## Statistical Analysis

This section offers a brief overview of how DADiSP can be used as a visual, statistical analysis tool on both single series and matrices of data.

## Single Series Stats

The following is a partial list of standard statistical and math functions that can be applied to a single variable data series. You can access most of these functions through the Math and Statistics option on the Analysis pull-down menu.

 Function Description AMPDIST Calculates amplitude distribution. AREA Calculates the area under a curve. DERIV Takes the derivative of a series. GRADE Sorts a series in ascending or descending order and yields an output series containing the indices (i.e., observation numbers) of the sorted input series. INTEG Integrates a series. LENGTH Displays the length of a series. LINREG Determines linear regression. LINREG2 Calculates linear regression of two. LOOKUP Picks selected points by index. MEAN Calculates the mean. MEDIAN Calculates the median. PARTSUM Calculates the partial sum. REORDER Rearranges a series based upon specified indices. SORT Re-arranges the y values of a series in ascending or descending numerical order. STATS Displays MEAN and STDEV. STDEV Provides the standard deviation.

REORDER is similar to SORT, however, it works much faster on larger series. For example,