Influence of value is in the range [0 1]. Smaller range of influence usually create more and smaller data clusters and produce more fuzzy rules.
Squash factor contains a positive scalar. The smaller the amount of a squash, usually creates more and smaller data clusters.
Acceptance ratio of value is in the range [0, 1]. The acceptance ratio must be greater than the rejection ratio, and Rejection ratio of value is in the range [0 1].
Subtractive Clustering Options in MATLAB are described in the following link: