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How can i ignore the singularity and gain values past this point? i get:

cannot evaluate the solution further right of 2.6991460, probably a singularity.

the program decsribes the motion of a double pendulum, so that the equations used show their angles relative to a normal...i want to gain information about these angles from a static point as time procedes. therefore the points will go back on themselves.




February 12 2010 vally1123 4

I have a question concerning list.

I want to calculate value of X which is sum of x[i]

And there is a list L of length n whose i th element is x[i].

How can I do it in maple using procedure? Hence, use this procedure to calculate L:=[1,4,5,6,8]



please help me here

suppose we know the following for a function which we donot know

x0 and f(x0)

x0 and f ' (x0) (first derivative at x0)

x1 and f(x1)

x2 and f(x2)

how can we approximate second, third and fourth derivatives of f(x)  for example say at  a point x3

I'm using maple 13 in document mode. When I want to designate a variable as the time derivative, I use the over dot symbol. The problem is that the output is displayed with the full derivative symbols in leibnitz notation. It's really hard to read when the my outputted equations are very long with higher order time derivative terms. Is there a way to get the output to be just displayed with the over dot symbol.?





how can we compare the malpe calculation and manual calculation.

I mean if we use maple to have a solution (different form) and then try to get the same solution manually (compressed form compare to maple), now i want to compare both the solutions using maple, whether the two solutions are same or not. 


I'm plotting some random points along a curve but I'm not sure of a couple of things so I have a few questions.

Using a simple curve like x for example.  First I'll choose some random numbers, 100, between -8 and 8, but I also want a couple of decimal points otherwise random integer values will only give me a maximum of 17 points.  So is the best way to do that like this?

a:=[seq((rand(-800..800)(i))/100,i=1..100]    # These will be my x point values;

I have used bubble sort to put my list in order but now i need help to rearrange the list.

For example l:=[2,2,2,3,4,5,1,3,7,8,9]
Bubble sort:= [1,2,2,2,3,3,4,5,7,8,9]

What i want to do is do, smallest&largest,next smallest & next largest
Like this - [1,9,2,8,2,7,2,5,3,4,3]
So as you can see its been rearranged so that their all next to each other.

Any help would be great.

Hi, all, I want to know whether I get a row of a matrix. For example, I have a matrix: [ 1 0 0 1] [ 0 1 0 1] M=[ 1 0 1 0] [ 0 0 0 1] and I want to the first row [ 1 0 0 1], how to do this? thanks Gepo

hello, i am generating an eigenvector of three elements. i need to assign each element a parameter...u,v,w. so for example if the vector is [1,2,3] then i want to assign u=1,v=2,w=3. can somebody pls show me.

the big picture is that i have 4 roots, and for each root i will have 4 eigenvectors, and i need to assign them to u[i],v[i],w[i], where i=1..4.


thank you


I read this forum  in which it says you have to extract units beforehand to plot.

The problem is that I have a lot of functions and I can't remove units by hand, so I wanted to use the command convert(........,unit_free) but  with no result

The function in the convert command is a piecewise. I upload the file


supporse for a function f(x) (which we do knot know), we know


x0  and f(x0)

x1 and f(x1)

x2 and f(x2)


how can we find best approximations for the first , second, third and fourth derivatives?

hi i think this is an easy one,

for a from 1 to 3 do sol:=solve(x^2=16*a,x) end do;

ok this gives us 6 solutions, 2 for each value of a. how do i display a particular solution?, for example i just want to display the solution when a=2, and then i just want the second solution of a=3... hope this makes sense


Thank you.

Hi, I'd like to substitute the expression A into B, where B is of the form


where a,b,c,p,q,r, are constants. The problem is: I only want the substitutions to be done outside of the unknown function f. So, if


Currently I have 500 values, I put them in an array x:= [a,b,c,d,.....] then using with(Statistics) plotted my histogram with Histogram(x) but this doesn't give me a very accurate histogram and there are only 10 or so bars. How can I make this better?

Been looking for about 15 minutes, and there simply isn't that much to look through.

Using Maple 13.0, I can't find the "Find Discontinuities" option that a bunch of walkthroughs insist are in the Plot Builder's Options menu.

Anyone know what I'm missing?

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