Hi everyone,
I am a new member of your group. I have a problem about matrix conversion from Matlab to Maple. In Matlab 7.0 i have created a program,this program sends a result matrix namely AT.This matrix is not symbolic, it is totally numeric. I would like to see this matrix inside of Maple 10. So far i could not make it.
I would be grateful if you could help me.
Greetings.

Hello everyone
I have a question about the use of ExportMatrix and ExportVector. I am currently working on a sheet, where a matrix is changed within a loop. At the end of each cycle of the loop, the eigenvalues of the matrix are calculated and given out in form of a vector.
How can I export these eigenvalue-vectors to a textfile together with the index of the loop?
I already tried to use ExportVector at the end of each cycle, but the command overwrites entries of previous cycles, so that only the very last eigenvalue-vector is noted.
Thank you very much for any help.

Hi,
I want to know if there is a function or simple way that retrieves the constant of an equation?
e.g eq=2x^2+4y-6 the constant here is -6

ex how do i command
# 1 3x+2y+z=2
# 2 4x+2y+2z=8
# 3 x-y+z=4
i can do the math.
(3*#3)+ #1=-5y+2z=10
(4*#3) +#2=6y-2z=-8
add both together y=2
sub in one equation above 6y-2z=-8 z=10
sub into x-y+z=4 x=-4
set this up in maple for me

Simplest example I can think of.
I want to define f(x) to be the absolute value function
(yes, of course, without using the built-in Maple absolute value
function)
f:=x->x;
is great for defining a function. I've used that many times to
define n-vector-valued functions of m variables.
But how do I do
f:=x->x if x>0
f:=x->-x if x

Hi,
I have a modeling equation and a set of data points, and I want to compute the accuracy of my equation relative to the data points. Is there anyway to compute the R squared value of my equation relative to these data points? All of the commands I can find in Statistics are used to *fit* an equation to the data points, which I don't want to do, I just want to have a qualitative measurement of how accurate my equation is.

How is it possible that the following program works correctly:
printlevel:=2:
for n from 1 to 10 do
if (0=0 mod 5) then 0;
end if;
end do;
It correctly outputs ten 0's.
But, when I change 0 to n inside the if conditional
printlevel:=2:
for n from 1 to 10 do
if (n=0 mod 5) then 0;
end if;
end do;
I get nothing for output. I should get two 0's.
n is 0 mod 5 exactly twice as n runs from 1 through 10.
I have experimented with adding spaces and deleting spaces
between keywords and parentheses and numerical values
to test if that was the problem. Nothing works.

Dear Sir/Madam,
I have written a small program to calculation a kind of integration. This integral depends on the values of another function which is given numerically. I want to calculate numerical results of this integral. But the I just have sucu result as "Float (Undefined)" . Please help me to find where is wrong. Thank you very much!

Download 7745_Float undefined.mwsView file details
In this Maple 10 classic worksheet I'm trying to get the eigenvalues of the matrix H, which are dependent of the parameter

F>=0.
Please help me to get rid of those RootOf's. The result may be numeric because I only need it for plotting.

Download 5085_20_H.mwsView file details
Hi Guys i have 2 matrices, A and B, a[i,j] and b[i,j] are the elements of the matrices respectively. How can i set the entries of A to equal the entrices of B, so then when i use the command, evalm(A), the previous a[i,j] values will become b[i,j]? Thanks.

for n from 1 to 2
do
if(isprime(L[n]) then 7
else 9;
end if;
end do;
No matter combination of semicolons or colons I put
at the end of each line or omit,
I cannot get this little test routine not to spit
back "unable to match delimiters" error message.
L := [4, 5];
P1 := [-8, 9];
if (5 > 6) then P1[1]
else L[2];
end if;
Ironically, this routine worked. I do not see the difference.

The equation y'= ((2-t)(2-y))/y , y(0)=1
How do I use Euler's method to calculate an approximation to y(1) using step size
i. h=0.2 ii. h=0.1 iii. 0.05

I am new to Maple (I have Maple 11 student version)
I tried to simplify atan(tan(x)) and nothing happens
Also atan(sin(x)/cos(x)) does not simplify.
What is the trick to simplification?

Dear all:
Inside maple, I want to call C program which is compiled using cygwin & gcc. I did a very easy one for testing.
int _stdcall add( int num1, int num2 )
{
return num1+num2;
}
and then gcc -o add.c && gcc -shared -o add.dll add.o
However, this doesn't work. Maple continue to load the DLL forever......
Does anyone know the reason?
I did it with Visual C++ with VC specific options and it works just fine.
Thanks,
Peter

the equation y'=1-y(t)^2
how do you construct the de plot and find the equilibrium solutions