i am working for a small project at home , and for it i am using an infra red sensor . which returns a voltage value relative to distance . this picture describes the output : (given by the datasheet) : (the picture is highly precise) now all of the distances that i will be getting are superior than 8cm so it's a bijective function for me . within the micro-controller , the only solution that was able to find is to make a large array of floats with segments of voltage and the corresponding distance values . i need high precision with this project so that solution would consume a massive amount of memory and would cut down from other of the project's aspects . is there anyway i can find a function that mimic with good precision the behavior of the evolution these values ? thank you .