Method xValue

plot/plotcore/tablexy.go:193–212

xValue returns an x value at given row in table

(row int)

// xValue returns an x value at given row in table
func (txy *tableXY) xValue(row int) float32 {
	if txy.table == nil || txy.table.Table == nil || row >= txy.table.Len() {
		return 0
	}
	trow := txy.table.Indexes[row] // true table row
	xc := txy.table.Table.Columns[txy.xColumn]
	x := float32(0.0)
	switch {
	case xc.IsString():
		x = float32(row)
	case xc.NumDims() > 1:
		_, sz := xc.RowCellSize()
		if txy.xIndex < sz && txy.xIndex >= 0 {
			x = float32(xc.FloatRowCell(trow, txy.xIndex))
		}
	default:
		x = float32(xc.Float1D(trow))
	}
	return x
}

// XY returns an x, y pair at given row in table
func (txy *tableXY) XY(row int) (x, y float32) {