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HeatmapR 1.1.0

New Features

• Added support for cosine distance metric in hierarchical clustering via dist = "cosine" parameter in heat_map_clust() and heat_map().
  • When using cosine distance, tree_cut values between 0 and 1 are interpreted as absolute cosine distance thresholds rather than proportional tree heights. This allows for more intuitive clustering based on actual cosine distance values.
  • Non-cosine distance metrics retain the original proportional height behavior.
• Added manual cluster split functionality - clusters can now be manually defined by:
  • Specifying the number of columns/rows in each cluster (e.g., tree_cut_x = c(3,4,5))
  • Supplying a vector of cluster indices to assign each column/row to a specific cluster (e.g., tree_cut_x = c(1,1,1,2,2,2,2,3,3,3))
• Enhanced dendrogram rendering to support manual splits while preserving the option to display dendrograms with manually defined clusters.
• Added cell_border_mask parameter to selectively apply colored borders to specific cells. Accepts a logical matrix of the same dimensions as the input data, where TRUE indicates a cell should have a colored border and FALSE indicates a transparent border.
• Added cell_col_scale_limits parameter to set custom limits for colour scales, enabling consistent colour scales across multiple heatmaps (e.g., cell_col_scale_limits = c(0, 100)).
• Added cell_size_scale_limits parameter to set custom limits for size scales when using cell_size = TRUE, ensuring consistent size scaling across multiple plots.

Improvements

• Improved internal distance calculation with optimized cosine distance computation.
• Better handling of zero-length vectors in distance calculations.
• Scale limits (colour and size) are now computed from unrounded data before any rounding occurs, preventing empty legends when all values round to the same value.
• Colour and size assignments now use unrounded values for accuracy, while rounding only affects displayed cell text. This preserves visual distinctions even when rounded text appears identical.

HeatmapR 1.0.0

• Create HeatmapR to easily construct high resolution complex heatmaps using base graphics.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.