Pairwise Slopes
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Stat > Nonparametrics > Pairwise Slopes

Pairwise Slopes calculates and stores the slope between all possible pairs of points, where a row in y-x columns defines a point in the plane. This procedure is useful for finding robust estimates of the slope of a line through the data.

Dialog box items

Y variable: Select the column containing the y-variable.

X variable: Select the column containing the x-variable.

Store slopes in: Specify the storage column for the slopes.

Store indices in: Check to store the indices for each slope, then specify two columns which will contain the indices.