In matlab, a function is returned a structure H, say H.a, H.b, ...

In maple, I want to call this matlab function, but what returned to maple is a Record:

Hs:= getvar("H");

Hs:= Record(a=..., b=..., ...);

So how can I convert this record to a normal maple array? so I can access to each element by Hs[1]. 

Thank you

Kyle

I am traying to perform the followig operation:

For a giving vector A, where A=[1,3,5]  (defined as A=([1,3,5],datatype = float), calculate a vector B where:

B=[10^1,10^3,10^5].

I tried to use a for cicle to calculate B:

for i from 1 by 1 to 3 do  B[i] := 10^A[i] end do

The problem is that i dont get a Vectr B but 3 different number with the name B[1],B[2],B[3]. Just B is not defined.

Hi,

I am trying to fit data to a function. I used the funtion Fit() but the results werent right. This is what i did:

T := Vector([600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400], datatype = float)

Kpco2F := Vector([1.22179966016487*10^20, 8.12830516164100*10^13, 1.66341265037017*10^10, 5.80764417521312*10^7, 1.03276140576140*10^6, 50815.9442560561, 4931.73803954936, 765.596606911256, 168.267406107047, 47.7529273657691], datatype = float)

I have run into some queer behaviour of my Maple 9 software. I gave the following commands:

##############################################################
 with(numtheory):
 xx := invcfrac([[0],[5,1,5,1,4,1]]);
                                        ...

Hi every one,

I am facing a situation here. Whenever, I sub n = 0 or 1, the following ode has a solution. 

But when I adopt other values except the above ones then the maple gives me the error

"division by zero". 

eq11:=(diff(((abs(diff(f(eta),eta,eta)))^(n-1)*diff(f(eta),eta,eta)),eta)

+n/(n+1)*f(eta)*diff(f(eta),eta,eta))=0;

resx:=dsolve({eq11,f(0)=1,D(f)(0)=0,D(f)(12)=0},numeric,method = bvp[midrich],

> f := a+D(x); 

> convert(f(t), diff);

Is there a way to tell Maple that "a" is a constant, so (t) won't attach to a? thanks, kyle

Hi there, I'm trying to pass some calculation to Matlab then retrive the result by getvar(), but seems something is getting wrong.

my matlab function is very simple:

function out =maple_fun(a, b)

out = a + b;

return

this function is saved as maple_fun.m.

in Maple,

restart:
with(Matlab):
openlink():
DirectoryLocation := " cd  '/Users/Kyle/Documents/MATLAB/'  ":

sol := dsolve(t*diff(phi(x),x$2)-x*diff(phi(x),x)+n*phi(x),phi(x));
phi := unapply(rhs(sol), x);
BC := [phi(0)=0,phi(1)=0];
with(linalg):
Ccoef := genmatrix(BC, [_C1,_C2]);
CharEqn := det(Ccoef) = 0;

restart;
sol := dsolve(t*diff(phi(x,t,n),x$2)-x*diff(phi(x,t,n),x)+n*phi(x,t,n),phi(x,t,n));
phi := unapply(rhs(sol), x);
BC := [phi(0,0,0)=0,phi(1,1,1)=0];
with(linalg):
Ccoef := genmatrix(BC, [_C1,_C2]);
CharEqn := det(Ccoef) = 0;

I have been using random numbers in other applications than Maple. Usually there is a function, which will give a pseudo random real number between 0 and 1. When I looked for it in Maple I got quite confused, because there are a lot of different options here - obviously because Maple can deliver random numbers/objects in many ways, even following a certain distrubution. I found out it doesn't work by just using rand(), since it is always starting with the same value. Then I found the command randomize(...

how can i specify (range and domain) of a function in the softwere,please answere if you are able to.

Division by zero, overflow error

A recent question brought to me some old applications in the application center, loading those applications in newer Maple versions shows critical information missing.

This prompted me to install MapleV on my computer to properly view these applications however after installing, sadly we get a division by zero, overflow error message. 

Since probably no has done this in this day and age, this is a real stab in the...

How to find the residue of   {e^(az)}/z(z+b)^m   at the pole -b of order m

Hi,

I'm currently working on chemical process thermal exchange and particularly on the solving of the heat equation using a time dependant boundary condition.

Briefly, the process consists in two layers of different materials (M1 and M2, thickness L1 and L2). The bottom part of the material M1 (z=0) is cooled down from Ti to Tf with the function T(0,t)=Ti-R*t (R is the cooling rate in °C.min-1) until T(0,t)=Tf. Here the equilibrium is reached in t=(Tf-Ti...

Useing the following procedure I'd like to collect a set of  roots in a list of lists, so they can be manipulated and presented in various plot options. Some of which could be very interesting (to me only perhaps).

One option is to create a loop which produces values of newton roots x0 for a given function. For example:              f:=x->(x^7)-5

for x from -1 to 1 by 0.05 do

Dear Maple Users

I am pretty new to programming in Maple, so maybe this is not a very difficult question to answer. I want to write some code, which generates a table to be displayed. In every cell I want some content, which is generated by some code as well. How can it be done, and if there are several ways, which one is the best?

Regards

Erik