Drexel dragonThe Math ForumDonate to the Math Forum


Math Forum
 Ask Dr. Math
 Discussions
 Internet Newsletter
 MathTools
 Problems of the Week
 Teacher2Teacher
 Teacher Exchange
 Workshops

Search All of the Math Forum:
Browse our Internet Mathematics Library

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: How to insert a vector between two arbitrary points of a matrix?
Replies: 4   Last Post: Dec 21, 2012 11:45 AM

Advanced Search
Reply to this Topic Reply to this Topic

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
bartekltg

Posts: 17
Registered: 12/11/12
Re: How to insert a vector between two arbitrary points of a matrix?
Posted: Dec 13, 2012 12:56 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

W dniu 2012-12-13 18:28, Wojtek pisze:
> Thanks for your answer. Well, I would like the vector to fit between two
> points. It's length may be (and almost always it will be) changed to fit
> there. But how to change the size of a vector from N to M (M may be both
> bigger and smaller then N) without cropping it? Some interpolation is
> necessary. Do you have any ideas how this can be done?

new_Y = interp1(data_X, data_Y, new_X);
for linear interpolation, or

new_Y = interp1(data_X, data_Y, new_X, 'spline');
new_Y = interp1(data_X, data_Y, new_X, 'pchip');


If you want to calculate many (new_Y/X) for constant data,
use piecewise polynomial.

PP = interp1(data_X, data_Y, 'linear'/'spline'/etc, 'pp');
and ppval function.

bartekltg

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2013. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.