## problem with Statistics [PointPlot]...

Asked by:

How to solve this problem:

style = line option is not executed within the command Statistics [PointPlot].

But right click on the graph Style / line is obtained as expected. Except that when you run the initial command, Statistics [PointPlot] ... back to the previous graph.

## Calculating non-zero matrix...

Asked by:

Hi,

If I have a 18x18 matrix, among are some which values are zero. If I would like to know how many of it are zero and how many are non-zero, what should I write please?

Thanks.

## NO Solution for ode...

Asked by:

hi

i have the following ode

.7246228659*(diff(f(x), x, x, x))+f(x)*(diff(f(x), x, x))+.6666666666-.6666666666*(diff(f(x), x))^2

with boundary conditions

f(0) = 0, D(f)(0) = a, (D(f))(b) = 1   (b corresponds to infinity and we can assume it 4 or 10 such that the solution converge)

i know the the solutions exist up to a critical value of "a" that beyonds no solution exist. for example for the following ode the critical value is...

## Euler's Nummerical - Solving Second Order Differen...

Asked by:

Hello!

I'm currently trying to program Euler's Nummerical Method to solve a second order differential equation, that I've split into two parts:

f1:=v:

f2:=-(0.006549/0.7038)*v-sin(x/1.03)*9.82

In an attempt to solve this equation by using Euler's in Maple, I typed in the following commands:

EulerSystem:=proc (f1,f2,t0,x0,v0,h,n) local t,x,v,i,p;
t[0]:=0; x[0]:=x0; v[0]:=v0;

## Proportionality check...

Asked by:

Hi,

I would like to have logical operator which will spit out true if my variables are proportional to each other, something like:

a:= A*some*other*stuff;

b:=A;

evalb(a ~ b);

gives true

Is there an easy way to do this?

## Fraction solving problems...

Asked by:

Hi,

I'm trying to have students solve a simple fraction problem like  \$a - (\$b + \$c)  /   (\$d - \$e), where each letter is a programmed variable and where \$d, \$e and its difference do not give zero.  The answer could be either a fraction, or an integer (if the fraction can be simplified).  If I use the Maple-graded type of question, this is possible, but the student can also write the initial fraction problem and get a good mark for it ! ...

## Trigonometric Simplification...

Asked by:

Greetingsi

Maple does not simplify the expression -2*Pi*sin(Pi*a)/(-1+cos(2*Pi*a)). How can I make it do so?

Thanks,

Maple 15 64-bit on Windows 7

## [Maple 15][Linux 64Bit] Bug in integration over a ...

Asked by:

Hi! I'm running Maple 15.01 64Bit on my Xubuntu 12.04.

I also got Maple 15 installed on my Windows7 64Bit computer to verify the results.

So let's see what is going wrong:

What does work?

int(x^n, x);

Gives me on both machines the correct result:

## Multiplying Matrix...

Asked by:

Hi,

Question 1:
In matlab, i write "Ck=zeros(18,18,6)" which will give me the answer Ck(:,:,1), Ck(:,:,2), Ck(:,:,3)... Ck(:,:,6).
I tried writing Ck:=ZeroMatrix(18,18,6) but it doesn't work. May I know what is the right way to write it please?

Question 2:
Relating to the above question, I now have several Ck matrix, Ck1, Ck2, Ck3... Ck6. and also several P matrix, P1,P2,P3...P6. Each Ck and P matrix are 9x9matrices. How can I write A:=Ck*P to give...

## How do I create a custom component for a specific ...

Asked by:

The input signal is given above. I don't kown how to get ti in MapleSim whether use custom component or not. Is there anybody can do me a favor. Thank you very much.

## Upper triangular...

Asked by:

Hi, I have a list of 15 numbers. I am trying to fit it into a triangular matrix. It will be a 6x6 matrix with zeros in the diagonal lines.

The first number will go into the M12, second number will go into M13, followed by M14... then, the six number will go into M23, seventh number into M24 and so on.

Here is what I got so far:

Z is a diagonal 6x6 matrix

node:=3
for i from 1 to (node*2-1) do

## File open errore...

Asked by:

Hello. I wanted to solve a parametric 16*16 determinant. My first question is, whether or not it can be solved?! after that when I tried to open my work in progress I got the following message: "
There were problems during the loading process. Your worksheet may be incomplete". Could someone help me recorver my work? Thanks in advance.

## Problems in creating program...

Asked by:

Hello,

we have to create program which shows chemical concentration changes, but this concentration depends on time and distance along the longitudinal axis. So we have to put numbers into the left side 41x41 matrix from 3 equations:

A:=1, B:=1,E:=0.2, Δx:=0.25,Δt:=0.025.

first when i=0;

## Trouble with nested loop...

Asked by:

Hi, I have a 18x18 matrix called Lambda.

I'm trying to get NewLambda which consist of "(Lambda(1,1)-Lambda(2,2))/2", "(Lambda(2,2)-Lambda(3,3))/2", ....,"(Lambda(17,17)-Lambda(18,18))/2".

Here is what I wrote :

for i from 1 to 17 do
for j from 2 to 18 do
NewLambda:=((Lambda(i,i)-Lambda(j,j))/2;
end do
end do

But it doesn't show me the NewLambda. Please help. Thanks

## I want to omit the independent variable and use th...

Asked by:

I want to omit the independent variable

for example:

> alias(f = f(x+y, z+y));
print(`output redirected...`); # input placeholder
f
> f1 := z = f(x+y, z+y);
print(`output redirected...`); # input placeholder
...

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