Hi all, Is there anyway to solve this differential equation in maple? (diff(x^2, x))*(diff(w(x), x))/x^2 = 480*(Int(0.2538690379e-2*l^2/(exp(4.651162791*10^6*l^2+9.302325581*10^6*w(x)-1.600000000*10^9)+1), l = 0. .. infinity)); Initial conditions: w(0) at 0 and w'(0)=0. Thanks

How do I generate a list of equations with Maple procedure. My problem is this, I have a Pile embedded in the soil. L is the length of the pile, it is divided into t equal segments, thus there are t + 1 points along the length of the pile. The point 0 is at the tip, and point t is at the ground surface. Y[m] is the general deflection equation at any point m along the pile. My goal is to generate each equation for each points along the pile, such that I can invoke Maple solve function to solve the problem. Below is my input into Maple.

From format->autoexecute , I wanted to press "clear" but accidentally pressed "clear all" ... now all 200 of my autoexecuted functions (which were very carefully placed and is not easy to remember which ones they were!) have been removed and pressing edit->undo does NOTHING!

I'm so lucky that I save my maple worksheets every time I make big changes (so I have maybe 36 versions of this worksheet!) .... but should maple not be able to "undo" somehting THAT simple!

 

 

The question is:

 If the stock price today is 100 and the stock has a anual volatility of 12% what is the probability of that stock

being within a price range of [130 - 140] in 5 months time ?
 

 

Answer:

I tried the following do loop

 for k from 1 to 4 do

s:=0

xmp:=lstt[indlax[k]]

s:=ym(x)+s

end do

 

 

where xmp is getting a numeric value from list "lstt" for each k

ym(x) is a piecewise function containing unknowns x and xmp,

what I would like to get is ym(x) for each k, and sum them up

 

Thanks,

by the way, is there a nice way to copy the output (those arrays) and paste them into something like notepad? I'm really having a hard time (notepad just treats it as an image or something like that).

 

fredbel6

Hello, I've been trying for weeks to solve a system writen in its matrix form like: M*y(t)'' + C*y(t)' + K*y(t) = F(t) My system can have like 300 dof. If I generate all de equations and I use the dsolve/numeric command, it works but not all the time. I think that there is a problem with the Heaviside function that I have in some coefficients of my matrix. I've been reading in forums that it's better to have a first order system to solve complex problems. For that we can create a procedure as explained in the dsolve/numeric/IVP help.

Hello,

 

I have a problem in maple with conversion to the binary writing system.  I would like to convert integers into a binary string of fixed length.

 

So 7 should become [0,0,0,1,1,1] while 22 should become [0,1,0,1,1,0].

Is that possible? (it would save me quite some time).  I know there are methods to do binary conversion in maple but it's not really what I want.

 

Many thanks!
fredbel6

How do I get maple to solve A=BA, where AB is a two digit number and not multiplied together.  like 5=25.  Or for something more complex like A=BCA   5=125.  Can we get maple to show other possible solutions?

What I want to do is have Maple solve a set of operations where the answer is a multiple of the digits in the same order.  So something like A+B+C=ABC  or  B*A-C=BAC  etc...

I use Maple 13. The exported image file, for example .eps, is much smaller than V12. and the resolution is very low. How to change the resolution of the graphics? I find no way to change the DPI.

thanks

LH

Hi people,

I am kind of a beginner in using maple and need to make an animation of a little circle or a little square moving over a curve which is given. I have "the maple book" but it doesn't seem to explain anything like this. I have searched the internet but didn't find what i need. I really have nog idea how to fix this. I hope someone can help me out.

btw the whole problem is 2D so the curve is a function with only one variable

Thx in advance,
Jochem grietens

When I enter the followings commands with Maple 13, I get a result which I cannot understand.

 

restart;
with(RootFinding):
NextZero(t->cos(t), 0);
NextZero(t->diff(sin(t), t), 0);

1.570796327
FAIL

 

I expect to get an approximation to Pi/2 in both cases. Why does computing the derivative in the procedure argument change anything?

 

I have a set of data and I have tried to create a line of best fit of the function a(1-exp(b*x)) xx := [180, 120, 30, 340, 215, 285, 175, 36, 420, 77]; yy := [10724.5, 6163.1, 2509.1, 26308.8, 5669.8, 19183.5, 23020.2, 2570, 16199.4, 9013.2]; I tried to use the "nonlinearfit" function but so far it comes up with an equation which does not fit into the scatter graph which I have also created with the data. Is there any other way to do this? Thanks

How can I solve a system like:
A^2=A

det(A)=3

det(A+B)=7
 

where B is a given, say 3x3 matrix and A is an unknown 3x3 matrix?

Hi, all, I know it can work over field, but I am not sure whether the groebner basis can be computed over ring in maple. Also i know singular can do the work.