area_spider_plot( data, plotArea )

Adapted from https://de.mathworks.com/matlabcentral/fileexchange/33134-radar-plot?focused=5201638&tab=function

This function plots a spider plot using the columns of P as datapoints.
Inputs:
P : the data as matrix.
optional: a boolean value to indicate whether to plot the data as area or as line plot.
Example usage:
area_spider_plot(P): plots data as line plot
area_spider_plot(P, true): plots data as area plot

legendchoices = {'data1', 'data2', 'data3'};

figure('rend', 'painters', 'pos', [100,100, 1000,800])
idx = area_spider_plot(data);
legend(legendchoices{idx});