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This function is used for the polynomials, rational polynomials and other functions which can be expressed as linear functions of the parameters. You can use these functions to develop your own parameter determination function by using the functions provided with the Standard Regression Equations library provided with SigmaPlot. These functions are designed to be used in conjunction with SigmaPlot’s nonlinear curve fitter, to allow automatic determination of initial equation parameter estimates from the source data. The median function calculates the median of a range. stderr The stderr function calculates the standard error of a range. The stddev function returns the standard deviation of a range. The runavg function produces a range of running averages. The mean function calculates the mean of a range. The min function returns the smallest value in a range. The max function returns the largest value in a range. It can be used to calculate the average across rows for worksheet columns. The avg function calculates the averages of corresponding numbers across ranges. The statistical functions perform statistical calculations on a range or ranges of numbers. This function returns the hyperbolic tangent of the specified argument. This function returns the hyperbolic sine of the specified argument.

This function returns the hyperbolic cosine of the specified argument. This function returns the tangent of the specified argument. This function returns the sine of the specified argument. This function returns the cosine of the specified argument. This function returns the arctangent of the specified argument. This function returns the arcsine of the specified argument. This function returns the arccosine of the specified argument. SigmaPlot and SigmaStat provide a complete set of trigonometric functions.

The sort function rearranges data in ascending order. The nth function returns an incremental sampling of data. The if function conditionally selects between two data sets. The data manipulation functions are used to generate non-random data, and to sample, select, and sort data.