This is a data normalization function for the geometric mean, where we
multiplied the normalized data by 198 and add 1, with positive or negative
polarity
Usage
min_max_GM(data, pol = "pos")
Value
It returns a datafame of normalized data
Arguments
data
dataframe with rows = observations and columns = quantiative
pol
polarity if not selected is "positive"", otherwise write "neg"
Details
The ‘polarity’ of an indicator is the sign of the relation between the
indicator and the phenomenon to be measured ( + if the indicator represents
a dimension considered positive and - otherwise)
References
Massoli, P., Mazziotta, M., Pareto, A., Rinaldelli, C. (2013).
Synthesis Methodologies and Spatial Analysis. Composite indices for BES,DAYS
OF RESEARCH IN ISTAT, NOVEMBER 10-11, 2014