f358c2aa-0d70-4be4-85e3-ce512ed62c1a 24 4 3 decimal

&[DATE] &[TIME] - &[FILENAME]

x y f 11 x + (3^+ 3 y * 1 x + (* - y 3^+ abs ln :

00 f 0.6931

Mesh U, V  within the bounds L, H L H N xd N intervals U 0 : dx H L - N / : i 1 N 1 + range U i el L dx i * dx - (+ : for U 21 line 41 line :

L 6 - :

H 6 :

N 151 :

U L H N xd :

V U :

U i el V j el f eval

t0 1 time :

Generate the symmetric square matrix x y f U V Sym r 1 : i 1 U rows range c 1 : j 1 V rows range M r c el U i el V j el f eval : c c 1 + : 21 line for r r 1 + : 31 line for M 31 line :

M x y f U V Sym :

M max 6.073

M min 6 -

The contour extractor , pair wise in X direction M ε cntr CONTR k 1 : i 1 M rows range j 1 M cols range M i j el cntr - abs ε ≤ u k el i : v k el j : 21 line k k 1 + : if for for u v augment 31 line :

ε 0.125 :

cntr 0 :

Q M ε cntr CONTR :

Q rows 18510

XY Q 1 col Q 2 col augment :

1 time t0 - 1103^* sec *

XY 0 2 1 sys

For a clean export, each vector in 'Q' must be striped from 0's, a long operation demonstrated in 'Contour Extract Advisor'. It might be posible to cubic spline each direction, for this have less points to avoid to 'tartine' the ε regions. This function was published in the forum Mathematica Stack Exchanged, not solved.

XY 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mat

------------------------------------

Strip 0's in vector

v Srip0 k 0 : i 1 v rows range v i el 0 ≠ R k k 1 + : el v i el : 11 line undefined if 11 line for R 31 line :

v 10305616 mat transpose :

v Srip0 transpose 135614 mat