This macro calculates Sen's Slope which is a nonparametric alternative for estimating a slope for a univariate time series. This approach involves computing slopes for all the pairs of ordinal time points and then using the median of these slopes as an estimate of the overall slope. Sen's slope is insensitive to outliers and can be used to detect if there is a trend in the data.
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Suppose your data are in C2. To run the macro, chooseand type:
Click Submit Commands.