For topic 3, I learn about point data analysis. In this topic, I learn about spatial density, centography, and, pattern. Point can be categorized into 3 which is density (simple density, sampling density), centography (mean center, weighted mean center, and standard distance), and pattern (quadrat analysis, and nearest neighbour analysis). Mean center is the mean of x and y coordinates for a set of points. Centography is spatial equivalent for conventional descriptive statistic. Weighted mean center is produced by weighting each x and y coordinate by another variable. Besides that, I also study about quadrat analysis which so useful for finding out point pattern.
