A correlation matrix is a table that indicates the correlation. It works best with variables that have a linear relationship with one another. Coefficients for various variables The Correlation matrix depicts the relationship between any two values in a table. Correlation matrices are used to identify relationships between variables, as an input to other types of analysis (such as PCA), and as a diagnostic tool for checking analysis results. In Displayr, the Correlation Matrix function uses a library specifically designed to generate the Heatmap output. The coefficient indicates both the strength and the direction of the relationship.