Interesting diagram encountered in London at the ‘ergonomics’ exhibit (thanks Alexandre Burdin for the picture). The horizontal axis corresponds to the duration of use of a certain button, while the vertical axis is meant to represent the frequency of use. Doing this enable to discriminate 3 clusters of remote control features.
A similar graphic can be designed for joypads, considering the use of various buttons. Definitely an interesting way to analyze a physical artifact.
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