Maple Questions and Posts

These are Posts and Questions associated with the product, Maple

I found on the internet a basic definition of mean reversion ( http://mathworld.wolfram.com/ReversiontotheMean.html )

I would assume such definition would also work as an definition of stationarity:
 

" Reversion to the mean, also called regression to the mean, is the statistical phenomenon stating that the greater the deviation of a random variate from its mean, the greater the probability that the next measured variate will deviate less far. In other words, an extreme event is likely to be followed by a less extreme event."

Hi,

errors such as

"Error, (in ImportMatrix) file or directory does not exist"
"Error, Matrix index out of range"

can I redefine the error message in a procedure?

say if "Error, (in ImportMatrix) file or directory does not exist" happens,

I want it to printf("You have not got the message yet.")

Generally, what shall I be looking for in the help in Maple?

 

Thanks.

casper

 

for what value or interval of p (-infinity < p < infinity) the following is valid

 

(1+x)^(m+1) > (1+x^m)* 2^m

 

here x > 1

Hi,

 

myproc:=proc(name)
local i;
i:=10;
save i,"i_name";
end proc;

myproc(bob);

basically, I want to save the value i in the file that has name i_bob in this case.

how should I do that?

and dose it work the same way with Matrix? say I would like to Export a Matrix with name Matrix_bob, (or whatever I input in the myproc proceudre? )

 

Thanks.

 

I have a system of five big big big differential equations with a lot of Sin and cos. The system is not complex itself but we have complex  initial condtition?

How can I solve my system with maple with dsolve or something else?

 

Thanks

 

Have attached a worksheet with some questions about getting easy to read answers when solving a trigonometric equation and some other things using the context menu.

Pleas answer in an attached document since my Webb browser of some reason cannot read maple math in the forum.
Yours
Gustav

P.S. I use mapel 12

Edit: removed duplicate content (moderator)

Hi,

How can I read a file that has " in the context correctly? (see the attached file)

Download 7845_not_good.txt
View file details

> read "notgood.txt";

Warning, incomplete quoted name;  use ` to end the name

on line 1, unexpected end of input

Error, while reading `notgood.txt`

 

I have attached a maple document with some questions.  Pleas answer in an attached document since my web browser of some reason cannot read maple-math in the forum.
By the way admin should take a look at the
I have attached a maple document with some questions.  Pleas answer in an attached document since my web browser of some reason cannot read maple-math in the forum.
By the way admin should take a look at the

question1:

DEtools[phaseportrait]

([diff(y(x),x)=-y(x)],y(x),x=-2.2,[[y(-2)=2],[y(-2)=1],[y(-2)=-2]],dirgrid=[17,17],arrows=LINE,axes=NORMAL);

This is the version in Maple 7?

After accessing to the help file,maybe it should be

with(DEtools):

phaseportrait(diff(y(x),x)=-y(x),y(x),x=-2.2,[[y(-2)=2],[y(-2)=1,[y(-2)=-2]],dirgrid=[17,17],arrows=LINE,axes=NORMAL);

but can't generate the resuls.

dirgrid seems not exist in the help.

 

question2:

 

for what value(s) of m the function is increasing (Xderivative > 0)/decreasing (Xderivative < 0):

 

m * log(x) / 2^m + (1-x^m) / (1+x)^m

Hi,

I got some Matrix problems to ask:

First,

A:=Matrix(3,4,[[1,2,3],[4,5,6]]);

it will fill with '0's

A:=Matrix(3,4,[[1,2,3],[4,5,6]],fill=8);

it will fill with '8's

B:=Matrix(3,4,[1,2,3,4,5,6]);

it will fill with '0's

B:=Matrix(3,4,[1,2,3,4,5,6],fill=8);

it does not fill

what's the proper way to do it?

Second,

A:=Matrix(3,4,[1,2,3,4,5,6]);

convert(A,listlist);

[[1, 2, 3, 4], [5, 6, 0, 0], [0, 0, 0, 0]]

 

what if I want to have ONE single list as

In my previous posts I have discussed various difficulties encountered when writing parallel algorithms. At the end of the last post I concluded that the best way to solve some of these problems is to introduce a higher level programming model. This blog post will discuss the Task Programming Model, the high level parallel programming model introduced in Maple 13.

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