Dear all,

I use the following statment (without numerical values)

if        IT<20     then        IT:=IT+1            

 if    ZUM<(0.1)^(8);    IT=20;         else;    

for i from 1 to 10   do                               YU[i]:=U[i];                  od;    

for i from 2 to 9 do                           DU1:=YU[i+1]- YU[i-1];        od:      

end if;    

ZUM:=U[1]-YU[1];  

end if;  

the following error occur

where is the problem.

Dears I have the following statment in Matlab

r=8;             ZUM=U(1)-YU(1);            IT=0;

for r=2:10

    ZU(r)=abs(U(r)-YU(r));

    if ZU(r)> ZUM

        ZUM=ZU(r);

    else

        ZUM=ZUM;

    end

end

ZUM;

while IT < 20

    IT=IT+1

    if ZUM < (0.1)^r

    IT=20;

    else

  for r=1:Nx

  YU(r)=U(r);

  end

YU;

I need to write this statment in Maple

Hellow.
Is Maple understand the symbol f(i,j), f[i,j], f:=-->(i.j) and f_{i,j}  in the same way or in different way.

Hello,

I am working with numerical function with two indices, such as f[i,j], where i,j run over 1 to N, where N is n integer number.

The resluts stored in vector colummn for each value of j. i.e.

for each j=1,     G1:=Vector[column](N,i-->f(i,1))

for each j=2,     G2:=Vector[column](N,i-->f(i,2))

and so on.

The procedure is working for the first value j=1.

for the second value the following message appear

{--> enter Terminate, args = 
{--> enter Terminate, args = 
<-- exit Terminate (now in Terminate) = }
<-- exit Terminate (now at top level) = }
 

Hello, I have a function defined as

                                                   g :=  (x, y)->diff(u1(x, y), x, x)+diff(u2(x, y), x, y). 

I want to define another function as follows

                                                           f :=  (y) ->subs(x = 0, g(x, y)) ,

Now, when I want to calculate numerical values for the new function f(0), f(0.1), f(0.2),..... and so on. The following massage appear

Error, (in f) invalid input: diff received 0, which is not valid for its 2nd argument.

What is the problem here.

Amr