I want to get a trapezoid from data i have

For example, I have data on the area where a seed, to be used in a 100-square-meter field, has been planted at three different times of the year and the extent to which it has affected the area. Let's say this data is 35, 78, and 54. Can I obtain a trapezoidal fuzzy number corresponding to this using Matlab?

[John D'Errico]

This is far too unclear to have an answer. First, decide the mathematics behind what you need to do. ONLY THEN worry about writing MATLAB code to accomplish what you want to achieve.