Multiple Correspondence Analysis (MCA)

Reading time

ACM is the equivalent of ACP for variables exclusively qualitative. She doesn't place arrows, but rather terms and conditions.

The tabs:

⇒ Summary : the table of terms and individuals, including the breakdown of equity values and the table of percentages; ;

⇒ Correlation of Variables : the correlation coefficient of each variable with the first two axes—the proportion of the axis explained by that variable, on a scale from 0 to 1. It indicates which variable structures which axis; ;

⇒ Equity and Eigenvectors : details of the routes; ;

⇒ Terms and Conditions : coordinates, contributions, and Cos² for each mode; ;

⇒ Individuals : the same indicators for each individual; ;

⇒ Additional Variables : the proposed illustrative guidelines.

ACM-Specific Reading Guidelines:

⇒ Two similar approaches are frequently worn by the same people; ;

⇒ A location far from the city center is either rare or very distinctive; ;

⇒ An individual is at the center of their modalities, and, conversely, a modality centered on its individuals.

💡 The size of the symbols is proportional to the sample size: a large symbol far from the center indicates a robust result, while a small symbol far from the center suggests caution.