Items tagged with splinespline Tagged Items Feed

cubic spline and b-spline

February 03 2013 by

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well i know this blog is for maple problems and question but badly need your help guys. i want to know difference between cubic spline and cubic b-spline in simple words..

how to define poly figures that enclose...

January 28 2013 by Maple

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Question.doc

Can you make geometric figures that hold a particular area within a given perimeter of 12 matches

My attempt was to start at origin 0,0 and move up 1 unit (a,b) and then 1 unit up or to the right (c,d) etc ... until you enclose the required area (defined by linear spline) s.t. perimeter =12. but it doesn't really work

plotting graph in 2d

January 28 2013 by

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Hi friends. Am trying to plot a graph that shows the difference between cubic spline, crank
nicolson and exact soution in 2d through this command but am not able to get it.
Whereas table is mentioned below at t=0.05
x	cubic	 crank	  exact0.05	0.0879	0.0855	0.07560.15	0.2514	0.2446	0.21940.25	0.3807	0.3708	0.34170.35	0.4625	0.4512	0.43050.45	0.4928	0.4815	0.47730.55	0.4747	0.4646	0.47330.65	0.4151	0.4609	0.4305

data smoothing using cubic spline

December 20 2012 by Maple 16

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Hello everyone,

I have data in Excel sheet. I want to make the data smooth using cubic spline.

My try can be found in the attached maple sheet. In my try, i was unable to see the

difference bewteen the exact data and the interpolated data. Please have a look and

help to smooth the given data in the attached Excel sheet.

Cubic_spline_smoothi.mw

Plotting gridded data on a globe

October 13 2012 by Maple

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I'm sure there are other Maple users who have done these things, but I'm in the early stages of learning Maple 15 after moving (up) from Mathcad.

1. How do I plot a simple wireframe map of the world?

2. If I have a dataset of gridded data where the data is in the form [latitude, longitude, number] how do I map that data to a grid on the globe and give it a height according to the magnitude of the [number]?

3. Is there a way to smooth the heights of each...

Trying to find corresponding x value...

October 10 2012 by Maple

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Hi folks,

I'm trying to find the x value of my data set that corresponds to 50% of area under the curve. I've used curvefitting and splines to generate a piecewise function, and am able to find the area under the curve between my two approximated zeros (as this is the only relevant region). I would greatly appreciate any help, as I've been pulling my hair out for a couple hours now!

Cheers!

extract data with interpolation

August 22 2012 by Maple 16

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hi

I have two sets of data namely x[i] and y[i], at first i want to pass a spline from all points (points are in 2d x-y diagram) and then extract some point from that. how can i write the suitable code  in maple?

thanks

partial derivatives of multivariate...

July 04 2012 by Maple

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In a related question to this answer (http://www.mapleprimes.com/questions/129140-Surface-Fitting#comment129195). How can we take partial derivatives of the multivariable fitting function (in the example above, the function B(a,b)?
It seems like the package CurveFitting only allows to numerically evaluate the fitted function when we use ArrayInterpolation, but I assume deep in the code there must be an analytic ...

Diagramm: Fit a function one some measured...

March 14 2012 by Maple 15

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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).

"Exact" cubic Hermite spline

May 21 2011 by Maple

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Following Christopher2222 request, I wrote the following procedures for "exact" cubic Hermite spline interpolation,

p:=proc(x0,p0,m0,x1,p1,m1,x)
local t,d;
d:=x1-x0;
t:=(x-x0)/d;
p0+(d*m0+(3*(p1-p0)-d*(2*m0+m1)+(2*(p0-p1)+d*(m0+m1))*t)*t)*t
end:

pb:=proc(x0,p0,x1,p1,m1,x)
local t,d;
d:=x1-x0;
t:=(x-x0)/d;
p0+(2*(p1-p0)-d*m1+(p0-p1+d*m1)*t)*t
end:

pe:=proc(x0,p0,m0,x1,p1,x...
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