Least Squares is a method of curve fitting that has been popular for a long time. Least Squares minimizes
the square of the error between the original data and the values predicted by the equation. While this
technique may not be the most statistically robust method of fitting a function to a data set, it has the
advantage of being relatively simple (in terms of required computing power) and of being well understood.
The major weakness of the Least Squared method is its sensitivity to outliers in the data. If a data point is
widely different from the majority of the data, it can skew the results of the regression. For this reason, the
data should always be examined for reasonableness before fitting. KaleidaGraph’s Data Selection tool
provides a simple method of graphically removing outliers from a plot