
Write(sid, cat("GET /finance/historical?q=INDEXSP:.INX&histperiod=daily HTTP/1.0 \n\n"));

b := Read(sid); while b <> false do str := cat(str, b...

What's wrong?
I need to minimize (z-Z) ^T.E^-1. (z-Z).
How can you see in the first Call to LSSolve worked. By introducing objectivejacobian I have problems

Recently, I submitted for publication to a peer-reviewed math journal

a formula for the n-th order implicit derivative given an implicit function G(z,w)=0.

i.e. dz/dw = - Gw/Gz where Gw and Gz are partial derivatives of G with respect to w and z, respectively. Anyway, I proved the general formula for d^n z/ dw^n.   I have since proved the generalization of this to implicit functions of several variables, G(z,w1,w2,...,w(N))=0. A good mathematician...

PDE:  u_tt=c²u_xx+f(x,t)   ; f(x,t)=a*sin(2*pi*t/P)

BC: u(0,t)=0,u(L,t)=0;

IC: u(x,0)=0,u_t(x,0)=0;

who can show me the steps by using maple? and i need help to plot the graph as well. thx!

Is there a function in Maple which allows to send emails?
I am bulding a maplet where I want maple to send a email
as a reminder at the end of each month to a specified emailadress

Is this possible ?

Hi,

imagine I have the following line:

(y/2)*(4/3)*sin(x);

can I tell Maple not to merge everything together? I want to have it all seperated, like a separate fraction for y/2 another for 4/3 and then comes the sine, with small spaces between them, indicating multiplication.

thanks.

If I type FormatTime() then I get todays year,month and day.

What should I type if I want the year, month and day one month ago?

I am just moving from Mathematica to Maple, since I just found out Maple is better suited to my needs. I checked some basic functions, and Maple seems to be pretty perfect. However, I cannot find a way to do a revolution plot. In Mathematica I usually used the command RevolutionPlot3D. But here, in Maple, I cannot find a way to do it. Can someone help?

Here is a sample of what I am talking about:

Most of the comparisons (that I've seen so far) amongst Maple, Matlab, and Mathematica are either incomplete, inaccurate, or biased.

This collection of three articles [1 (1), 2 (2),

I can`t solve this equation

 rtoc(x,y,z):= < sqrt(x^(2)+y^(2)) | if 0<x then (arctan(y/(x)))else (Pi+arctan((y)/(x)) )end if  ; | z     >

I am a new user migrating my calculus labs from Derive to Maple.

One exercise asks the student to "write a program" to convert coordinates of a point between 3-D coordinate systems. 

I have tried the function definition given above and the error message is "unable...

Assuming I have a general function f(x). The derivative with respect to x would be: df/dx .

I now want to rescale, which basically means that I want to change x to a*y where a is a parameter (general constant) and y is my new variable.

If I use

subs( x=a*y, df(x)/dx )

I get

d/d(a*y)  f(a*y)

but 'a' should be a parameter, so this should give

1/a * df(a*y)/dy = df(y)/dy

How do I tell that to Maple?

I know that I have raised this question before, and also got some responses.

However, I cannot find the thread, and I'm still interested in what is going on.

I don't have a clue.

restart;
f:=proc(a)
plot(sin(x),x=0..Pi);
#plot(x^3,x=0..1);
#plot(undefined,x=0..1);
a^2   
end proc:

#Now try plotting what should be the parabola y = x^2 on the interval -1..1:
plot(f,-1..1,adaptive=false);
plot(f,-1..1);
plot(f(a),a=-1..1);

Another pointplot3d animate problem

when the axes option is not specified the view option magnifies the symbols when symbol=circle
The field of view is not increased as it should.

animate(pointplot3d, [[[1, 2, 3], [4, 5, 6], [2, 2, 2]], color = blue, symbol=circle, orientation = [A, A]], A = 45 .. 405, view = [-100 .. 100, -100 .. 100, -100 .. 100], frames = 100);

 This is in Maple 12, I haven't checked to see if it exists in newer versions of Maple. 

 i want to create matrix that it`s element are matrix.
for example my matrix is 3*3 and elements are 2*2
in addition my element-matrix elements are unknown(x11,x12,........)