Hi all,

I need a contour plot of c with a and b values as x and y axis.

a := `<,>`(Vector(12, {(1) = .19375, (2) = .19494, (3) = .19581, (4) = .19632, (5) = .19646, (6) = .19624, (7) = .19565, (8) = .19472, (9) = .19349, (10) = .19198, (11) = .19024, (12) = .18833}))

b := `<,>`(Vector(12, {(1) = -0.1517e-1, (2) = -0.1515e-1, (3) = -0.1512e-1, (4) = -0.1509e-1, (5) = -0.1506e-1, (6) = -0.1503e-1, (7) = -0.15e-1, (8...

Below is a small tidbit of code that operates on the matrix vel and updates its values.  When I check the values of the indices in the matrix, every single element, barring vel(1,1), vel(1,2), and vel(1,3), is equal to 0.

vel := Matrix(3, 241, datatype = float[8]);

step := 0.1;

vel(1, 1) := 5; vel(2, 1) := 95; vel(3, 1) := 3;

UpdateAllVelocities := proc (i, vel::Matrix, accel::Matrix, step);

#I understand these calls are quite pointless......

With a lot of languages, the compiler will issue warnings when the user does something that could cause errors. I often find myself mistyping or misspelling words in Maple, and this often leads to runtime errors.  Is it possible to make the interpreter issues warnings when I implicitly declare a variable or do something similarly risky? 

Here's my first attempt at posting some 2DMath on this site.

First, I will paste directly from 2D output in a running Standard GUI Maple session.

BesselJ(0, x)+GAMMA(Psi)-sqrt(abs(omega))

How can I build an increasing list using a loop?

Something like this

a[1]:= [...]
a[2]:= [...]
a[3]:= [...]

c[1]:=a[1]
c[2]:=[op(a[1]),op(a[2])]
c[3]:=[op(a[1]),op(a[2]),op(a[3])]

etc...

I thought about using a loop but then got stuck

for i from 1 to 3 do
  c[i]:= ???

Hi everyone.

I have been experiencing a problem trying to solve a coupled system of 4 differencial equations, 2 PDEs with 2 ODE.

My problem is that a got a message back as I try to solve the system:

"Error, (in pdsolve/numeric/process_IBCs) improper op or subscript selector"

My first question is: Am I defining the IBCs rightly?

If not, I don`t have a clue on how to solve this problem, I really apreciate some help out here.

Thanks for all the above input.

Now I have imported my text file using TOOLS->ASSISTANTS->IMPORT DATA .

Text file has 3 columns: x, y and z.

How can I get a contour plot 3d from this matrix i.e. plot z using x and y values as axes.

Thanks again.

Dear Colleagues, I need your cooperation.
How to make the following graphs to illustrate the SVD of a Matrix

How do I insert a hyperlink with this new site?  The link icon on the toolbar is grayed-out.

Just a simple histogram, but how do I select the values from the graph. 

op(b) pulls out the data of the graph

POLYGONS([[1., 0], [2., 0], [2., 1], [1., 1]], [[2., 0], [3., 0], [3., 0], [2., 0]], [[3., 0], [4., 0], [4., 1], [3., 1]], [[4., 0], [5., 0], [5., 2], [4., 2]], [[5., 0], [6., 0], [6., 1], [5., 1]], [[6., 0], [7., 0], [7., 1], [6., 1]], [[7., 0], [8., 0], [8., 1], [7., 1]], [[8., 0], [9., 0], [9., 4], [8., 4]], COLOUR(HSV, .5476190475, 1.000000000, .7000000000))

Can anyone explain the below printscreen in simple terms ?

It is taken from http://www.lgt.com/export/sites/inta_lgtcom/fr/institutionelle_kunden/kompetenzen/traditionelle_anlagen/lgt_and_science/aktuelle-projekte/quantitative-finance/Projekt_EfeAksueyek_en.pdf

on pages 24. Why do we have such a ratio (second formula) ?

Hi friends,
here is a paper from a book, which partiell diff equation I would like to solve with MathCAD or Mathematica or Maple. WHo can help? Thanks  a lot spending your time.  here is the PDF File with the paper

Is there a way to show posts in chronological order on Mapleprimes ?

.

 Hi
first : My English not good,so excuse me.
I have a problem with this:


1)C+Z*(C)*X=D where;

I know D , Z and X are matrix(n*n),(known)
but i can`t find C or Solve (1)finding C(matrix(n*n))

Help Me

Reza

In all versions prior to and including Maple 13 the Histogram default incorrectly displays the data.  Has this been fixed in 14?

eg.

a:=[1,2,3,4,5,6,7,8,9,8,9,7,6,5,4,2,2]

with(Statistics):
Histogram(a,frequencyscale=absolute,binwidth=1)

Clearly the...