What is the “pdentrp” function in the “pdepe” function?

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Lanfeng Hua
Lanfeng Hua 2020-1-11
评论： feynman feynman 2024-2-13
I want to know the specific function and code of the “pdentrp ” function. I searched for “help” and some network resources, but there was no gain. Can anyone help me?
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回答（1 个）

Josh Meyer
Josh Meyer 2020-1-30
This is an internal, private helper function, so it does not have documentation beyond help text. You can access the file with the command
edit /MATLAB/toolbox/matlab/funfun/private/pdentrp.m
The help text for this function is:
%PDENTRP Interpolation helper function for PDEPE.
% [U,UX] = PDENTRP(M,XL,UL,XR,UR,XOUT) uses solution values UL at XL and UR at XR
% for successive mesh points XL < XR to interpolate the solution values U and
% the partial derivative with respect to x, UX, at arguments XOUT(i) with
% XL <= XOUT(i) <= XR. UL and UR are column vectors. Column i of the output
% arrays U, UX correspond to XOUT(i).
%
% See also PDEPE, PDEVAL, PDEODES.

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