With our experience, you will get the best help in XLSTAT project, helping students have an easier time in college. XLSTAT is preferred to Excel for this because it is not constrained to the powers of two. WIREs Comput Stat 2012 doi: 10.1002/wics. In other words, we can say that Fourier Transforms perform an inverse transformation.

Limitations of this method are also described. The resulting method is equivalent to the standard presentation of nonparametric methods, and is amenable to convenient use in computer software. It deals with comparison of two fairly different approaches to classifying geographic data: K-means clustering and latent class growth modeling.

First present the classical statistical procedure, such as a t test or a correlation coefficient, and then perform the same operation on the ranks of the data instead of the data themselves. I am probably very late with my answer, but if you are still dealing with geo clustering, you may find this study interesting. The rank transformation is a convenient way to bridge the pedagogical gap between parametric and nonparametric methods in statistics. RT-4 describes situations where data are re-expressed within subgroups, and then ranked within subgroups. RT-3 involves re-expressing the data prior to ranking, such as subtracting a sample mean or median from the data and taking an absolute value of the difference prior to ranking. RT-2 involves ranking data within subgroups only, and not comparing data across subgroups.

RT-1 refers to ranking all of the data together, and giving the smallest observation the rank 1, the second smallest the rank 2, and so on. There are several forms of transforming the data to ranks. While the SQL language provides many functions designed to handle groups of data, identifying top or bottom strata within a set of rows is not possible using standard SQL functions. The rank transformation refers to replacing the data by their ranks, or average ranks in case of ties, prior to performing standard statistical procedures on the ranks. The Rank transformation differs from the transformation functions MAX and MIN because the Rank transformation returns a group of values, not just one value.

Rank transformation xlstat