# Items tagged with pointpoint Tagged Items Feed

### error in graph ploting

March 08 2013 by

0

3

am using this command in end of my code

> Points := [seq(seq([x[i], y[j], U[i, j]], i = 0 .. M-1), j = 0 .. N)];> Points1 := subs({BC, XY, op(SOL)}, Points);> pointplot3d(Points1, symbol = solidsphere, labels = [x, y, U], shading = zhue, orientation = [50, 70], axes = boxed);
but at last line am getting error
Error, (in plots/pointplot) incorrect first argument

### minimum indices in matrix

January 14 2013 by

2

5

hey i´m back again and need help to solve this situation Please:                                          restart;with(ArrayTools):                      ...

### Further Analysis of a Minimization Problem:...

September 14 2012 by Maple

5

1

This post is a further exploration of the optimization problem of finding a point on f(x) = sinh(x) - xe-3x closest to the point (1,7).  The problem is part of our Teaching Concepts with Maple web site, a collection of video examples and Maple worksheets designed to illustrate how Maple can be used to generate...

### Ploting 2 vectors

April 24 2012 by Maple 15

1

3

Dear friends

I want to plot a function with these coordinates in x and y directions where:

x=(0,0.0150754,0.0376884,0.0829146,0.0527638,0.120603,0.173367,0.203518,0.241206,0.286432,

0.316583,0.354271,0.39196,0.437186,0.474874,0.550251,0.58794,0.625628,0.678392,0.746231,

0.708543,0.81407,0.949749,1.1005,1.17588,1.33417,1.59045,1.91457,2.25377)

and

y=(1, 1.20603, 1.53769, 1.6, 1.77889, 2.74372, 3.49749, 3.9196, 4.43216,...

### Diagramm: Fit a function one some measured...

March 14 2012 by Maple 15

0

6

HI,

I measured some points. This points are plotted in a graph. Now I want to make a fit on this points.

I now that the fit-function has to be like this:

F = A + B1 x e^(-t/C1) + B2 x e^(-t/C2)

Problem: how can I create a fitting function like that?

The best thing I found is the "spline"-fit, but it doesn't work properly. It has to be one lonely function, not a summary of several functions (like spline).

### Error, (in plots/animate) points cannot...

February 19 2012 by Maple

0

3

Does anyone know what the beneath error stated after the following coding means, can't findthe solution,     Although looked in mapleprimes site, and thanks for Joe Riel who pointed out the same problem in 2010,2 June...
But, it seems there is still no vivid solution for such problem, how to followk:=20:m:=4:
p[0] := 1:
tr := 4:
frame:=100:omega[n]:=sqrt(k/m):
T[n]:=(2 pi/omega[n]):

### Function from numbers

February 07 2012 by Maple

1

6

Hi everyone,

I am trying to build a function of dsolve/numeric solution which would not include procedures for defining the value of it.

First, I need to extract solution as a 2-d array, which will contain all evaluated points of solution.

Next, I want to define a function from this set of points (like interpolation).

Say, I have an array or list of numbers (2-d points).

Now comes the main question: is there a way to interpolate some...

### point plot and colors

December 22 2011 by Maple

1

0

The code below, which is a PLOT structure, seems to be one of the more efficient forms of specifying individual colors for each point in a 2D point plot.

My central question is: what plotting command will construct this?

PLOT(CURVES(Matrix([seq([i,i],i=0..4)],datatype=float[8])),
STYLE(POINT), AXESLABELS("", ""), VIEW(0 .. 10, 0 .. 10),
COLOUR(HSV,
Array(1..15,[0.0,1,1,0.2,1,1,0.4,1,1,0.6,1,1,0.3,1,1],
datatype=float[8])
)
);


I know that I can call plot and pass the m-by-2 Matrix of point data, and specify style=point. But how can I pass in such a nice, efficient float[8] Array to specify the points' colors? I know that the float[8] Array is leaner than a long sequence of HFloats. But even in the simpler case of just two points: how can one pass the color option just once to specify the colors to be used for each of the points?

Oh, in case anyone's interested, another old-fashioned (but terser) was to get such a float[8], C_order Array is with the hfarray command.

### Circle equation

December 14 2011 by Maple

1

2

Hey there, this is my first post here, so hello to everyone.

I have (so far) one question. I have a circle equation like

x2+y2-6y+6=0

I know, that on a paper, I can convert it to the "normal" circle equation, from which I can read the middle point and radius of the circle. And now my question is, how to convert in in maple? I am using the 11th version.

I have tried solving this equation and (x-a)

### Affine Scaling Algorithm

November 26 2011 by Maple 13

This is the Affine Scaling Algorithm outlined by:

Linear and nonlinear programming with Maple: an interactive, applications ...
Paul E. Fishback,Paul F. Fishback

### Warning, may some solutions left / inter...

September 14 2011 by Maple

0

4

Hello everybody,

I try to find the intersection point for the following equation, but I didn't get any or just "warning, ..." where is the problem? and how can I solve this!?

> S1 := proc (t) options operator, arrow; F[1](t)*m[1]*(1-F[2](t)) end proc;
> S2 := proc (t) options operator, arrow; F[2](t)*(m[2]+F[1](t)*m[1]) end proc;
> F[1] := proc (t) options operator, arrow; (1-exp(-(p[1]+q[1])*t))/(1+q[1]*exp(-(p[1]+q[1])*t)/p[1]) end proc;

### Paper Models of 3D Plots

September 09 2011 by Maple

11

4

3D Paper Physical Model

### min and max points

August 31 2011 by

0

2

I have 2 arrays of data that I have calculated ( X1 and Y1). I plot them and can see the min and the max points. I need these points. I use the command:

P:=ExtremePoints(X1, Y1);

And it gives me:

P:=ExtremePoints(X1, [4, 2,3,1,5,0.3,4]);

I expected that P will be an array and when I used the command:

N:=ArrayNumElems(P);

It will give me the total number of the min and max, but it gives me a mistake.

I will...

### How can I create an ellipse and an ellip...

August 12 2011 by Maple 15

0

4

I need to create an ellipse and an ellipsoid (ellipse in 3D) through code. How would I be able to do this? Can someone please give me an example for each?

Also, I will need to create a line for an ellipse and a plane for an ellipsoid that intersect. Would I be able to find the intersecting points? Would I be able to find the function for the curve line that is created when a plane intersects an ellipsoid? Also, how would I find the surface area and volume...

### Error, (in writedata) Bad data found...

June 24 2011 by Maple

0

1

A := C/H/k*Q/R1/R2/(-1+R1)*(Q*R2*R1-R1*R2+1)-2*C*Q*(R1*R2+1)/H/k/(-1+R1)/R1/R2;

plot14:= plot(subs({Q=6,R2=8.75,k=4,C=1.96,H=7},A),R1=0..1,color=blue):

display(plot14,view=-15..10);

points:=op([1,1],plot14):

writedata("c:/khan/plotdata.txt",points,float);

Error, (in writedata) Bad data found undefined

Any one there?

 1 2 Page 1 of 2