how can i use the name of an assignment in a proc block instead of writing a big equation that i've calcuated before proc?

actually i want plot 2 equ. with an if , by use of some assignments before the proc. pls help me!

I was using Maple to solve some basic algebraic equations for my chemistry course, and came across a quirky behavior that has me baffled. When I type: (-5.05)(23.83-100)c = (4.186)(10)(23.83-22) I can right click on that input and solve for the variable c. If instead, however, I type: (-5.05)(c)(23.83-100) = (4.186)(10)(23.83-22) then Maple only gives me the option to isolate the expression for "c(-76". Can someone explain to me why Maple is doing this so I can better understand what is happening "behind the scenes?" Also, if it helps, I'm using Maple 11. Thank you!

How do I get expressions 2.3 to 2.5 from this old paper: projecteuclid.org/DPubS with maple? What is the standard (or otherwise) way to compute (symbolically)  this sort of thing with Maple, e.g., using intersect, assuming?  Nothing seems to work for me. Thanks.

Hi,

To evaluate some real integrals I use the 'assume' instruction to make sure all the quantities are real.  But Maple 12 can't seem to deduce the obvious inequalities from this - testing for them gives a FAIL result.  Here is a minimal example:

    assume(X,real, Y,real, w>0);

    is( (X+w)^2 + Y^2 >= 0);

If I have g:=x^2 , and I want to plot it against x^2 I should get a straight line,

but If I do plot(g,x^2) it says "Error, (in plot) unexpected option: x^2"

Can I plot arbitrary functions against arbitrary functions ??

Hello, i would like to use the animate function to simulate the drawing of a "rose curve" ( en.wikipedia.org/wiki/Rose_curve ): the effect i would like to achieve is like this

c := 3;

animate(plot, [[cos(d*t), sin(d*t), t = 0 .. 2*Pi], -c .. c, -c .. c], d = 0 .. 1);

 

the fact is that here i'm using cartesian coordinates (though parametric, not cartesian equations), while the rose curve is given by the equation

Hello! I am 100% useless with maple and i need some graphs to fill a report i am doing.

 

I need two sine wave graphs with different frequencies, i can plot a sine wave but i dont understand how i am supposed to do this in terms of frequency?

I also need to plot fourier transforms of each of these sine functions and to apply a wavelet transform to them.

 

If anyone could help me with any of this i would be so grateful!! Or even just point me in the direction of a help guide because i am struggling to find anything that makes sense!!!

Hello,

how does one create a piecewise linear function from a given set of points? Having np points [x[i],y[i]], I tried

Lf(q):=q->piecewise(seq('(q>=x[j]) and (q<=x[j+1]),evalf(y[j]+(q-x[j])*(y[j+1]-y[j])/(x[j+1]-x[j]))',j=0..np-1),ERROR("argument out of range!"));

but it did not work (invoking Lf(3); resulted in "Lf(3)," not in an actual number). Then I tried

(just got v12, haven't used it since v8) <--- my only excuse!

Trying to make a list of the centroids of the faces of a regular icosahedron. Here's my code:

***********

with(geom3d);

icosahedron(f,point(o,0,0,0);

a:=faces(f);

cent:=[];

printlevel:=-1; for k from 1 to 20 do point(A,a[k][1]):point(B,a[k][2]):point(C,a[k][3]);

print(coordinates(centroid(c,[A,B,C])));

cent:=[op(cent),coordinates(centroid(c,[A,B,C]))] od;
 

************

Is it possible to perform a Ztransform with initial conditions in Maple?

I want to calculate the Ztransfrom of following differrence equation.

Dv:=3*y(k)-4*y(k-1)+4*y(k-2)=(1/2)^k*Heaviside(k)

With.

y(-1) = 1

y(-2) = 2

For now I am using following command.

Opl:=ztrans(Dv,k,z);

I suppose that this command uses initial conditions zero.

 

Thank you in advance,

 

 

Hi all,

I would like to know how can I teach Maple to do the analytic integral of ln(x)*ln(1-x)^2 for x in [0,1] ]which has a solution of -6+Pi^2/3+2*Zeta(3) ~ -0.306018 (from Mathematica). I want this because I have to integrate an expression which has terms of this type and with similar x dependence with this being the simplest example.

I don't  think Maple has a closed form for this integral because when I use the command integrate(ln(x)*ln(1-x)^2,x=0..1) the output returns the function called.

Thanks

I'm trying to run the basic example posted in the hepf files at "OpenMaple, Java, Examples".  The procedure to produce a test.class file from the test.java file seems to work fine.  But I get an error message when I try to run the test.class file as per directions.  What I am seeing is

Exception in thread "main" java.lang.NoClassDefFoundError: C:/.../test

then a bunch of stuff and finally

Could not find the main class: C:/.../test. Program will exit.

eigs := Eigenvalues(H);
Error, (in simplify) too many levels of recursion
 

!!  I never asked Maple to simplify anything !! I'd be happy even if it came messy!  I was planning on only using the linear approximation of the answer anyway !!

In fact, what's strange is that I did the Eigenvalues of this exact same matrix a year ago using Maple 12 (I'm still using Maple 12) and it gave them to me.  The matrix is the same this time except the symbols have different names!