ABSTRACT

Most techniques and concepts in a chaos analysis assume that raw data were measured at equally spaced time intervals. Only a few techniques have sophisticated variants to account for irregularly spaced data. Hence, the best approach by far is to measure data at equal time intervals. In fact, some assumptions or modifications usually have to be applied to any data that weren't measured at a fixed rate, so that they represent a constant time interval. There are three approaches or methods for doing this:

• Estimate new values by interpolation (Ch. 4). This is the most popular method.