Applying Analytics

2-Dimensional Data Sets 169

FIGURE 7.9

Scatter plot comparing the climate data set’s temperature anomalies from the

1950s and 2000s. Each ‘x’ represents the pair (ψ

i,j

, φ

i,j

) associated with a

location (x

i

, y

j

).

7.5.2 Ratios of 2-Dimensional Data Sets

Ratios are a helpful technique to use in combination with scatter plots and

correla tio n coefficients for data s e ts measured with ratio scales on the same

measurement location arrays. Ratios can be used to identify regions o f the data

wherein the relationship between the two multidimensional arrays is different

than for the rest of the data. There are no major differences between how

they are employed with ...