P.S. I found mistake in my message. >In my forecast, the "line" is the direction of variable Correct word is "row". Sorry for my mistake.
2019年3月11日(月) 21:37 Tetsuo Koyama <[email protected]>: > Dear Yves > > Thank you very much. > > Best Regards, > Tetsuo > > 2019年3月11日(月) 21:35 Yves Renard <[email protected]>: > > > > Dear Tetsuo, > > > > Yes, in the expression Grad_u * h, h is a direction vector. > > > > Best Regards, > > > > Yves > > > > Le 11/03/2019 à 13:31, Tetsuo Koyama a écrit : > > > Dear Yves > > > > > > Thank you for your reply. > > > I really like the design of regular expression. > > > Is h means direction vector? > > > Sorry to ask about such minor details. I just want to be sure. > > > > > > Best Regards, > > > > > > Tetsuo > > > > > > 2019年3月11日(月) 21:08 Yves Renard <[email protected]>: > > >> > > >> Dear Tetsuo, > > >> > > >> It is not easy to find, but the index order in a tensor is shortly > > >> explained in the following part of the documentation : > > >> > > >> http://getfem.org/project/appendixA.html#example-of-elementary-matrix > > >> > > >> For a gradient, each row is the gradient of a component in such a way > > >> that Grad u * h is the derivative in the direction h (so in a sense it > > >> is a derivative) > > >> > > >> Best Regards, > > >> > > >> Yves > > >> > > >> > > >> Le 11/03/2019 à 12:17, Tetsuo Koyama a écrit : > > >>> Dear GetFEM++ Project > > >>> > > >>> Sorry to ask many question. > > >>> I want to ask about regular expression. > > >>> When using "Grad_" in regular expression in 3D MeshFem. It seems that > > >>> it create 3D tensor. My question is that the meaning of line and > > >>> column. > > >>> In my forecast, the line is the direction of variable and column is > > >>> the direction of gradient. Is it correct? > > >>> Is there any related part in the document? > > >>> Thank you for reading. > > >>> > > >>> Best Regard Tetsuo. > > >>> > > >> -- > > >> > > >> Yves Renard ([email protected]) tel : (33) > 04.72.43.87.08 > > >> INSA-Lyon > > >> 20, rue Albert Einstein > > >> 69621 Villeurbanne Cedex, FRANCE > > >> http://math.univ-lyon1.fr/~renard > > >> > > >> --------- > > >> > > > > -- > > > > Yves Renard ([email protected]) tel : (33) > 04.72.43.87.08 > > INSA-Lyon > > 20, rue Albert Einstein > > 69621 Villeurbanne Cedex, FRANCE > > http://math.univ-lyon1.fr/~renard > > > > --------- > > >
