Hi all,

Say i have two Vectors:

V1:=Vector(2,[a,b]);

V2:=Vector(4,[d,b,e,a]);

and how do I get

V3:=Vector([d,e]);

?? I currectly use a crude way using 'set' operations:

V3:=convert(V2,set) minus convert(V1,set);

V3:=convert(V3,Vector); # Does not work straightford, so

V3:=convert(V3,list):
V3:=convert(V3,Vector); # Which works,

Also, is there a strightforward way to which elements are the same and their indices?

Let us consider the group of elements {(a,b,c,d): a::integer,b::integer,c::integer,d::integer,a+b+c+d=0, a=c mod 12} with the component-wise addition. How to represent it in Maple? Is it possible? What I know is

restart;

with(GroupTheory):

CyclicGroup(infinity);     

GroupTheory:-CyclicGroup(infinity, form = "fpgroup")

G := DirectProduct(CyclicGroup(infinity), CyclicGroup(infinity), CyclicGroup(infinity), CyclicGroup(infinity));

I need three orthogonal unit vectors, k, i, and j. I give the first two vectors, k=[sqrt(2)-1,-1,1] and i=[1,sqrt(2)-1,0], then use crossproduct to produce the third vector j=crossprod(k,i) . But it fails to produce the correct vector since dotprod(j,k) is not 0. 

I have a two-variable matrixfunction A(x,y) with entries A_i,j(x,y).
I want to use mtaylor for each entries and the result to store in a matrix B.
Is it possible to do using the map command?
If not, what methods do exist?
(Instead of typing mtaylor for each entires.)

Sandor

restart:

dsys := {diff(x(t),t)=y(t),diff(y(t),t)=-x(t),x(0)=1,y(0)=0}:

dsn := dsolve(dsys,numeric):

dsn(1);          [t = 1., x(t) = HFloat(0.5403023317785669),  y(t) = HFloat(-0.8414711011553073)]

rhs(dsn(1)[2]);                   HFloat(0.5403023317785669)

After solving  this system I wish to obtain a numeric value to the integral:

int(x(t...

DMS_13.mw

this code executes fine in  M13. but in M15 theres a problem. doesn't like the local.

i wish maple had a compatability/update feature like mathematica...

with insequence=true command, first, the first option is showed, then second, then third and so on.. but i want to show all options from in grpah, then animate in sequence.

hi  projet_TW.mw
 procedure_final_(1.mw

could someone help me.thanks

Hi,

     I'm reading in a file as

eigvect:=ImportMatrix("C:\\Users\\Sorted_Eigenvectors_1.txt", source=csv):

but I want to generalize this to 

eigvect:=ImportMatrix("C:\\Users\\Sorted_Eigenvectors_i.txt", source=csv):

where i is a positive integer, I tried

eigvect:=ImportMatrix("C:\\Users\\Sorted_Eigenvectors_%d.txt",i, source=csv):

but this is incorrect. What is the correct syntax?

Thanks!

Hello, im a current user of Maple 16, i have a problem in finding a minimum of equation ( equation of a external work equating the internal energy dissipation) f= E-W ( im studying a slope stability with limit analysis)

the equation is:

I have a 3dplot of a certain procedure with the color specified by another procedure. 

The standard color range, from red to purple, does not look very good in my application. Is there a way to change the color range to for instance: light green to dark red?

This is a very strange and specific issue I am having with any Windows x86 vm after having installed Maple 17. 

Before installing Maple 17 (and also AFTER installing it, before the reboot), I can open a command window while logged in as the local administrator and successfully issue a command like:

sc config BDESVC start= disabled

After installing AND REBOOTING for Maple 17, if I log in as the local administrator, open...

quartic_12.mw

Let A be a table. I give following sequence of commands:

>>B:=A;
>>A[x]=34:

Then surprisingly (at least for me) it turns that B has also changed its value for B[x]. Would someone help me understand this? What is it called? How we can stop this behaviour i.e. A and B should behave as independent tables?

regards

What are the main functions of the kernel Male and for which they are responsible?