Changes in version 1.21.3                        

    o   set limit for smoothing.

                       Changes in version 1.21.1                        

    o   if the matrix is non-negative, after smoothing, negative values are reset to zero.

                       Changes in version 1.13.1                        

    o   update the package according to the new version of ComplexHeatmap (>= 1.99.0)

    o   removed `EnrichedHeatmap` class and now the enriched heatmap is purely a `Heatmap` class object.

    o   add `flip_upstream` argument in `normalizeToMatrix()`.

    o   `pos_line` and `pos_line_gp` use the setting in `EnrichedHeatmap()` by default.

    o   `colSds` -> `matrixStats::colSds`

                       Changes in version 1.11.1                        

    o   add `as.normalizedMatrix()` function to convert a matrix to `normalizedMatrix` class

                        Changes in version 1.9.3                        

    o   support visualize category signals

    o   add `discretize()` to transform continuous matrices to discrete matrices

    o   add one more vignette showing the usage of categorical signals 

                        Changes in version 1.9.2                        

    o   improvement on vignettes

    o   enriched_scores() directly applied to the normalized matrix

    o   row dendrogram is reordered by enriched scores if cluster_row is set to TRUE

                        Changes in version 1.7.1                        

    o   show_row_names is put in the function argument list

    o   we don't use a position with 0 (either +1 or -1)

    o   add `dist_by_closeness()`

    o   add `extract_anno_enriched()`

    o   add ticks on axes

    o   add a new vignette (compare row ordering methods)

                        Changes in version 1.5.1                        

    o   anno_enriched(): can visualize positive signals and negative signals separatedly

    o   add rbind.normalizedMatrix function

                        Changes in version 1.3.5                        

    o   anno_enriched(): add `abs_mean` and `abs_sum` for `value` argument

                        Changes in version 1.3.4                        

    o   add a new section in the vignette ("Use your own matrix")

    o   standard error is used instead of standard deviation for the annotation
	chagnes in version 1.3.2

    o   makeMatrix(): consider when no target is overlaped to any signal.

                        Changes in version 1.1.8                        

    o   bug fixed that when there is no column name in a normal heatmap, axis is hidden.

                        Changes in version 1.1.7                        

    o   add legends by Legend() function in the vignette

                        Changes in version 1.1.5                        

    o   `normalizeToMatrix`: modified default of `trim` to 0

    o   `makeMatrix`: w0 mode can deal with overlapping signals

                        Changes in version 1.1.4                        

    o   the color of error areas is set 25% light of the color of corresponding line.

    o   support raster image for heatmap body

                        Changes in version 1.1.3                        

    o   parameter name was wrong when constructin `ht@layout$graphic_fun_list`

    o   add `row_order` option in `EnrichedHeatmap()`

    o   `normalizeToMatrix()` supports self-defined smoothing function

    o   there can be no upstream or/and downstream in the heatmap

    o   smoothing function can be self-defined

                        Changes in version 1.1.2                        

    o   `normalizeToMatrix()`: more options can be passed to `locfit::locfit()`

    o   `anno_enrich()`: exclude NA values

                        Changes in version 1.1.1                        

    o   add `getSignalsFromList()` which summarize signals from a list
	of matrix

    o   export `copyAttr()`

                       Changes in version 0.99.3                        

    o   `anno_enrich`: get rid of lazy loading

    o   smoothing by locfit

                       Changes in version 0.99.2                        

    o   NULL can be added to the heatmap list

                       Changes in version 0.99.1                        

    o   correctly use `system.file()` now

                       Changes in version 0.99.0                        

    o   first release