I have a problem using variables values that were read form Maple library file (*.mla) with units.

For example:

In the first file called "calculations.mw" I calculate a variable with units and save value to "lib1.mla" file

Download calculations.mw

In the second file called "document.mw" I can read the value of a variable, but can't use it in expressions:

Download document.mw

Where I made a mistake? 

This is somehow an old problem which came back and I decided to post it. So, I have some code which runs in Grid framework locally. Each node saves data directly to hard disk and there is no need to return anything at the end to the node of ID 0. Nevertheless, I noticed that memory usage on one instance of the mserver is very huge.  Moreover, this instance is all the time in S state, namely sleeping. Below you can see dump from top. I deny this is caused by some particular procedures called in my code since in this case I should rather observe more uniform memory usage. I am not sure if for this moment I could share some code with you which demonstrate this behavior. I will try to write some toy example because my productive code cannot be posted here.

%MEM     TIME+ COMMAND

49.1 17:00.19 mserver
0.1 12:43.70 mserver
0.1 12:32.15 mserver
0.1 13:54.02 mserver
0.1 14:45.45 mserver
0.1 12:35.22 mserver
0.1 13:50.77 mserver
0.1 14:14.85 mserver
0.1 8:58.82 mserver
0.1 12:58.48 mserver
0.1 8:51.00 mserver
0.1 10:35.92 mserver
0.1 12:58.13 mserver
0.1 9:34.39 mserver
0.1 10:10.13 mserver
0.1 12:07.77 mserver
0.0 8:21.17 mserver
0.0 11:41.42 mserver
0.0 5:07.27 mserver
0.0 8:31.88 mserver
0.0 6:30.12 mserver

hi.please see attached file below and help me for gain real or complex answer 

with out show answer in root of manner

thanksroot_of....mw

(Some) prime reciprocals have an interesting property. the repeating sequence has length p-1.

eg 7, has repeats after 6.

1/7=0.142857142857......

17 has repeats after 16

1/17=0.05882352941176470588235294117647059.........

of course some primes don''t have this property....

So what I need the experts here is for some code

myproc(17)=16, (and the sequence) 0588235294117647

my go:pinched from

http://199.71.183.11/questions/39621-Pattern-Matching-In-A-Sequence-Of-Digits

PriDigits := "" || (op(1, evalf(1/17, 50)));

reps := StringTools[Repeats](PriDigits);

lngth := seq(op(3, A), A in [reps]);

the leading 0 (which is part of the sequence)  is a problem.....

Is there a way in Maple to convert a list into a string of numbers?

So [1,2,3,4,5] -> 12345

I have tried Maple help, but there are too many convert commands to try them all.
And the ones I have tried didn't work.

Thanks.

Hello! Hope every is fine. I want to expand all expression of exp of the attached file like this

exp(c[1]*t+d[1]*n-d) = exp(c[1]*t+d[1]*n)*exp(-d)

waiting your kind response.

Help.mw

Mob #: 0086-13001903838

Hello! Hope everything fine with you. Please share the command to find the max and min values of the attached function, I had tried but I was only for one variable. I am waiting your quick response.

Examples.pdf

Mob #: 0086-13001903838

I was trying to make a function (or procedure) that uses the simplify command and outputed all the different types of simplify that are in the right click menu.  I never know which one to chose so until I get the hang of what they are, I wanted to see all of them at once.  Can someone set me off on the right path?

Hi there. 

I have a equation following:

with letters {a,b,c,d,k} is missing all solutions ,but with {z,u,w,t} letters works fine.

--------------------------------------------------------------------------------

Bug_maple.mw

I_Mariusz

Hello,

i want a plot with labels = ["x values", "y values"] but without displaying y-axis

thanks in advance!

Hello.

I want to use units in my calculations, but i recieved an error. I have attached my file. Could you please help me to solve it?

Thank you.

Download Prestressed_Concrete.mwPrestressed_Concrete.mw

A calculation I am currently doing has gotten to the stage where the time taken to integrate is just too much.
I have attached a minimal working example Maple script showing an example of the integration which is very messy. When this is run it takes ~ 10 seconds on my machine which is no issue. However the polynomial sum in this example is only a small version, and it can get, much, much larger. To the point it takes over a day to calculate (but it does evaluate).

The reason for this is that the boole integration method does not scale well with more terms in the sum. It beats the other methods for small sums (like in the example) but when the sum gets larger is not that good. The Riemann method appears to be the best for larger sums, but once again is still slow.

Is there any way to speed this up? As the Boole method is fast for this example and gives a good answer, I was thinking to break the much larger sums into smaller seperate sums and then process them all seperately with the Boole method and add up all the results?

Large_sum_integration.mw

Any feedback would be appreciated :)

To check the point on the belonging to the segment I use the algorithm shown in the example. This is an example of intersection of the two segments in 2d. (We not check for parallelism.) We find the point of intersection of the corresponding lines and solve the equation f1 with respect to t and f2 with respect to tt. If 0 <= t <= 1, then the point belongs to the first segment, and if 0 <= tt <= 1 then the point belongs to the second segment.
(Similarly we can check point on the belonging to the segment in 3d.)
In the example point belongs to the second segment, but not the first. These segments do not intersect.
Question: Is there a function in Maple to find the intersection of the segments or to check on the belonging segment point, to make shorter?

segments_intersection.mw 

I want to plot a function given different value combinations of parameters. I used the following code and it doesn't work. Could anybody please help?