Multi-dimensional data analysis parallel coordinates
1990
A Parallel Coordinate Plot in Five Dimensions of Automobile Data. Note the negative correlation between gear ratio and weight.
(Wegman, 1990)
Wegman, E. J. (1990) ‘Hyperdimensional Data Analysis Using Parallel Coordinates’, Journal of the American Statistical Association, 85(411), pp. 664–675. doi: 10.2307/2290001. [link]