The function checks if the input data are given in the correct form of a matrix of dimension
n x 4 containing
n trapezoidal fuzzy numbers characterized by their four values
inf0,inf1,sup1,sup0 each. The following conditions have to be fulfilled: (1) the number of columns of the matrix must be 4 (the four values characterizing each trapezoidal fuzzy number), (2) the four values of each trapezoidal number have to be non-decreasing. This function is used internally in almost all the other functions to do a preliminary checking if the input data are in the correct form.
can be any matrix.
The function returns the value 1 if the input fulfills all conditions, if not, the value 0 is returned.
In case you find (almost surely existing) bugs or have recommendations for improving the functions comments are welcome to the above mentioned mail addresses.
Asun Lubiano <firstname.lastname@example.org>, Sara de la Rosa de Saa <email@example.com>
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