## Transfer code from Matlab to Maple...

I am a newbie to Maple, i have learnt Maple for several days.In Matlab i can easily declare a row vector t=0:0.02:0.5 (from 0 by 0.02 to 0.5) but in Maple i can't. I tried using "for" loop but i could not insert into a vector. How can I write a vector like that ? Please show me.Thanks a lot.

## error: general case of floats not handled...

>e1r := -1.5; > e1i := 12.455; > e2r := -.022269812; > e2i := .25368881; > E1 := e1r -I*e1i; E1 := -1.5 - 12.455 I > E2 := e2r -I*e2i; E2 := -0.022269812 - 0.25368881 I > nz1 := RootOf(E1*NZ^4 - NZ^2*(2*E1^2) + E1^3 - E1*E2^2=0,NZ,index=1); Error, (in content/polynom) general case of floats not handled ok so what is wrong with this? its all simple equations and complex floats, the syntax for rootof looks correct...

## Cannot get results with dsolve....

I wanted to solve a differential equation and followed the examples in Maple manual exactly: ode := {(2*t*x*q+x-4*t*x^2*(2*y(v)-1))*(diff(y(v), v))-1 = 0}; ic := {y(0) = 1/2}; soln := dsolve(`union`(ode, ic), {y(v)}); But I got neither results nor error informations. Does it mean, "ode" has no solution? In such case, how can I get some tips from Maple? thanks a lot.

## First Order Logic...

I have a problem with a sentence that I have. I don't know whether it is a formatting problem or problem with the statement itself. I'm trying to say something like this (if it makes it less abstract, I'm trying to formally define a Sudoku puzzle). For any set S and function F that maps the ordinal set |S|^2 to |S|, there exists a set T which is a subset of S^|S||S||S| such that any element of T Tabc is equal to the empty set iff c !=F(a,b) First of all, theres a couple issues with this. |S| is the cardinal of S, but for convenience I also use it as an ordinal set. Second, as I started typing this I saw that I do not have the necessary statement for all Tabc which are members of T. How can I correctly input this statement into Maple?

## Text editor for Maple Programming...

I was wondering if anyone can recommend a good (free) text editor for writing Maple source code. I am writing some programs and thus far I have just been using Notepad, but automatic syntax highlighting and indentation would be nice to have. Thanks!

## limits of a subsequences...

I am trying to use maple to find the limit of a subsequence, but what I've tried hasn't worked

For example define . Then using maple = ## solving first order IMPLICIT ODEs...

Hi,
Can someone tell me how to solve an IMPLICIT first order ODE? That is, an eqn. of the form F(x,y,y')= 0 where we cannot seperate the term y'. An example will be helpful.
Thanks.
D.O.

## order of solutions to degree 4 polynomial...

I have the following code snippet which uses solve to get the 4 solutions to a quartic equation. In my application I must know which solution is which, for they each have a specific placement in later calculations. I know that most of Maple's datasets use memory address as their method of sorting, and therefore each run can give a different order to the results. Is this also true for solve? I need to know a way which the order of the solutions will always be constant. (sorting by returned value will not suffice) WaveEQDet := proc(layer,eV) local E1, E2; > E1:=Epp1(layerelementtable[layer], eV);

## Plotting function of more than one variable....

The plot function will not work with the following code:

> vatt:= (r,b,rc) -> -epsilon*(cos(Pi*(r-rc)/(2*wc)))^2;

> VattR := proc(r,b)
> rc:= evalf(b*2^(1/6));if r < rc then RETURN(-epsilon) elif rc <= r and r <= (rc+wc) then RETURN(vatt(r,b,rc)) else RETURN(0) end if;
> end proc;

> plot(VattR(r,1),r=1.1..1.2);
Error, (in VattR) cannot determine if this expression is true or false: r < 1.122462048
> VattR(1.1,1);
-1.0

The functions work fine on their own....

## 1D input...

I would like to set my sessions to show the 1D Maple sheets - however when trying the options in the menu - it still wont happen. What am I doing wrong? Help - the 2D version drives me nuts!

## Mr...

Please recommend a good introductory book for Maple. My math skills are very high & I have much programming experience, so a Maple for Dummies approach would be too simplistic.

## Help with SurfaceInt in VectorCalculus Package...

I have been messing with the various functions in the VectorCalculus package and have been getting some unexpected behavior w.r.t. some of the functions. My current issue is with the SurfaceInt function. Consider a sphere whose surface density increases linearly from one point on the sphere to the opposite pole. What is its overall mass. I set up the package... > restart; > with(VectorCalculus); > SetCoordinates(spherical[r, phi, theta]); and a density function... rho := proc (r, phi, theta) options operator, arrow; phi end proc; and perform the integration...