Exploratory data analysis for geostatics: trend analysis

Following the article   Introduction to  Exploratory data analysis for geostatistics   we will discuss each of the available tools to perform the exploratory analysis of the spatial data. We have discussed the  histograms ,    QQ-Plots , and Voronoï maps . Now, it is the turn for the data trends.

Trend? What is it?

Firstly we have to know what we are looking for. Certainly, you are already familiar with the notion of trend in the temporal series (the trend of unemployment is decreasing or increasing, etc …).

The topic here is spatial data processing. Therefore the notion of trend is a little different since we do not have, a priori, the variable time to organize our points in a temporal series. Continue reading “Exploratory data analysis for geostatics: trend analysis”