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Historian Statistical Analysis Sample Report
This report calculates, for a specified time period, a number of statistical properties of a tag, such as average, maximum, minimum, standard deviation, 2 sigma and 3 sigma control limits, and correlation coefficients for other tags. It displays charts of various types for several of these variables.
The chart at the lower left is a plot of the main variable vs. time with sigma control limits indicated by the straight lines. The two charts to the right are scatter diagrams that show the correlation between the main variable and two other variables. The chart at the top right is a histogram of data values of the main variable that shows how the data points are distributed.
The following figure shows the worksheet associated with the sample report that contains the data used to generate the report.
