Function c = moddiff(a,b,m) returns the difference b minus a by intermediation of modulo m. Input arguments a and b are numerical matrices. Each element in a is compared in pair-wise manner with the corresponding element in b. The rules of broadcasting are applied in this process. The function is also useful to calculate the signed difference between two angles. E.g. for angles in degrees: moddiff(a,b,360) (c) 2026 fabien van mook 2026.08.20 release of this file within package "fvm-miscellaneous" under GNU GPLv3+