The
next episode of the MapleCast podcast series is out. It's called "The Business of Math" and is a look at the non-technical side of the math software business. The guest speaker is Dr. Paul Bragg, a scientist who founded a major scientific sales business in England. T4.
The original orthonomalization procedure of Gram-Schmidt is numerical not stable.
Therefore my question: Is the procedure which is implemented in Maple (Linear Algebra) the original Gram-Schmidt procedure or the modified Gram-Schmidt procedure, which is numerical (more) stable.
Thanks in advance,
Wolfgang
Maple seems to change from italic to normal font when I edit a command. This results in unrecognizable parameters. For example, putting the "1" in "p1" after the following command had been typed in, resulted in an error message:
implicitplot3d([p1, p2], x=-7..7,y=-7..7,z=-7..7);
Error, missing operation
implicitplot3d([p 1, p2], x=-7..7,y=-7..7,z=-7..7);
(p 1 being pointed out, and the 1 being non-italic.)
Note: p1 and p2 were defined prior to the above command as:
p1:=x+y+z = 1;
p2:=x+z = 0;
Why is this happening, and how can it be avoided?
Maple displays a defined procedure (yours or Maple's)as output when you enter definition or when you execute eval(
Hi all,
I'm currently using the diffalg package to eliminate unknown signals and use the known ones for diagnosis (fault detection). At the moment, I have generated a lot of smaller equation systems from the large one I'm trying to diagnose. However, I get a lot of equation systems (too many to solve all of them), some goes very quickly to solve, others take a loooong time (too long for my poor computer).
My question is, is there a way to "rank" the equation systems so I can start with the ones that have the highest probability to solve (other than the obvious number of equations in them)
After installing the critical security updates for Windows 2003 (August Bulletin) I've found that Maple 10 will no longer start. The splash screen appears though there is no progress bar. The splash screen (mws32.exe?) eventually dissapears silently leaving behind an orphaned maplew.exe.
Has anyone else had a similar experience with these updates?
Note: Classic Maple 10 starts with no problems.
According to the helpfile, the syntax for using the command ReplaceChild in the XMLTools package is
ReplaceChild(spec, XMLtree)
where spec is an equation which is acceptable to subsop(). However, when I try to do this:
XMLTools:-ReplaceChild( [1,1]="foo", doc);
where doc is an XMLtree I have previously defined, I receive this error message:
Error, (in ReplaceChild) child position must be specified as a positive integer, but received [1, 1].
Sounds like yet another oversight in XMLTools.
I'm in the process of manipulating Maple worksheets (both Classic .mws and Standard .mw formats) blindly from the command line. There are a surprising number of stumbling blocks in Maple that make this work difficult. While I've managed to worm my way around them one by one, I thought I'd take some time to just voice my frustration so that others are aware of these pitfalls.
I should note that I am using Maple 10.02 on a Gentoo Linux machine, feeding my commands into Maple through a standard pipe. I would update to Maple 10.04, but the updater program from the website continues to cause problems with Java. Another complaint? That might as well be...
I have the following matrix solution problem.
A-1 * C * D-1 * A * v = v
where C is a square matrix (integer values). A & D are diagonal matrices. (A-1 and D-1 are inverse matrices) The diagonal elements of D are the column sums of the matrix C. The diagonal elements of A also are integer valued). v is a vector of variables whose values I want to solve for.
I cannot figure out how I can get Maple to do this. Do I need to use some other software? It seems to me that I should be able to obtain a soltion to the problem. Is there a reason why there may be no solution?
Thanks.
As most of you have probably experienced, even Maple 10.4 in standard 2D Maple input has some strange editing behavior. Most of it is of the variety of "What you see is Not what you get". There are two basic kinds of things that can happen: (a)You get strange errors that seem impossible from the code that you can see, such as "missing operation" or "object used as name" or even "non-matching delimiters"; and (2) Your editing action happens much further away or much more extensively than your cursor position or highlighting would indicate.
This apparently happens because Maple is creating a parsing structure on the fly behind what you are editing and not visible to you. When some incomprehensible errors happen or Maple seemingly does not want to allow you to edit what you see is wrong, sometimes the only remedy is to retype whole blocks of code (possibly creating other errors in the process requiring the same cure, etc., etc.). Till Maple can supply us with a structural viewer that would allow us to easily find and correct such problems, I want to pass along some tips I have learned in my frustration.
Hello,
I would like to use the solution of an ODE as a function in Maple. For example:
ode := diff(y(x),x,x) = 2*y(x) + 1:
dsolve(ode);
The result, returned by Maple:
y(x) = exp(sqrt(2) * x) * _C2+ exp(-sqrt(2) * x) * _C1 - (1/2)
Now my question is how can I use this result as a function for calculating for example y(1).
Thanks for your help
JanE
Hello,
Im meant to create a program to compute inverse tan - tan(^-1)(x)
to a given accuracy. They gave examples in class of how to do it for
1+1/2+1/3+...
1+1/2+1/4+1/8+...
sin(x)
like to 8 decimal places or whatever.
here's what i got on my screen.
http://kr.cs.ait.ac.th/~radok/math/mat6/calc6.htm
This sort of has an explanation on how to get the taylor series for inverse tan. basically i was gonna try to copy and paste the output for the sin(x) eg. and just swap the taylor series to see if it would work.
ANY HELP WOULD BE APPRECIATED.
OUTPUT:
> sum_ex1:=proc(x)
Hello all,
I'm trying to plot the graph of 0.01*x''(t) + [x'(t)^2] = 0 , x(0)=1,x(1)=0, using the following program:
>ode:={0.01*diff(x(t),[t$2]) + (diff(x),t)^2 = 0 , x(0)=1,x(1)=0};
>S:=dsolve(ode,x(t),type=numeric,method=bvp[midrich]);
>plots[odeplot](S,[t,x(t)],0..1,color=green,style=line,symbol=square,symbolsize=8);
Before I can write the third line of the above code, I get a message saying "Newton iteration is not converging." I have tried increasing the absolute error,by adding the item "abserr=1e1" next to the item "method=bvp[midrich]" in the second line of the source code, but no joy there--the error message still comes up. Can someone please tell me what I can do to eliminate the error message and hence plot my graph? Or is there an alternative Maple program that I can use to plot the graph? Please note that the above program is NOT an initial value program, but a boundary value one. Thank you.
Will maple show Plank's constant "hbar" as one letter not three letters in 2D output?
