## 524 Reputation

15 years, 115 days

Ok, thanks

Ok, thanks

## Also...

Have you installed maple before matlab ?

When installing maple 15, it detect your matlab installation and ask you if you want to use maple toolbox

The simple way is to install matlab before maple

## Also...

Have you installed maple before matlab ?

When installing maple 15, it detect your matlab installation and ask you if you want to use maple toolbox

The simple way is to install matlab before maple

## Yes...

Your procedure work well. With maple you can write a procedure with a more simple way using directly the formula like:

it := proc (a, b, f, n) local val; val := evalf((1/2)*(b-a)*(Sum(f(a+i*(b-a)/n)+f(a+(i+1)*(b-a)/n), i = 0 .. n-1))/n) end proc;

## Yes...

Your procedure work well. With maple you can write a procedure with a more simple way using directly the formula like:

it := proc (a, b, f, n) local val; val := evalf((1/2)*(b-a)*(Sum(f(a+i*(b-a)/n)+f(a+(i+1)*(b-a)/n), i = 0 .. n-1))/n) end proc;

## @suddenman  First: Replace this l...

First:

Replace this line : bc := (D[1](u(x, t)))(0) = 0, (D[1](u(x, t)))(l) = 0, u(x, 0) = cos(2*Pi*x/l)

with bc:=D[1](u)(0,t)=0,D[1](u)(l,t)=0,u(x,0)=cos(2*Pi*x/l);

But there is problem in your boundary conditions which should be revised

## @suddenman  First: Replace this l...

First:

Replace this line : bc := (D[1](u(x, t)))(0) = 0, (D[1](u(x, t)))(l) = 0, u(x, 0) = cos(2*Pi*x/l)

with bc:=D[1](u)(0,t)=0,D[1](u)(l,t)=0,u(x,0)=cos(2*Pi*x/l);

But there is problem in your boundary conditions which should be revised

## Example worksheet...

Can you give example worksheet where you have error ?

## Example worksheet...

Can you give example worksheet where you have error ?

## reverse it also...

To get a constant positif current, you should also reverse it

## reverse it also...

To get a constant positif current, you should also reverse it

## arctan...

You have two solutions with the function arctan which has two arguments seprated with comma.

## arctan...

You have two solutions with the function arctan which has two arguments seprated with comma.

## Thanks, but it work only for text...

Thanks, but it work only for text and not for variables and command (mod math) in expressions or equations

In Classic worksheet ok it work

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