Hi all,

I have Maple 13, and I am learning how to use it.

To start with it, I was trying to resolve the values of X and Y in the following equations:

(1): X + Y = 60

(2) X = Y -12

and here were what I input into Maple

Good morning!

I am currently involved (though hopefully near the end) in a lengthy discusion regarding how to use the mapleprimes editor. I should say up front that I am grateful for any forum that provides me a place to ask questions and to help others. I've been around for a few years, but only lately have I decided to put substantial effort into learning Maple. And it is a substantial effort, despite the Maple ads about how easy Maple is to use.

matlab has the following command:

axis ([-inf inf -inf inf])

where the inf means (something like) "the largest value" and -inf "the smallest value". With this command, you can set the dimension of the axes without having to enter the actual values, which is then robust to changes in parameter values. This is most useful in situations where some of the values are to be fixed and others left to the simulation, say:

axis ([0 inf -inf 1])

What would be the Maple equivalent or workaround?

many thanks.

Hi acer,

I got the problem of "Int vs int" again. With your advice, I changed from "int" to "Int" in the f2 expression below and draw the graph

However, the "memory allocation failed" message appeared again after long time running. Did I understand something wrong?

Here is the expression I want to draw the 2D graph

f1:= d*exp(-(0.5*(u-s-k))^2-(0.5*(u-s-k)+t-u)^2+(0.5*(u-s-k))^2+(-d*k));

Hello,

I've seen a topic or two similar to what I'm trying to do, but not exactly the same.  Their solutions didn't work for my issue.

Long story short, I need a function plotted on a loglog scale with certain points on this curve to be actual points, just like a scatter plot on top of a function.  Let's assume I've got a function f(x) and I have a list of some values for x.  I'd like a loglog plot of f(x) as well as points for each of my 'x' values to be actual points that lie on f(x).

Hi all, I have this same equation in another active thread also with boundary conditions. But now I have INITIAL CONDITIONS INSTEAD. I thought of just starting a fresh post. Here is my non-linear differential equation x := diff(y(r), r, r)+2*(diff(y(r), r))/r+ C*polylog(3/2, -exp(C2*(C3-y(r)))) = 0 with boundary values D(y)(0)=0 and y(0)=0. C, C1 and C2 are some numbers. The hint says to use procedure to solve polylog and then integrate the differential equation. I was wondering if I can get some advice on solving this equation.

Isn't there a way to get Maple to document each step in its execution of a command?  E,g,, I have a complicated expression that I want to SIMPLIFY & I would like to see how Maple does it.

Alla

I want to evaluate an integral over a numerically calculated function. Specifically:

Hello everybody,

Im trying to plot a f (x) function but maple keeps giving me an empty plot error.

From my maple worksheet:

Error:

I recently realized that maple/standard has some plotting capabilities not available in maple/classic. I nevertheless plan to stick with classic except for the occasional printing of graphs. I don't want to write multiple worksheets, so I want my worksheet to know when I'm printing in standard and when I'm printing in classic. I don't want a maple/classic plot to overwrite a maple/standard plot (and vice versa). I want to set some classic-specific and standard-specific options.

I have an equation of a line that intersects the ellipse.  I can get Maple to find one intersection.  How do I get the other?

E1:=x^2/300+y^2/1000=1;

E2:=y=2*x+40;

solve({E1,E2},{x,y});

evalf(%);

gives me {x=-4.810723698, y=30.37855260}

or I could use fsolve({E1,E2},{x,y}); and get the numeric result right away. 

There is a second intersection point I can find graphically around x=-5 y=30 but I don't know how to get maple to find it numerically.

 

Dear Sir
Can you please help me to minimize the following cost function with maple 10.I want that " t and T must be greater than zero(not equal to zero) , t < T  and C > 0." I tried a lot but I am not getting the values of t and T as mentioned above " ". Also why  the solution obtained by the 2 methods below is different  ? Which one of them is correct ?

Priyaasha

Hi all, I have a non-linear differential equation x := diff(y(r), r, r)+2*(diff(y(r), r))/r+ C*polylog(3/2, -exp(C2*(C3-y(r)))) = 0 with boundary values D(y)(0)=0 and y(infinity)=0. The hint says to use a subroutine to solve polylog and then integrate the differential equation with help of a Runge-Kutta like scheme. I was wondering if anyone could help me with this. I have no clue how to use subroutines and specially when y(r) is within polylog. Thanks in advance, MS

Is this the best way to produce a random 2-d array? 

L:= Array(1..10,1..10,(rand(1..50));

What's unusual about the operation is that I seem to get an unusually high number of doubles in the rows.  All of the time I'm getting 50% of the rows with a matching pair of numbers (ie. every time I run the line, I get 5 rows with a matching pair of numbers) 

Does the probability of that seem a little high?  Also are there other ways to produce a 2-d random array? 

Thanks.

Hey, I have this complex ecuation on maple: (x+Iy)^3-x-Iy-A=0,

And I have to do an animation for -2<=A<=2, I tried using implicit plot and giving A that range, but it only returns a blank plot, any help would be appreciated!

Oh! I also have to search for what A values the ecuation has 1, 2, and 3 real solutions, any help in this would be appreciated to!

Thanks,

SolracQ