Unanswered Questions

This page lists MaplePrimes questions that have not yet received an answer

Hey guys,

How can I create a bar chart or a column chart, with specific x values under the bars.

Would be great If someone could help me.

Thank you;) 

Is there some basis containing polynomials of the form x[1]^p*x[2]^q+x[2]^p*x[3]^q+x[3]^p*x[1]^q, (p,q posint)?
Are there known relationships between these?

Note: these are not the symmetric polynomials.

I want to arrange this equation in term of powers of x and then plot the  real and imagenery part of x vs y. How can I do this with Maple?
1-alpha*((1/x^2)+(1/(x-y)^2)+(1/(x+ay)^2))=0;

1.mw     (alpha and a are constant, for example alpha=1 and a=0.3)

Does anyone by any chance know why I might be getting this error?

I'm working with polynomials that have coefficients with many digits (16).

Thank you in advance,

Who deleted my post - "How to factor out specific parts from expression"

Hi,

I want to solve system of  PDE equations by maple and i dont know how can i write it codes that can solve them for me. Can anyone help me please??!!

 

So I just noticed that if you want to animate something in real time, the best you can achieve is something close but not exact.

For example lets say we have a ball travelling 22 m/s over 1000 m and I want to animate that in real time. 

ball := proc(x, y) plots[pointplot]([[x, y]], color = blue, symbol = solidcircle, symbolsize = 40); end proc:
animate(ball, [22*t, 0], t = 0 .. 1000/22, frames = floor(1000/22));

frames has to be an integer value so determining how long it will take and adjusting the frames to 1 frame per second.  It requires a bit of manipulation to get it right.  Is there a better way?  I suppose boosting the frame rate and increasing the number of frames would work but then it becomes cumbersome and any large period of times would use a high number of frames and consume enormous amounts of memory. 

Every time I open Maple it has the invitation to Login in the top right-hand corner.  I would like to sign in but have had quite a bit of trouble doing that.  I have a user name and password with Maplesoft web store and the same for MaplePrimes.  Should either of these work to log in? 


 

with(plots); with(LinearAlgebra)

NULL

NULL

NULL

couples := [5, 0], [6, 0], [6, 3], [10, 3], [7, 5], [9, 5], [7, 7], [8, 7], [5.5, 9], [3, 7], [4, 7], [2, 5], [4, 5], [1, 3], [5, 3]

Points := Matrix([[5, 6, 6, 10, 7, 9, 7, 8, 5.5, 3, 4, 2, 4, 1, 5], [0, 0, 3, 3, 5, 5, 7, 7, 9, 7, 7, 5, 5, 3, 3]])

NULL

Homothety

 

W := Matrix(2, 2, {(1, 1) = (1/60)*k, (1, 2) = 0, (2, 1) = 0, (2, 2) = (1/60)*k})NULLNULL``NULLNULL

Rotation on x axis

 

NULL

X := Matrix(2, 2, {(1, 1) = cos((1/90)*Pi*k), (1, 2) = sin((1/90)*Pi*k), (2, 1) = sin((1/90)*Pi*k), (2, 2) = -cos((1/90)*Pi*k)})````NULLNULL

Rotation of angle k

 

Y := Matrix(2, 2, {(1, 1) = cos((1/180)*Pi*k), (1, 2) = -sin((1/180)*Pi*k), (2, 1) = sin((1/180)*Pi*k), (2, 2) = cos((1/180)*Pi*k)})NULLNULLNULL

``

n := Multiply(Y, Multiply(X, Multiply(W, Points)))

_rtable[18446746437110297774]

(3.1)

NouvCouples := seq([n[1, i], n[2, i]], i = 1 .. 15)

Sapin := animate(polygonplot, [[NouvCouples], color = "ForestGreen"], k = 0 .. 180)

 

 

NULL

Neige

 

PointsNeige := seq([-30+i, 30-(1/2)*j*sin(i+j)], i = 0 .. 60); neige := animate(pointplot, [[PointsNeige], color = black], j = 0 .. 60, view = [-30 .. 30, 0 .. 30])

 

NULL

display([Sapin, neige], scaling = constrained)

 

NULL

NULL


 

Download Homework.mw

 

Hi, i need some help for a homework.

Here is the statement

You must first animate a series of linear transformations on the polygon formed by the following couples: [5, 0], [6., 0], [6, 3], [10, 3], [7, 5], [9, 5], [7, 7], [8, 7], [5.5, 9], [3, 7], [4, 7], [2, 5], [4, 5], [1, 3], [5, 3] It will be necessary to make, at the same time, a rotation around a line making an angle k with the axis of x, a rotation of an angle k and a scaling of variable ratio (but equal to 3 at the end animation). The k animation parameter should range from 0 to 180. I suggest you use the color green for your polygon. Then you will need to create a second animation by entering these command lines: SnowPoints: = seq ([- 30 + i, 30 - j / 2 * sin (i + j)], i = 0 .. 60): snow: = animate (pointplot, [[PointsNeige], color = black], j = 0 .. 60, view = [-30 .. 30, 0 .. 30]) : Finally, you will have to roll both animations at the same time.

The GIF shows the results that I should get according to my teacher

Thanks for the help !

In the obselote book programming examples it is using array's as data type

Is het easier to use A Vector or Matrix as datatype?

Error occurred running sample test.java (at new EngineCallBackDefault()):

# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffd66e7345a, pid=1740, tid=7716
#
# JRE version: Java(TM) SE Runtime Environment (11.0.1+13) (build 11.0.1+13-LTS)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (11.0.1+13-LTS, mixed mode, tiered, compressed oops, g1 gc, windows-amd64)
# Problematic frame:
# C  [maplec.dll+0x345a]
#
# No core dump will be written. Minidumps are not enabled by default on client versions of Windows
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.

Dear all

I compute the solution of first order nonlinear ode, supplied to initial condition.

The code is written, the exact solution is derived.

 plot the solution in a small interval like (0,1/5) I see that there is no difference between exact and semi-analytical soluton.

But, If I plot the solution in other interval like (0,1) or (0,2), It is noticed that the semi-analytical solution is different to the exact solution. 
Thansk you in advance for your help 

test3.mw

Apparently a colon within a string causes some issues when generating a XMLElement.

Didn't find anything in Maple Help about that though.

with(XMLTools)

dummy := "NS-EN 1995-1-1, part 1-1, Section 6"

"NS-EN 1995-1-1, part 1-1, Section 6"

(1)

XMLElement(dummy)

_XML_Element(_XML_ElementType("NS-EN 1995-1-1, part 1-1, Section 6"), [], [])

(2)

dummy1 := "NS-EN 1995-1-1, part 1-1, Section 6: Ultimate"

"NS-EN 1995-1-1, part 1-1, Section 6: Ultimate"

(3)

XMLElement(dummy1)

Error, (in XMLTools:-XMLElement) element tag name `NS-EN 1995-1-1, part 1-1, Section 6: Ultimate' contains the namespace prefix `NS-EN 1995-1-1, part 1-1, Section 6', but there is no `xmlns' attribute

 

NULL

Download xmlns.mw

Good day everyone,

I have problem-solving this system of equations using Iterative Projection Theorem. Anyone with a better explanations please.

The equation is as stated below. 

 

Solve this set of equations using the iterative projection theorem.

(x1 - 2)2 + (2x22 - 6)2 - 5 = 0

(x12 - 4)2 + (x2 - 10)2 - 39 = 0

Take the provisional values of  x1 and x2 as x01 = 5, x02 = 4, 

Thank you in anticipation

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