Truth-table of 2 aggregated booleans

Crosstab2d.kt

import java.math.BigDecimal
import java.math.RoundingMode

class Crosstab2d(val colLabel: String, val rowLabel: String) {
	var tot: Int = 0
	val grid = arrayOf(
		intArrayOf(0, 0),
		intArrayOf(0, 0)
	)

	fun aggregate(colVal: Boolean, rowVal: Boolean) {
		val col = if (colVal) 1 else 0
		val row = if (rowVal) 1 else 0
		grid[row][col] += 1
		tot += 1
	}

	fun print() {
		val pcts = arrayOf(
			arrayOf(
				((BigDecimal("${grid[0][0]}.0000") / BigDecimal("$tot.0000")) * BigDecimal("100.00")).setScale(2, RoundingMode.HALF_EVEN),
				((BigDecimal("${grid[0][1]}.0000") / BigDecimal("$tot.0000")) * BigDecimal("100.00")).setScale(2, RoundingMode.HALF_EVEN)
			),
			arrayOf(
				((BigDecimal("${grid[1][0]}.0000") / BigDecimal("$tot.0000")) * BigDecimal("100.00")).setScale(2, RoundingMode.HALF_EVEN),
				((BigDecimal("${grid[1][1]}.0000") / BigDecimal("$tot.0000")) * BigDecimal("100.00")).setScale(2, RoundingMode.HALF_EVEN)
			)
		)
		val rowLen = rowLabel.length+2
		val rowBar = "-".repeat(rowLen)
		val rowSpc = " ".repeat(rowLen)
		println("$rowSpc   | $colLabel")
		println("$rowSpc   |     0    |     1    |")
		println("$rowBar---|----------|----------|")
		println("$rowSpc 0 | ${String.format("%8d", grid[0][0])} | ${String.format("%8d", grid[0][1])} |")
		println("$rowSpc   | ${pcts[0][0].toString().padStart(7)}% | ${pcts[0][1].toString().padStart(7)}% |")
		println("- $rowLabel --|----------|----------|")
		println("$rowSpc 1 | ${String.format("%8d", grid[1][0])} | ${String.format("%8d", grid[1][1])} |")
		println("$rowSpc   | ${pcts[1][0].toString().padStart(7)}% | ${pcts[1][1].toString().padStart(7)}% |")
		println()
		println("total: $tot")
	}

}