It's proper name is "Parallel Coordinates", popularized in the 90s. Pro: - Spacing saving. Cartesian space is expansive as the X/Y axis can quickly take up the

It's proper name is "Parallel Coordinates", popularized in the 90s. Pro: - Spacing saving. Cartesian space is expansive as the X/Y axis can quickly take up the entire 2D plane. Turning the axis parallel to each other saves a lot of space hence the possibility for multi-dimensionality. Con: - Messy. A normal dot in X/Y scatter plot is "stretched" into a line. So a lot of crossings/overlaps. - Order of the axes matters Interactivity can help reduce the visual complexity, through axes reordering, or highlighting (also called "brushing"). Also, after little bit training, people can easily develop the ability to recognize patterns in Parallel Coordinates, just think how you learned to read the regression lines in scatter plots : )