## How could I use Sockets package to get part of...

by: Maple
Hello, I would like to use Socket package to get informaction from HTML page on Website. COuld you help me please? I need to get the part of HTML file to use it in my procedure. Thank you very much Vladimir

## Evaluate an integral in terms of Bessel functions...

A colleague has asked me this: The integral int(exp(-x)/sqrt(x^2-1),x=1..infinity) is equal to BesselK(0,1). Is it possible to get Maple to make this evaluation? I (or he) would be grateful for any ideas.

## using builder maplet

by: Maple
how to make maplet which can run some window by using builder maplet..? how its steps.. regard Hari(ary_raper@yahoo.com)

## Descrete Math...

How do I use Maple to apply depth-first search to a graph to obtain a depth-first search of numbering of the verticies. Once again I need to input my graph in order to retrieve this information. How does Maple provide this info based off my graph?

## Descrete Math...

In exercise is Trees-- How do I use the breadth-first search algorithm to find a spanning tree for a connected graph. (Start with A, and use alphabetical order whrn there is a choice for a predecessor). So the bottom line is I have a graph and listed in the text and I want to import it in maple in order to figure out the above info. I have used the command prompt but none seem to have what I am looking for. I am a new user, I have tried to modify preset graphs, however I need to have the ability to determine data from my graphs. Please provide help. I am also trying to use the (ISTREE) function but it still does not provide me with the data I am looking for.

## Linear Algebra(Bessel) Integration and Inverse of ...

I got a set of instructions that i need to compute but i cannot put it all to work like one program or algorithm. i can only put it in bits. I have figured out how to put in Bessel function of a first kind, then how to derive it and few other things. But I am having trouble putting it all together. It isnt connecting for some reason. I assign name and then sub. I guess I don’t know how to do the algorithm. Maybe some other stuff is wrong. Im not sure. I hope someone here can help me perform these computations. I am at a beginner lever and hope you guys can help me out here. At the moment I have access to Maple7. Somebody from the department may help me get Maple11.

## Compiler:-Compile & arrays...

I want to use Compiler:-Compile for a function with a numerical vector v:= [1.0,2.0,3.0,4.0]; as initialized variable. The help refers to CodeGeneration/Details where it says: "The CodeGeneration functions can analyze some rtable type declarations and constructors within procedures. Data types, dimensions and ranges are recognized, but most options are ignored. The only initializer accepted is a list. Dimensions and ranges must have integer values ..." I did:
```foo:=proc(x::float)
local v::Vector(1..4,datatype=float[8], order= Fortran_order);
v:= [1.0,2.0,3.0,4.0];
return x*v[1];
```

## plot...

hi.. if i have the command like this(below), how can i plot histogram in a range (0..1)? data1 := (RandomTools:-Generate)(list(float(range = 0 .. 1, method = uniform), 100)) after that, how about the source code for random generator in maple10? can anyone help me? thanks...

## Split function with Two Arguments...

hi! Can Somebody tell me how to implement the equivalent of Mathematica's Split function with two arguments: Split[list] splits list into sublists consisting of runs of identical elements. Split[list, test] treats pairs of adjacent elements as identical whenever applying the function test to them yields True in Maple. Thanks, Raj

## Plotting multiple curves...

Hi! I'm trying to plot a graph of (u^2/sin^2(k))-(v^2/cos^2(k)) where the value of k varies. i've found the kind of command that plots multiple lines on the same graph: plot({seq((x-k)^2,k=0..5)},x=-10..10); but am not sure how to change it to produce a graph with multiple lines on for my function which has both u and v that vary. Thanks

## Animation of Archimedes Screw....

Hi I need to animate the Screw of Archimedes using maple, I tried animate3d and insequence=true and both don't work. This is the screw. plot3d([a*cos(x),a*sin(x),3*x],a=-15..15,x=1..8*Pi,axes=framed,scaling=constrained,color=gold,numpoints=4000,style=patch); This is the center cilinder. with(plots):plot2:=implicitplot3d([x^2+y^2=40,z],x=-15..15,y=-15..15,z=1..24*Pi,axes=framed,color=yellow,numpoints=5000); I should also make a function that "lays" on the screw, and a point should be visible going upwards, this should make the water that gets pumped up by the rotating move.

## pointplot series of curves...

Need help pointplotting series of curves. thanks, TL

I have a long file and i would like to only pick up some parts to run sometime. Does anybody know how to change multiple commander lines to miltiple comment lines? What i know is that # can change one commander line to comment line. Thanks a lot!

## How to... generate indices of a selected subset of...

Hi, all! Perhaps this is an obvious question for experienced users, but it's given me some trouble as a newbie... many thanks for anyone who can help me with this... I'm trying to find a way to return the indices of a selected subset of an array (or matrix, or whatever, I'm not picky.) Here's a simple example of what I'm talking about. Here's some actual Maple input/output that I ran:
```> foo := Array( 1..10 , i -> i ) * 2;

foo := [ 2 4 6 8 10 12 14 16 18 20 ]

> bar := select( x -> ( x mod 3 = 0 ) , foo );

bar := [ NULL NULL 6 NULL NULL 12 NULL NULL 18 NULL ]```