Unanswered Questions

This page lists MaplePrimes questions that have not yet received an answer

Has anyone used MapleSim to coordinate with Matlab/Simulink Model for the purpose of making their autocode the most effiecent?  I belive from  a webinar I watched something like this could can be an application of MapleSim.  I'm curious if anyone  has used it for that purpose?  If so, what were the challenges/benefits? Did you save in embedded memory needed (i.e. smaller autocoded files) or shorter proccesing time measured? 

Hi,


I'm using MAPLE 13 on Mac OS X 10.5.8 with a "French keyboard".

Suppose I set

a:=plot(x^2) or some other complicated expression, but just for simplicity sake

Then I go ahead fill up a worksheet then change the a to b in the same line and alter the expression for variable b (because I didn't want to type out a new line for the variable)

How do I recall what I've set a equal to? 

eval(a,1) - just returns the plot and    print(a,1) - returns PLOT(...),1

I think there's a way but I can't recall.  Can someone point me in the right direction?

A small glitch

with(plots):
pointplot3d({[2,3,4],[1,2,3],[4,5,6]},symbol=box,axes=boxed)

The third point is missing from the plot however if I use axes=normal all three points are displayed but when the boxed option is enabled the point [4,5,6] is not displayed. 

It seems the autoscaling undercuts the last point and so is out of view of the plot.  In order to have the 3rd point visible (it is there) we need to use the view=[ xmin..xmax,ymin..ymax,zmin..zmax ] option.

I've bought a new computer recently and was disappointed, because Maple uses only 25% of that processor (my old computer used 99% of CPU).

I have Intel Core i5 750 processor (it has 4 kernels).
From the Screenshot you can see that It uses only 25%, but not because it uses only one kernel (it uses all 4 kernels).

If I open two Maple instances and run the same program on all of them at once then I get 50% of CPU used.

The question is:
how to force to use Multi-Kernel processor to work at 90% (if needed) with one single Maple program?

It seems that this isn't a limitation to Maple, but for all other programs as well.
For example,

the equation is like the pic below:

int(sqrt(1+16*a^2*y^6+24*a*y^5*b+16*a*y^4*c+8*a*y^3*d+9*b^2*y^4+12*b*y^3*c+6*b*y^2*d+4*c^2*y^2+4*c*y*d+d^2), y = 0 .. .2)

i try it by Maple ..but did not get any answer of it ! anyone can help me with this ??or there is no real answer for it ?

since the equation got 4 unknown constants which are a,b,c,d ...so how to use maple to solve it ???

any idea and comment will be much appreciated ...thx

I have a multivariable function, F(n, g(1,0),g(0,1),g(0,2),g(1,1),g(2,1),...,g(n,1),g(n-1,2),...,g(1,n)), of indeterminates g(i,j) (omitting g(0,0) - in other words - let L = set of all pairs of nonnegative integers, (i,j), which satsify 1<= i+j <=n) of the following form F = product over all the (i,j) in L of g(i,j)^h(i,j) / ((i!

I want  to calculate the derivative of Bessel, I do

why dont any of maples 11, 12, or 13 work properly in windows seven? for example: when i click on "open a file" or "save" botton, and then it opens a window, the respective window dont show "up one level" or "create new folder" and "details" bottons above it.

Hi

How can add the values of a list with the list as an argument of a function. As exmaple:

f([1,2,3,4,5]);

                              15

Thanks for any help,

Dat

 

I am running Maple 13.0 on Ubuntu 9.04 and I'm having Maple give me some strange outputs. 

In this first block of code, I define an expression f which I try to evaluate (unsuccessfully) at a partiuclar value of t and g.   If I expand first, then I get an answer, which is not correct.

These are the steps that I need to do

determine the domain and range of the functioon

determine the intercepts and asymptotes of the graph

locate the x-values where f'(x) and f''(x) are zero or undefined

then i need to determine where the relative extrema and the points of inflection occur (this i should be able to do if I can get the graph)

i have to know how to do this for two kind of function for a test tomorrow I missed all week because i was sick and we are allowed to use the software on the test.

here are the functions

Hello,

I have a system which is below:

 

X6-n4-n2, -n3+n1, -n4*X17t+n2*X9t, n3*X17t^2-n4*X17tt-n1*X9t^2+n2*X9tt, 130*X9tt-60*X17tt*n2*n4+60*X17tt*n1*n3-40*n2*X11+981*n2+60*n2*n3*X17t^2+60*n1*n4*X17t^2, -1500*X9tt*n2*n4+1500*X9tt*n1*n3+2250*X17tt+1000*n4*X11-14715*n4+1500*n4*X9t^2*n1+1500*n3*X9t^2*n2, n1^2+n2^2-1, n3^2+n4^2-1

I need to do primedecomposition for it. Maple could not do this for me kernel was lost. However system is not very big.

With version 10, I did this:

gammadist:=(x^(alpha-1)*exp(-x/theta))/(GAMMA(alpha)*theta^alpha);

simplify(int(gammadist,x=0..infinity),symbolic);

The result of the integral is 1.

When I do this exact same thing in version 12, I get an integral without any symbolic computation.

If I use assum(alpha>0): additionally(theta>0): then it will give me the same result.  However, in version 10 I also did

mgf:=simplify(int(exp(t*x)*gammadist,x=0..infinity),symbolic);

I'm trying to make a FFT from a 2s long input file by using the obsolete FFT-procedure, but strange thing is: No matter what first argument they receive (3, 2, 1, 0 even!) the result is always the same; even more strange is: Writing out the signal after the FFT it's exactly the same as before as if the FFT never would've happened.
What am I doing wrong?

First 330 331 332 333 334 335 336 Last Page 332 of 361