I have been watching a demonstration on youtube about LP and Interior Point Methods:

http://www.youtube.com/watch?v=MsgpSl5JRbI

He is solving a LP by using a barrier function and has a very nice simulation
in the end where the solution converges to he optimal point and mu goes to zero.
I tried to replicate it in Maple but I am strugeling.
I have attached an worksheet what I have done so far:

Hi,

I'm using solve and I want all the solutions within a certain value, but then within my procedure i'm looking to get a list of just the solutions by using the AllSolutions=true command I get:

a:=evalf(solve([sin(x) = 0.5, 0 < x, x < 10], x, AllSolutions=true,Explicit=true));
 {x = 0.5235987758}, {x = 6.806784084}, {x = 2.617993879}, {x = 8.901179187}

I then need to put them into a list [0.5235987758, 6.806784084,...]

so i either...

Hi Guys!

I need your help!

I made a maplet which contains an image in a label. Well, I would like to change this image when i click a button.
But it doesn't work. :S and already i have no ide! Please help me!! 

I have a question: how can I interpolate a 3-d data (x,y-variables vectors; z-function vector)  ang get a new interpolated function explicit polynom?

Thanks in advance! 

Hi. I need to plot a discrete set of points. I have the function, but the assignment is to print the points. I cannot figure out how to plot them correctly (yes, I've been reading the help). The points are created as values from functions and stored in arrays(?) (or, what I think Maple calls arrays), like this:

a := proc (t) options operator, arrow; (-1)*.12*t^4+12*t^3-380*t^2+4100*t+220 end proc
v := proc (t) options operator, arrow; (-1)*.48*t^3+36*t^2-760*t+4100 end proc

Hi guys

I've got a Jacobian matrix defined in my maple code to be:

m1

The matrix consists of expressions involving the variables R,X,Y,Z,t where R:=(X²+Y²+Z²)^0.5

I wish to evaluate the matrix for X=1, Y=1, Z=1, t=1ONLY. but I want to leave R alone. I've tried using the code:

eval(m1,{X=1,Y=1,Z=1,t=1}):

but Maple evaluates it for all the vaiables including R.

Is...

How many times does the the sign of the product cos(x)*cos(x/2)*cos(x/3)*...*cos(x/2011) change when x passes from 0 to 2011*Pi/2?

Why is the max height always 0 in this code? Thanks.

>restart;

>a := proc (t) options operator, arrow; (-1)*.12*t^4+12*t^3-380*t^2+4100*t+220 end proc

printf("%10.10s    %15.15s\n", "Time (hrs)", "Height (meters)");

printf("%10.10s    %15.15s\n", "----------", "---------------");

amax := 0; tmax := 0;

for t to 4 do

alt := a(t);

printf("%6d        %10.0f\n", t, alt...

Hi!

> define( f , diff( f(x,y) , x ) = f1x(x,y) , diff( f(x,y) , y ) = f1y(x,y) );

produces

> diff( f(x,y) , x );
0

> diff( f(x,y) , y );
0

> diff( f(x,x) , x );
f1y(x,x)

So how can I do it correctly?

There are two data txt files:x0-y0.txt and x1-y1.txt,every one has two columns.
So, two functions can be made from the data,named y0=y0(x0) and y1=y1(x1).
I just want (y0-y1)/y0 at the same x coordinate.
Because it's too difficult to get it directly,I choose the curve fit method.
First,I used the command CurveFitting[ThieleInterpolation] to get two functions.
And then pointplot the (y0-y1)/y0 at the same x0 coordinate.
Surprisingly,the plot is discontinued.

Why is it when I read an image a:=ImageTools:-ToGrayscale(ImageTools:-Read("f:/example.bmp")) saved as a bmp saved from the internet and try b:=Threshold(a,0.5,method=above) gives me this error.

Error, (in ImageTools:-Threshold) unable to store 0.107651138030195570e-293+0.522826466871872160e-288*I in a datatype=float[8] rtable

However when I open the bmp in paint and resave the image in either 24 bit 256 color, doesn't really matter, but a format of bmp...

Hello Friends,

I have the equation

Hello-

I am trying to find an analytic solution to a cubic equation of the form ax^3 + cx + d, where a, c, and d are rather complicated coefficients.  If I simply use the solve command, it gives the solutions assuming that the discriminant is negative (that is, one real and two imaginary solutions).  However, I want the solutions in the case that the discriminant is positive (the solutions have a different functional form; it's not the case that the imaginary solutions simply become real...

Hello

I'm working on a project, where I need to create some user friendly proc/modules. I need it to ask for the variables e.i.

'Enter equation'

'Define range'

etc. but I have no idea how to do so. Can you describe a method of doing so?

Is there a way to obtain the code for BrownianMotion function in Maple15?

I tried

interface(verboseproc = 2);
readlib(Finance:-BrownianMotion);
print(Finance:-BrownianMotion);

but these only give

module () local ModuleApply, BrownianMotion, BrownianMotion1D; end module

Where do I go from here? Thanks.