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I have managed to download data for Nasdaq, NYSE and Amex in Maple. However,
my problem is how do I store the data in a txt file on my desktop in the most optimal way.
I want an mpl file so I can schedul the task manager to run the file each day in the background.
This is as far as I have come:


CSV := proc (Url) local theDLL, URLDownloadToFile, myDirectory, myFile, Destination, DL;


Hello, I am trying to solve the following BVP,

Eq1 := -mu0*M*(diff(theta(eta), eta))*exp(-M*theta(eta))*abs(diff(f(eta), eta))^m*(diff(f(eta), eta))

+mu0*exp(-M*theta(eta))*(m+1)*abs(diff(f(eta), eta))^m*(diff(f(eta), eta, eta))+theta(eta) = 0;

Eq2 := G*(diff(theta(eta), eta, eta))+mu0*exp(-M*theta(eta))*abs(diff(f(eta), eta))^(m+2) = 0;

bc := f(-1) = 0, f(1) = 0, theta(-1) =0.5, theta(1) = -0.5;

m:=-0.3 (or 0.3) :M:=1:mu0:=0.5:G:=3:

How to update this code to the Statistic Package for the graph below?for n from 1 to 15 do num:=convert(evalf(n), string): tracker[n]:=textplot([18,0.3,`Lambda is `.num],color=blue): H[n]:=ProbHist(PoissonPDF(n,x),0..25,26): N[n]:=plot(NormalPDF(n,n,x),x = 0..25):  P[n]:=display({H[n],N[n],tracker[n]}): od: display([seq(P[n], n=1..15)], insequence=true,title="Normal Approx. to the Poisson. Lambda is increasing from 1 to 15");

I am trying to solve a problem using fsolve. Where the fsolve is inside the integral. I keep getting the following message. Here is what I am trying to do 



where Q is a normal distribution and R is also normally distributed with its parameter conditional on Q. Following is the error message that I get.

"Error, (in fsolve) z is in the equation, and is not solved for"


I am having some problem with this procedure located in the "experiment" sub section.
I am trying to calculate the win probability in a poker game pre flop ie each player
get two cards. I am trying to find out which two card combination will result in the
highest probability of winning in the end.

In the first example I simply assume that player 1 gets [DA, HA] ie dimond ace

We start by simulating a random walk:


We're trying to solve an equation in Maple, but for some reason Maple comes up with an answer involving RootOf and _Z. We've searched the internet for solutions but nothing seems to work. So I'd hope somebody here is able to help us.

Thanks in advance! 


The equation:

how can i preform this calculation in maple?

(∂)/(∂ log(R[e[0]]))(log(N[u]))

it's a derivative of a logarithmic expression with respect to another logarithmic expression, the one on the bottom is a "standalone" vairable and the one on the top is a function of the previous one and some others.

thaks in advance to anybody who might help.

Hello every one, 

Here I will recall the PDE and its numerical solutiion provided by Maple help. 

PDE := diff(u(x,t),t)=-diff(u(x,t),x);

IBC := {u(x,0)=sin(2*Pi*x),u(0,t)=-sin(2*Pi*t)};

pds := pdsolve(PDE,IBC,numeric,time=t,range=0..1);


I want to export data...

Hi, I have a maple project and one of the questions reads: 

a. | Initially, a 100 – liter tank contains a salt solution with concentration 0.5 kg/liter. A fresher solution with concentration 0.1 kg/liter flows into the tank at the rate of 4 liter/min. The contents of the tank are kept well stirred, and the mixture flows out at the same rate it flows in.
i. Find the amount of salt in the tank as a function of time.

ii. Determine the concentration of salt in the tank at any time.

I'm new to maple so I'm facing a few problems in geometry. Actually I know the solution of the following questions but not by maple. Please help me in solving these..

1) Obtain the equation of a sphere which passes through the points (1,0,0), (0,1,0) and (0,0,1) and has its centre on the plane x+y+z=6

2) Find the equation of the sphere circumscribing the tetrahedron whose faces are:

          y/b + z/c =0...

Dear Experts,



I have an equation which needs to be simplified. However it is mostly in Bessel I and BesselK. To simply it I have used the simplify( expression,


I'm trying to compute the mean and variance of a custom discrete random variable, as indicated in the file below (well, I do know its mean and variance, but I need the variable in a more complex context). Defining it is no problem at all, but when I parse Mean(Y) and Variance(Y), a weird expression shows up, despite my random variable being really simple. Does somebody know what goes wrong?


3d phaseportrait...

April 30 2013 kst11 5


I'm trying to make a phase plane plot for the Lorenz system of differential equations around the equilibrium point (0,0,0) but when it keeps coming up with an error, saying it's "unable to obtain field plot, additional unknown(s) found: xy"

Any idea where I'm going wrong? Any help would be greatly appreciated!


sys1 := [diff(y(x), x) = a/(1-y(x))^b+c*exp(-d*x)/(1-y(x))^2]:


but the result is empty.

What can I do?

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