Good morning. I know what is the function that I report the rank of the controllability matrix for time-invariant systems.?

help me please

I have a very simply equations 

eqs := {2.32 = a+b, pa = .4310344828*a, pb = .4310344828*b, pa+pb = 1}

pa is the persnet of a in the whole a+b

maple auto simplify pa = a / 2.32 to that.

I call the solve(eqs) and get the NULL return. that mean there is no solution for this eqs

but that's not true

even I do this

solve(eqs union {a=1})

it also return NULL

My command:

odeplot(dsol1,[x(t), y(t), z(t)])

where dsol1 is the numeric RK45 solution of my system of differential equations, and x(t), y(t), z(t) are the solutions. This command works fine, but I am not able to animate it.  

hi guys,

i need to solve s system pf three PDES numerically and ended up with "in pdsolve/numeric/process_PDEs) all dependent variables in PDE must have dependencies esplicitly delclared". Can anyone gives me a hint to fix it (worksheet is attached).

Thanks

=

I have to make following substitutions in a ODE:

alpha = x - 2

y(alpha) =  y(x) - 1

[Maple code starts]

The ode is 

ODE := diff(y(x), x) = (y(x)+1)/(x+2)-exp((y(x)+1)/(x+2));

I have used the following commands:

Rhsa := eval(rhs(ODE), {x = alpha-2, y(x) = y(alpha)-1});
lhsa:=subs({x = alpha, y(x) = y(alpha)}, lhs(ODE));

Sub_ODE:=lhsa = Rhsa;

Hi:


I am trying to save plots to files in the batch mode (or when running maple from the terminal). The simple code below works fine from the gui interface, but when executed from the terminal, the fonts are not adjusted. I have tried exporting to other formats as well (eps, jpeg). Any ideas how to get around it?? It is problematic for me because I need to produce density plots with large data sets. Ideally I would like to export in the eps format, but these large...

Hi there,

1) I have imported my excel file using Tools>assistant>import data.

2) My excel file contains close to 35 columns.

3) Now, within Maple, I want to plot say Column B (Time) against Column C (Temperature) of the imported excel file. 

4) Also, in addition, once I can plot two columns against each other, How can I include other columns in the same plot.

Any nudge in the positive direction will be appreciated.

Thank you.

I use gnuplot to generate graphs in C++.Now we all know that in C++,we  just pass a text file to gnuplot,tell it to plot the text file.

Now,in Maple I want to do the similar thing,like this:

Suppose I have some single variable function/procedure,say of x

then I can write a loop say,

for 0 to 100 by 0.01 do

x,f(x)

od;

With this I can see the output.Now if I want the plot of f(x) vs x,then how can I say it to Maple?

I have a system of three differential equations with three unknowns, say f(t), g(t) and h(t).

My problem is that the system involves also f(invh(g(t))), g(invh(g(t))) and f(invg(h(t))), where invh is the inverse of h and invg is the inverse of g.

How can I instruct Maple to deal with these inverse functions?

I came across this problem while helping another user find the maxima of an expression for 
various values of a parameter here:

http://www.mapleprimes.com/questions/124104-Maximum-Points--Of-Function-With-More

For various values of ga, it was required to find the maxima in a range of 0<delta<2. 
Plots of the expression indicate that one such maxima exists for each value of the parameter.

My approach was to find the zeros of the first...

The Units package includes various units that are called ton/metric ton/tonne/short tons but not long tons (LT). A long ton is equal to 2240 pounds of weight and is part of the imperial system, so it is also know as the "imperial ton" or the "weight ton".

This unit (the long ton) is used extensively in naval architecture and ocean engineering. I would hope that you consider adding it into the next update of the Units package.

Or perhaps, it would...

I am using Windows 64 bit Maple 14.

I am trying to read a package (stochastic9) stored in a text file, stochastic9.txt in the directory: 

C:\Program Files\Maple 14

I can't read this or ANY file from ANY directory. Nor can I save ANY object to ANY directory. Here are some sample entries and error messages:

> currentdir();
                  "C:\Program Files\Maple 14"...

I really need a result to the integration below but Maple 13 just won't return one. Could you please help me or advise me as to what might be wrong or what I might try ? I'm integrating on the real line in x but even when I alter the limits of integration maple just returns the integrand.

s1:= int((1/8)*sqrt(2)*exp((1/2)*k^2*cos(x)^2/sigma^2)*exp(-(1/2)*k^2/sigma^2...