The Math Forum

Search All of the Math Forum:

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

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

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: help : how to reverse 2-D lookup table ?
Replies: 10   Last Post: Oct 30, 2013 5:54 AM

Advanced Search

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

Posts: 5
Registered: 1/29/10
Re: help : how to reverse 2-D lookup table ?
Posted: Jan 29, 2010 9:52 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

"John D'Errico" <> wrote in message <hk02rr$d2$>...
> "meng yan" <> wrote in message <hk0036$c0k$>...

> > May be should use others means, the datas of T=T(a,b) are got by inner compute of matlab using Finit Element Analysis ,so I think it cann't simplly get a(a=a(T,b)), but there must have a means to do that . I aways try to use matlab's data process to achieve it ,but all have failed. Who have a good idears ?
> > meng yan

> It does not matter how this function has been obtained.
> If it does not have a simple, single valued behavior,
> then NOTHING can give you an inverse relationship.
> "Good ideas" are not sufficient to overcome a
> mathematical impossibility.
> And, if that relationship is a well behaved one then
> I'll be forced to repeat myself - it is then trivial to
> generate what you wish to see. A simple interpolation
> using interp1 will suffice to build your table.
> John

Thanks, John,I got you , it is impossible to got absolutely reverse ,I think i should try other ways. Thank you very much!

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

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.