Diagonalization is the process of re-ordering the rows and columns of tables and charts so that the data forms an approximately diagonal line.

Jacques Bertin Jacques Bertin (27 July 1918 – 3 May 2010) was a French cartographer and theorist, known from his book ''Semiologie Graphique'' (''Semiology of Graphics''), published in 1967. This monumental work, based on his experience as a cartographer and ...

, ''

Semiology of Graphics Jacques Bertin (27 July 1918 – 3 May 2010) was a French cartographer and theorist, known from his book ''Semiologie Graphique'' (''Semiology of Graphics''), published in 1967. This monumental work, based on his experience as a cartographer and ...

: Diagrams, Networks, Maps''. ESRI Press, 2010, 168-169. This makes it easier for people to see patterns in the data. Diagonalization typically involves either

raw data Raw data, also known as primary data, are ''data'' (e.g., numbers, instrument readings, figures, etc.) collected from a source. In the context of examinations, the raw data might be described as a raw score (after test scores). If a scientis ...

, percentages,

mean There are several kinds of mean in mathematics, especially in statistics. Each mean serves to summarize a given group of data, often to better understand the overall value ( magnitude and sign) of a given data set. For a data set, the '' ari ...

s or residuals. Generally once tables are diagonalized one of two patterns appears: hierarchy or segmentation

References

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