This example adds labels for the index, row, and column of the scatterplot matrix to help reason about the grid layout. I wanted this example to maintain the color-by-diagonal pattern. After labeling the grid cells and some experimentation, I realized that

var row = Math.floor(i % rows);
var col = Math.floor(i / rows);
colors(row + col)

would generate the pattern I was looking for.

When a measure intersects with itself, this example shows the name of that measure in the style of the pairs plot implemented in the R package ggplot2.

Forked from Correlation Matrix I by micahstubbs

Originally inspired by the Simple Correlation Matrix block from emeeks