heatmap (cdata) draws the matrix cdata as a grid of coloured cells, each carrying its value, with a colour bar beside them. The columns are named '1', '2', …, and so are the rows.

heatmap (xvalues, yvalues, cdata) names the columns with xvalues and the rows with yvalues, vectors of distinct numbers, text or categories with one element for each column and each row of cdata.

heatmap (tbl, xvar, yvar) makes a column of each distinct value of the table variable xvar and a row of each distinct value of yvar, and colours each cell by the number of rows of tbl falling in it. With 'ColorVariable' naming a numeric variable, each cell holds the mean of that variable over its rows instead, or what 'ColorMethod' asks for: 'count', 'mean', 'median', 'sum', 'min', 'max', or 'none' where each cell holds at most one row. The categories of a categorical variable are taken in their order, those no row uses included; numbers, text and logical values are sorted. A row whose xvar or yvar is missing is left out.

heatmap (parent, …) places the heatmap in the figure or panel parent rather than the current figure. The heatmap takes the place of the current axes of its parent, and is refused where hold is on for them.

heatmap (…, Name, Value) sets properties of the heatmap; see stats.chart.HeatmapChart for all of them.

h = heatmap (…) returns the heatmap, a stats.chart.HeatmapChart object, whose methods sortx, sorty, xlim and ylim reorder and restrict its columns and rows.

See also: stats.chart.HeatmapChart, imagesc, crosstab

Source Code: heatmap