Interactive 2D statistics

Plot 2D data below and see the statistics interactively.

• Clicking on the area adds a data point.
• Clicking while hoding down an alt key removes the point under cursor.
• Hold down a shift key to start dragging the point under cursor

Principal component analysis (PCA) is a commonly-used dimensionality reduction technique. Dimensionality reduction is not necessary for low-dimensional data like this but, the vectors of the first and second principal components of the data are drawn on the area as brown and red lines.