Preprocess heatmap values for plotting

This includes capping on zmin / zmax values. If not provided, percentiles 0.01 and 0.99 are used, to match plotting of other similar tools. If provided, a specific order of rows is used. Otherwise, rows are sorted by rowMeans. If the number of rows in the matrix is larger than a certain max_rows_allowed value, number of rows is reduced to max_rows_allowed. Rather than subsampling each row then will represent an average of the underlying rows.

Usage

.preprocess_heatmap_matrix(values, zmin, zmax, order_by, max_rows_allowed)

Arguments

values

Matrix to preprocess

zmin

Minimum value to show in color.

zmax

Maximum value to show in color.

order_by

Row order (or NULL).

max_rows_allowed

Maximum heatmap resolution.

Value

A named list with values and stats calculated.