MaplePrimes Questions

I have these 3 equations i am trying to rearrange into real and imaginarry parts. This is pretty easy execpt I am unable to rearrange C(k) into real and imaginary parts.

C(k)= H1(k)/ (H1(k) + iH0(k))

Is it possible to solve piecewise equations in maple? All I get is 'warning, solutions may have been lost'.

solve((piecewise(x<0,x,x>=0,x^2)=0));

Thanks.

 

I am trying to evaluate the hypergeometric function : hypergeom([1],[1.5],-z) where z is in the order of 1e-6. Its taking very long time where as if I use maple through matlab, then its quite fast !!. Evaluation of Gauss-hypergeometric functions for the similar arguments in maple is quite fast.  Is there any trick I can use for the fast computation of the confluent hypergeom in the case above?.

Thanks for any help

Good evening everyone

I am trying to solve this new problem the whole day up till now and as it is getting very late, I thought asking someone smarter than me might help in the end.

What I experience at the moment is that a written program of mine, as given below, works pretty well, when I set Digits to 10 or less. 100000 loops are not a problem. Yet, as soon as I start increasing Digits to values greater that about 15, my program crashes after about 100 loops. I can see what is happening: The RAM (2GB), is full.

I was wondering how you would convert a number to a Mayan number using Maple11.

I have the expression

(r(r+(1/2)*s))(sin(t)/(r+(1/2)*s)+(diff(y(x), x))/(r^2+(1/2)*rs))

and I want to obtain

r*sin(t)+diff(y(x),x)

I tried expand,collect,combine without success.

Hopefully I missed something and there is a simple solution.

Thanks in advance.

                                       Sandor

I have been reaading previous posts on plotting Dirac functions; in particular: Plotting the Dirac Function and How do I plot Cos(w*t) in frequency domain?

I'm doing a series expansion of complicated expressions using Maple. How can I limit the number of terms, and not the order of the series? To be more precise, I need the series up to x^2, but when I ask for series(expr,x,3) I get terms of x^(2.5) which I don't need. How can I get rid of them without dropping the x^2 terms? series(expr,x,2) truncates them.

Thanks a lot to whomever can help!

Hello Maple experts,

 

 

Plotting a procedure is this possible?

Greetings All

I’ve worked out a Fourier Series Expansion using excel and verified it by graphing it in excel to check my results.  See example

http://demos.onewithall.net/discrete_fourier_expansion_coefficients.jpg

Hello all!

I'm am trying to replicate a Berkeley MADONNA problem in MAPLE, and I'm having problems. For those with the great book "Chemical Engineering Dynamics" by Ingham, Dunn, Heinzle, Prevosil, Snape, it's the BUBBLE program.

Hello.

I am haveing one or two issues with vectors.

I am trying to calculate the Angle.

The angle is between

a = s -d -f

b = 3s + d

and then the unit vector which lies perpendicular to a and b

.....

To figure to angle out would you use

cos(theta) = a.b / ( |a| * |b| )

Am i way off or am i close?

Thanks

 

I have been playing around with vectors, and have managed to do all the usual mathmatical things with them, except for this.

How do i figure the value for |a|

I have vectors a, b, c.

I have tried help, and google, but cant seem to find out how to find |a|

Any help appreciated, thanks.

I'd welcome some advice please on how to control the points Maple uses when plotting in 2D. I have a function f(i) and I'd like it only to plot the points where i is an integer. I have tried including assuming (i::integer) but this seems to make no difference - maybe I have the syntax wrong. I have found the POINTS option but haven't worked how to use this for, eg, 100 points f(1), f(2), f(3) ....... without inputting each point separately (very tedious!) [in fact, even doing this for a few points I still cannot get it to work].

Any help very gratefully received.

Good morning everyone

I have a question concerning Maple file output. Is there a way, that I can produce multiple files with Maple using a loop? My main problem is how to get Maple to create files with different names, like file1.txt -> file2.txt -> file3.txt ..... because so far i figured, that

fopen("file[i].txt",WRITE) , with i beeing the loop index

does not work :)

Thank you for any help

 

Karl

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