"meng yan" <firstname.lastname@example.org> wrote in message <email@example.com>...
> 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.