Dear Maple Users

What am i doing wrong?

I would like to draw some areas between curves. I tried to use ?plots/implicitplot but I often need to use gridrefine option which consumes so much memory. When I want to draw e.g. the area between f and g:

f := x-> piecewise(x < 5, 2, x-3):
g := x-> piecewise(x < 4, x, 4):

I can do:

p:=plot({f, g}, color...

Hi, Here is what i have

with(LinearAlgebra):
nodes:=9:
Xfull:=RandomMatrix(nodes):

for i from 1 to nodes do
newXfull(i):=zip(`/`,Column(Xfull,i),Row(Xfull,1)(i)):
end do:

the answers are correct, but it gives me 9 sets of 9x1 matrix. How do I write so that it would give me a 9x9 output? As in, all the answers represented in one big matrix.

OR

If I join it one by one, I wrote << newXfull[1]>|< newXfull[2...

Dear Maple users

This might have been asked before, I'm asking because I believe the solution to my problem is simpler than what i found on google.

I have this problem:

How would you do the substitution below?

eq1 := ((2*mu[2]-2)*R[S]*B[n]*lambda[0]*mu[3]*n^2*N[p]^2+(-2*mu[2]+2*mu[2]^2)*R[S]*B[n]*lambda[0]*n^2*N[p]^2+d^2)/(d^2+b*n);

 eq2 := algsubs((2*mu[2]-2)*R[S]*B[n]*lambda[0]*mu[3]*n^2*N[p]^2 = q11, eq1);

Thanks

I am making a 2D plot and need to mark certain irregular points on the x-axis, so I managed to put tickmarks (and gridlines) at those points, and somehow Maple even labels each tickmark, which is what I want. 

Except, there is no room along the x-axis for all the labels, so I need the labels to appear vertically at each tickmark.

Is  there any way to do this? The only instructions I can find for vertical labelling just apply to axis labels, not tickmark or gridline labels.

Hola,
How can leave a trail/trace of black point in the yellow and purple screens? Something very similar to the option "animate / trace."

SVD-filtering.mw

Make it possible to take the numerical data of each screen from the "plottools [getdata]"

Gracias

Dear Maple Users

I wonder how I can use Maple to solve the problem:

for the potential \phi(r). The problem is from the artikle: http://en.wikipedia.org/wiki/Electric-field_screening

I'm particularly puzzled how to implement this differential operator and how to enter the Dirac delta function.

Thanks for any hints.

seriestoratpoly(series(simplify(LaguerreL(5, x)),x,6),['egf']);

seriestoratpoly(series(simplify(LaguerreL(5, a, x)),x,6),['egf']);

inverse z transform of sqrt(1-a^2)/(1-a/z)

restart;
alpha := 0;
s := x;
tau := alpha + 1 - x;
source := s*Diff(y(x),x$2)+tau*Diff(y(x),x)+n*y(x)=0;
sol := dsolve(source,y(x),method=laplace);
zsol := ztrans(sol,x,z);
convert(zsol, ratpoly);

sol := y(x) = _C1*invlaplace((_s1-1)^n*_s1^(-1-n), _s1, x)
zsol := ztrans(y(x), x, z) = _C1*invlaplace((_s1-1)^n*_s1^(-1-n)*z/(z-1), _s1, x)
Error, (in convert/ratpoly) expecting a Laurent series or a Chebyshev series

what are _C1 and _s1?

Maple 16:

Given Matrix A of size nRow,nCol, and a vector b of size nCol, I wanted to divide each value in column 
K by b(K) where k=1..nCol and the result will be a matrix B also of size nRow,nCol ofcourse.

For example, I want to do A[..,1]/b[1],  A[..,2]/b[2], etc.. for each column of A

The way I do it now is by using seq(), then convert the result to matrix, like this:

nCol := LinearAlgebra:-ColumnDimension(A):
B    := convert([seq(A[..,i]/b[i],i=1..nCol)],Matrix);

And it works.  But was wondering if there is a better way to do this. I tried to use apply map but did 
not know how to

Here is below the complete Maple 16 code I have:

------------------------
A := LinearAlgebra:-RandomMatrix(3,4);
b := MTM:-sum(A,1);
nCol := LinearAlgebra:-ColumnDimension(A):
B := convert([seq(A[..,i]/b[i],i=1..nCol)],Matrix);
MTM:-sum(B,1);  #verify the sum is 1

Dear Maple Users

I wonder if it is possible to somehow display what kind of substitution the integration tutor carried out. The tool is ultimately usefull, however it would be very instructive (in addition to the hints it's capable of giving) to see how a variable was "changed".

Is it possible somehow and how?

Thanks, Martin 

When I execute several times my maple code the program completely freezes, even though in the beginning of the code teh command "restart" is inserted. I work with matrices, perform integrations and derivations for their components and calculate eigenvalue problems. The freeze happens at no particulat block of execution.

Any thoughts?

Hello everyone,

In my code I know what size of matrices I can expect and so i declare a matrix before compmputing it's elements in two loops. Is that a good practice?

Thanks,

Samy

except kummer representation, can dsolve output simple? or any other method to do this?

s := x;
tau := alpha - 1 - x;
source := s*Diff(y(x),x$2)+tau*Diff(y(x),x)+n*y(x)=0;
sol := dsolve(source,y(x));
target1 :=ztrans(sol,x,z);

when N = 1
target2 := sqrt(1-a^2)/(1-a/z)*((1/z-a)/(1-a/z))^(N-1);