I have a function with 3 variables fr2, fr3, and fr4. I want to find how this function varies with these variables in such a way that fr2+fr3+fr4 = 0.5.  All three variables are non-negatives. Please help me in generating a sensitivity report as fr2, fr3, and fr4 each varies across 0 to 0.5 in increments of 0.01 subject to their sum is equal to 0.5

Thank you.

The function is fn1 = 1.150000000*10^11*fr3 + 1.150000000*10^11*fr4 - 1.374950000*10^10 - 1.549500000*10^10*fr2

sensitivity_help.mw

When I made a restraint system like bolow and used  GetEquations() , undefined external forces(Fx,Fy) was derived. 

I want to know the reason or the principle of GetEquations() which is solving the dynamics of  a restraint system.

msim→2hand.msim
mw→2hand.mw

How to know the internal procedures of Maple for instance : taylor or laurent ? Thank you.

Dear I have 

Vectors of locations points 

X=[ 1 , 2] ; 

Y =[ 6 , 7 ] 

I would like to point of the point of this grid a vertical bars with different given length...how can I do this using maple or matlab 

how to export my data in sheet excel for this file 

Nnew.mw  

I am trying to evalute symbolically a matrix looking like this:

V := (Matrix(3, 3, [[0, 0, 0], [0, 0, 0], [0, 0, 0]]) - (((1/2) . (Vector[row](3, [0, 0, 0]))) . (Matrix(3, 3, [[0, 0, 0], [0, 0, 0], [0, 0, 0]])))) . (Vector[column](3, [0, 0, 0]))

Here is the picture because the formatting is bad:

I need to have some equations in this form but maple wont allow me.

Let us say there is a function desribing an angle. And by deriving the math let us say the position is cos(theta). Theta is a function of time and cos is a function. How do i differentiate this and make maple see that theta is a function and not a variable.

i have tried this (x(t) is theta):

f := t -> sin(x(t));
Diff(f, t);

Did not work.What i want is the output to be.

cos(x(t))*x'(t)

Maple returns to me an algebraic expression that involves many RootOf expressions and I have found it hard to get all solutions behind this expression (by using "allvalues") - this keeps on running without terminating. Is there a way to get the number of solutions without asking Maple to return all solutions explicitaly?

Hello,

Problem description

1) Define a function in terms of variables and parameters,

2) FInd the optimal solution

3) Plot the optimal solution in terms of a single parameter

Solution

What I have done is very basic since I haven't use Maple for many years. Here is an example

1) f(x;a,b,c):= ax^2+bx+c; (I don't knpw how to tell Maple that {a,b,c} is a set of parameters)

2) solve(f(x)=0,x); (I could use something like solve(f(x)=0,x,'parametric','real') but I am not interested in so detailed solution)

3) Here is my main problem. I want to save the first solution of x in optx(a;b,c) and the second in opttx(a;b,c) but I don't know how to do it (again, here a is my variable and b,c my parameters)

4) I also don't know hot to plot optx(a) as a increases, whereas the values of {b,c}={e.g., 2,3}

I would appreciate any resources/guidance 

hello,my friends.I got a problem in using maple.

I want project a cuboid on a plane, and integrate function on that area.

for example, a cuboid which have a spatial diagonal between (0,0,0) and (1,2,1).
Then it was projected to a plane defined by three points (-1,0,0), (0,-1,0) and (0,0,-1).
Finally, a function x^2+y^2 was integrated on that projected area.

I found the cuboid can be defined with plottools:-cuboid and projected with plottools:-project in maple.
but how to integration next?
I can't find any commands in maple can do the integration with that irregular area.

I need some help.Thank you very much in advance.

Hi!

Do you know why the sequence of output is difference than the handing output?

restart;
a := 1.4;
b := 0.3;
x[0] := 1;
y[0] := 1;
<x[n + 1], y[n + 1]> = <b*y[n] - x[n]^2 + a, x[n]>;

f := (n, m) -> (-n^2 + b*m + a, n);
 

g := (k, n, m) -> (f@@k)(n, m);

seq([g(a, x[0], y[0])], a = 0 .. 3);
        [1, 1], [0.3, 1], [0.61, 1.3], [-0.2701, -1.99]

[g(0, x[0], y[0])], [g(1, x[0], y[0])], [g(2, x[0], y[0])], [g(3, x[0], y[0])];
        [1, 1], [0.7, 1], [1.21, 0.7], [0.1459, 1.21]

to_minimize.mwto_minimize.mw

I have a function fn2 that I want to minimize. I'm not sure about the range of A. So I first want to check out if the function is convex or concave. Also need to find the optimum value of T w.r.t A for the fn2. But I'm not able to understand the solution, please help.

Hello,

I am having some trouble with the "Seq" command of the "Threads" package. This is a parallel implementation of the usual "seq" command.

I namely defined a (very long) procedure "f" which defines a (very complicated) function $f: R^2 -> R$, taking as arguments an $x$ and a $y$ and returning $f(x,y)$. I want to plot its graph in 3D, which I try to do by making a 3D data structure consisting of points making up the $x$ range, $y$ range, and the evaluations $f(x,y)$. I then want to plot it with the "SurfacePlot" command from the "Statistics" package.

If I define my data structure as

 data := [seq([seq([i/10, j/10, f(i/10, j/10)], i = 1 .. 10)], j = 1 .. 10)]

the SurfacePlot(data) works. However, it is very slow because it runs in serial and the function evaluation "f(x,y)" takes a long time to compute.

I therefore wanted to compute the data in parallel. For this, I use

 data := [Seq([Seq([i/10, j/10, f(i/10, j/10)], i = 1 .. 10)], j = 1 .. 10)]

Sometimes this works, but often it does not and I get the following error after a number of datapoints have been computed (i.e. after evaluations of f have been made).

Error, (in simplify/float) invalid arguments for Float constructor

This is the first time I use parallel computing, so I am not familiar with potential problems that could trigger errors and don't understand very well how parallel computing works. Does "Seq" only compute the different data points [x,y,f(x,y)] in parallel, or does it compute stuff within the procedure "f" also in parallel when evaluating "f(x,y)" at some fixed arguments "(x,y)"? Because another procedure is defined within "f" and it is called multiple times within one "f" call, so in that case it could be a problem with lexical scope. Any suggestion to help me understand and correct my error would be greatly appreciated.

A few days ago my Windows 10 (32 bit) operating system did an update of my Excel 2016. Since that moment I get following message:

However the addin toolbar is still present and WMIMPLEX.xla file is also still present. Removing and reinstalling the addin did not help. So I am wondering what other solutions could be done.

Aside of this I would like to ask some help for the correct syntax in Thermodynamics package calculating water vapor pressure. For one or another reason I do not succeed to find the correct syntax to obtain the water vapor pressure at 24°C.

Thank you in advance for any help

Hi,

I want to add a  degree symbol (°) in my  plot Triangle 2 ( for example 100°  )

Ideas ?

Thanks

QuestionTypeset.mw