FeatureHeatmap
Usage
FeatureHeatmap(
srt,
features = NULL,
cells = NULL,
group.by = NULL,
split.by = NULL,
within_groups = FALSE,
max_cells = 100,
cell_order = NULL,
border = TRUE,
flip = FALSE,
layer = "counts",
assay = NULL,
exp_method = c("zscore", "raw", "fc", "log2fc", "log1p"),
exp_legend_title = NULL,
limits = NULL,
lib_normalize = identical(layer, "counts"),
libsize = NULL,
feature_split = NULL,
feature_split_by = NULL,
n_split = NULL,
split_order = NULL,
split_method = c("kmeans", "hclust", "mfuzz"),
decreasing = FALSE,
fuzzification = NULL,
cluster_features_by = NULL,
cluster_rows = FALSE,
cluster_columns = FALSE,
cluster_row_slices = FALSE,
cluster_column_slices = FALSE,
show_row_names = FALSE,
show_column_names = FALSE,
row_names_side = ifelse(flip, "left", "right"),
column_names_side = ifelse(flip, "bottom", "top"),
row_names_rot = 0,
column_names_rot = 90,
row_title = NULL,
column_title = NULL,
row_title_side = "left",
column_title_side = "top",
row_title_rot = 0,
column_title_rot = ifelse(flip, 90, 0),
anno_terms = FALSE,
anno_keys = FALSE,
anno_features = FALSE,
terms_width = grid::unit(4, "in"),
terms_fontsize = 8,
keys_width = grid::unit(2, "in"),
keys_fontsize = c(6, 10),
features_width = grid::unit(2, "in"),
features_fontsize = c(6, 10),
IDtype = "symbol",
species = "Homo_sapiens",
db_update = FALSE,
db_version = "latest",
db_combine = FALSE,
convert_species = FALSE,
Ensembl_version = 103,
mirror = NULL,
db = "GO_BP",
TERM2GENE = NULL,
TERM2NAME = NULL,
minGSSize = 10,
maxGSSize = 500,
GO_simplify = FALSE,
GO_simplify_cutoff = "p.adjust < 0.05",
simplify_method = "Wang",
simplify_similarityCutoff = 0.7,
pvalueCutoff = NULL,
padjustCutoff = 0.05,
topTerm = 5,
show_termid = FALSE,
topWord = 20,
words_excluded = NULL,
nlabel = 20,
features_label = NULL,
label_size = 10,
label_color = "black",
heatmap_palette = "RdBu",
heatmap_palcolor = NULL,
group_palette = "Paired",
group_palcolor = NULL,
cell_split_palette = "simspec",
cell_split_palcolor = NULL,
feature_split_palette = "simspec",
feature_split_palcolor = NULL,
cell_annotation = NULL,
cell_annotation_palette = "Paired",
cell_annotation_palcolor = NULL,
cell_annotation_params = if (flip) {
list(width = grid::unit(5, "mm"))
} else {
list(height = grid::unit(5, "mm"))
},
feature_annotation = NULL,
feature_annotation_palette = "Dark2",
feature_annotation_palcolor = NULL,
feature_annotation_params = if (flip) {
list(height = grid::unit(5, "mm"))
} else
{
list(width = grid::unit(5, "mm"))
},
use_raster = NULL,
raster_device = "png",
raster_by_magick = FALSE,
height = NULL,
width = NULL,
units = "inch",
seed = 11,
ht_params = list()
)Arguments
- srt
A Seurat object.
- features
The features to include in the heatmap.
- cells
A character vector specifying the cells to include in the heatmap. Default is NULL.
- group.by
A character vector specifying the groups to group by. Default is NULL.
- split.by
A character vector specifying the variable to split the heatmap by. Default is NULL.
- within_groups
A logical value indicating whether to create separate heatmap scales for each group or within each group. Default is FALSE.
- max_cells
An integer, maximum number of cells to sample per group. Default is 100.
- cell_order
A vector of cell names defining the order of cells. Default is NULL.
- border
A logical value indicating whether to add a border to the heatmap. Default is TRUE.
- flip
A logical value indicating whether to flip the heatmap. Default is FALSE.
- layer
A character vector specifying the layer in the Seurat object to use. Default is "counts".
- assay
A character vector specifying the assay in the Seurat object to use. Default is NULL.
- exp_method
A character vector specifying the method for calculating expression values. Default is "zscore" with options "zscore", "raw", "fc", "log2fc", "log1p".
- exp_legend_title
A character vector specifying the title for the legend of expression value. Default is NULL.
- limits
A two-length numeric vector specifying the limits for the color scale. Default is NULL.
- lib_normalize
A logical value indicating whether to normalize the data by library size.
- libsize
A numeric vector specifying the library size for each cell. Default is NULL.
- feature_split
A factor specifying how to split the features. Default is NULL.
- feature_split_by
A character vector specifying which group.by to use when splitting features (into n_split feature clusters). Default is NULL.
- n_split
An integer specifying the number of feature splits (feature clusters) to create. Default is NULL.
- split_order
A numeric vector specifying the order of splits. Default is NULL.
- split_method
A character vector specifying the method for splitting features. Default is "kmeans" with options "kmeans", "hclust", "mfuzz").
- decreasing
A logical value indicating whether to sort feature splits in decreasing order. Default is FALSE.
- fuzzification
A numeric value specifying the fuzzification coefficient. Default is NULL.
- cluster_features_by
A character vector specifying which group.by to use when clustering features. Default is NULL. By default, this parameter is set to NULL, which means that all groups will be used.
- cluster_rows
A logical value indicating whether to cluster rows in the heatmap. Default is FALSE.
- cluster_columns
A logical value indicating whether to cluster columns in the heatmap. Default is FALSE.
- cluster_row_slices
A logical value indicating whether to cluster row slices in the heatmap. Default is FALSE.
- cluster_column_slices
A logical value indicating whether to cluster column slices in the heatmap. Default is FALSE.
- show_row_names
A logical value indicating whether to show row names in the heatmap. Default is FALSE.
- show_column_names
A logical value indicating whether to show column names in the heatmap. Default is FALSE.
- row_names_side
A character vector specifying the side to place row names.
- column_names_side
A character vector specifying the side to place column names.
- row_names_rot
A numeric value specifying the rotation angle for row names. Default is 0.
- column_names_rot
A numeric value specifying the rotation angle for column names. Default is 90.
- row_title
A character vector specifying the title for rows. Default is NULL.
- column_title
A character vector specifying the title for columns. Default is NULL.
- row_title_side
A character vector specifying the side to place row title. Default is "left".
- column_title_side
A character vector specifying the side to place column title. Default is "top".
- row_title_rot
A numeric value specifying the rotation angle for row title. Default is 0.
- column_title_rot
A numeric value specifying the rotation angle for column title.
- anno_terms
A logical value indicating whether to include term annotations. Default is FALSE.
- anno_keys
A logical value indicating whether to include key annotations. Default is FALSE.
- anno_features
A logical value indicating whether to include feature annotations. Default is FALSE.
- terms_width
A unit specifying the width of term annotations. Default is unit(4, "in").
- terms_fontsize
A numeric vector specifying the font size(s) for term annotations. Default is 8.
- keys_width
A unit specifying the width of key annotations. Default is unit(2, "in").
- keys_fontsize
A two-length numeric vector specifying the minimum and maximum font size(s) for key annotations. Default is c(6, 10).
- features_width
A unit specifying the width of feature annotations. Default is unit(2, "in").
- features_fontsize
A two-length numeric vector specifying the minimum and maximum font size(s) for feature annotations. Default is c(6, 10).
- IDtype
A character vector specifying the type of IDs for features. Default is "symbol".
- species
A character vector specifying the species for features. Default is "Homo_sapiens".
- db_update
A logical value indicating whether to update the database. Default is FALSE.
- db_version
A character vector specifying the version of the database. Default is "latest".
- db_combine
A logical value indicating whether to use a combined database. Default is FALSE.
- convert_species
A logical value indicating whether to use a species-converted database if annotation is missing for
species. Default is FALSE.- Ensembl_version
An integer specifying the Ensembl version. Default is 103.
- mirror
A character vector specifying the mirror for the Ensembl database. Default is NULL.
- db
A character vector specifying the database to use. Default is "GO_BP".
- TERM2GENE
A data.frame specifying the TERM2GENE mapping for the database. Default is NULL.
- TERM2NAME
A data.frame specifying the TERM2NAME mapping for the database. Default is NULL.
- minGSSize
An integer specifying the minimum gene set size for the database. Default is 10.
- maxGSSize
An integer specifying the maximum gene set size for the database. Default is 500.
- GO_simplify
A logical value indicating whether to simplify gene ontology terms. Default is FALSE.
- GO_simplify_cutoff
A character vector specifying the cutoff for GO simplification. Default is "p.adjust < 0.05".
- simplify_method
A character vector specifying the method for GO simplification. Default is "Wang".
- simplify_similarityCutoff
A numeric value specifying the similarity cutoff for GO simplification. Default is 0.7.
- pvalueCutoff
A numeric vector specifying the p-value cutoff(s) for significance. Default is NULL.
- padjustCutoff
A numeric value specifying the adjusted p-value cutoff for significance. Default is 0.05.
- topTerm
An integer specifying the number of top terms to include. Default is 5.
- show_termid
A logical value indicating whether to show term IDs. Default is FALSE.
- topWord
An integer specifying the number of top words to include. Default is 20.
- words_excluded
A character vector specifying the words to exclude. Default is NULL.
- nlabel
An integer specifying the number of labels to include. Default is 0.
- features_label
A character vector specifying the features to label. Default is NULL.
- label_size
A numeric value specifying the size of labels. Default is 10.
- label_color
A character vector specifying the color of labels. Default is "black".
- heatmap_palette
A character vector specifying the palette to use for the heatmap. Default is "RdBu".
- heatmap_palcolor
A character vector specifying the heatmap color to use. Default is NULL.
- group_palette
A character vector specifying the palette to use for groups. Default is "Paired".
- group_palcolor
A character vector specifying the group color to use. Default is NULL.
- cell_split_palette
A character vector specifying the palette to use for cell splits. Default is "simspec".
- cell_split_palcolor
A character vector specifying the cell split color to use. Default is NULL.
- feature_split_palette
A character vector specifying the palette to use for feature splits. Default is "simspec".
- feature_split_palcolor
A character vector specifying the feature split color to use. Default is NULL.
- cell_annotation
A character vector specifying the cell annotation(s) to include. Default is NULL.
- cell_annotation_palette
A character vector specifying the palette to use for cell annotations. The length of the vector should match the number of cell_annotation. Default is "Paired".
- cell_annotation_palcolor
A list of character vector specifying the cell annotation color(s) to use. The length of the list should match the number of cell_annotation. Default is NULL.
- cell_annotation_params
A list specifying additional parameters for cell annotations. Default is a list with width = unit(1, "cm") if flip is TRUE, else a list with height = unit(1, "cm").
- feature_annotation
A character vector specifying the feature annotation(s) to include. Default is NULL.
- feature_annotation_palette
A character vector specifying the palette to use for feature annotations. The length of the vector should match the number of feature_annotation. Default is "Dark2".
- feature_annotation_palcolor
A list of character vector specifying the feature annotation color to use. The length of the list should match the number of feature_annotation. Default is NULL.
- feature_annotation_params
A list specifying additional parameters for feature annotations. Default is an empty list.
- use_raster
A logical value indicating whether to use a raster device for plotting. Default is NULL.
- raster_device
A character vector specifying the raster device to use. Default is "png".
- raster_by_magick
A logical value indicating whether to use the 'magick' package for raster. Default is FALSE.
- height
A numeric vector specifying the height(s) of the heatmap body. Default is NULL.
- width
A numeric vector specifying the width(s) of the heatmap body. Default is NULL.
- units
A character vector specifying the units for the height and width. Default is "inch".
- seed
An integer specifying the random seed. Default is 11.
- ht_params
A list specifying additional parameters passed to the ComplexHeatmap::Heatmap function. Default is an empty list.
Examples
data("pancreas_sub")
# pancreas_sub <- RunDEtest(
# pancreas_sub,
# group_by = "CellType"
# )
de_filter <- dplyr::filter(
pancreas_sub@tools$DEtest_CellType$AllMarkers_wilcox,
p_val_adj < 0.05 & avg_log2FC > 1
)
ht1 <- FeatureHeatmap(
srt = pancreas_sub,
features = de_filter$gene,
group.by = "CellType",
split.by = "Phase",
cell_split_palette = "Dark2"
)
#> 'magick' package is suggested to install to give better rasterization.
#>
#> Set `ht_opt$message = FALSE` to turn off this message.
#> `use_raster` is automatically set to TRUE for a matrix with more than
#> 2000 rows. You can control `use_raster` argument by explicitly setting
#> TRUE/FALSE to it.
#>
#> Set `ht_opt$message = FALSE` to turn off this message.
ht1$plot
panel_fix(
ht1$plot,
height = 4,
width = 6,
raster = TRUE,
dpi = 50
)
ht2 <- FeatureHeatmap(
srt = pancreas_sub,
features = de_filter$gene,
group.by = c("CellType", "SubCellType"),
n_split = 4,
cluster_rows = TRUE,
cluster_row_slices = TRUE,
cluster_columns = TRUE,
cluster_column_slices = TRUE,
ht_params = list(row_gap = grid::unit(0, "mm"))
)
#> 'magick' package is suggested to install to give better rasterization.
#>
#> Set `ht_opt$message = FALSE` to turn off this message.
#> `use_raster` is automatically set to TRUE for a matrix with more than
#> 2000 rows. You can control `use_raster` argument by explicitly setting
#> TRUE/FALSE to it.
#>
#> Set `ht_opt$message = FALSE` to turn off this message.
#> `use_raster` is automatically set to TRUE for a matrix with more than
#> 2000 rows. You can control `use_raster` argument by explicitly setting
#> TRUE/FALSE to it.
#>
#> Set `ht_opt$message = FALSE` to turn off this message.
#> ℹ [2025-07-02 02:29:28] The size of the heatmap is fixed because certain elements are not scalable.
#> ℹ [2025-07-02 02:29:28] The width and height of the heatmap are determined by the size of the current viewport.
#> ℹ [2025-07-02 02:29:28] If you want to have more control over the size, you can manually set the parameters 'width' and 'height'.
ht2$plot
ht3 <- FeatureHeatmap(
srt = pancreas_sub,
features = de_filter$gene,
feature_split = de_filter$group1,
group.by = "CellType",
species = "Mus_musculus",
db = "GO_BP",
anno_terms = TRUE,
anno_keys = TRUE,
anno_features = TRUE
)
#> 'magick' package is suggested to install to give better rasterization.
#>
#> Set `ht_opt$message = FALSE` to turn off this message.
#> ℹ [2025-07-02 02:29:56] Start Enrichment
#> ℹ [2025-07-02 02:29:56] Workers: 2
#> ℹ [2025-07-02 02:29:56] Species: Mus_musculus
#> ℹ [2025-07-02 02:29:57] Loading cached db: GO_BP version:3.21.0 nterm:15445 created:2025-07-02 02:24:50.923715
#> ℹ [2025-07-02 02:29:58] Permform enrichment...
#>
|
| | 0%
|
|============================ | 40%
|
|======================================================================| 100%
#>
#> ℹ [2025-07-02 02:30:47] Enrichment done
#> ℹ [2025-07-02 02:30:47] Elapsed time:50.82 secs
#> `use_raster` is automatically set to TRUE for a matrix with more than
#> 2000 rows. You can control `use_raster` argument by explicitly setting
#> TRUE/FALSE to it.
#>
#> Set `ht_opt$message = FALSE` to turn off this message.
#> ℹ [2025-07-02 02:31:27] The size of the heatmap is fixed because certain elements are not scalable.
#> ℹ [2025-07-02 02:31:27] The width and height of the heatmap are determined by the size of the current viewport.
#> ℹ [2025-07-02 02:31:27] If you want to have more control over the size, you can manually set the parameters 'width' and 'height'.
ht3$plot
pancreas_sub <- AnnotateFeatures(
pancreas_sub,
species = "Mus_musculus",
db = c("TF", "CSPA")
)
#> ℹ [2025-07-02 02:31:37] Species: Mus_musculus
#> ℹ [2025-07-02 02:31:37] Preparing database: TF
#> ! [2025-07-02 02:31:39] Error in utils::download.file(url = url, destfile = destfile, method = method, : cannot open URL 'http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Mus_musculus_TF'
#> ! [2025-07-02 02:31:39] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Mus_musculus_TF
#> ! [2025-07-02 02:31:39] Failed to download using "auto". Retry...
#> ! [2025-07-02 02:31:42] Error in utils::download.file(url = url, destfile = destfile, method = method, : 'wget' call had nonzero exit status
#> ! [2025-07-02 02:31:42] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Mus_musculus_TF
#> ! [2025-07-02 02:31:42] Failed to download using "wget". Retry...
#> ! [2025-07-02 02:32:05] Error in utils::download.file(url = url, destfile = destfile, method = method, : cannot open URL 'http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Mus_musculus_TF'
#> ! [2025-07-02 02:32:05] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Mus_musculus_TF
#> ! [2025-07-02 02:32:05] Failed to download using "libcurl". Retry...
#> ! [2025-07-02 02:32:27] Error in utils::download.file(url = url, destfile = destfile, method = method, : cannot open URL 'http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Mus_musculus_Cof'
#> ! [2025-07-02 02:32:27] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Mus_musculus_Cof
#> ! [2025-07-02 02:32:27] Failed to download using "auto". Retry...
#> ! [2025-07-02 02:32:49] Error in utils::download.file(url = url, destfile = destfile, method = method, : 'wget' call had nonzero exit status
#> ! [2025-07-02 02:32:49] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Mus_musculus_Cof
#> ! [2025-07-02 02:32:49] Failed to download using "wget". Retry...
#> ! [2025-07-02 02:33:11] Error in utils::download.file(url = url, destfile = destfile, method = method, : cannot open URL 'http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Mus_musculus_Cof'
#> ! [2025-07-02 02:33:11] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Mus_musculus_Cof
#> ! [2025-07-02 02:33:11] Failed to download using "libcurl". Retry...
#> ! [2025-07-02 02:33:32] Use the human annotation to create the TF database for Mus_musculus
#> ! [2025-07-02 02:34:00] Error in utils::download.file(url = url, destfile = destfile, method = method, : cannot open URL 'http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Homo_sapiens_TF'
#> ! [2025-07-02 02:34:00] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Homo_sapiens_TF
#> ! [2025-07-02 02:34:00] Failed to download using "auto". Retry...
#> ! [2025-07-02 02:38:39] Error in utils::download.file(url = url, destfile = destfile, method = method, : 'wget' call had nonzero exit status
#> ! [2025-07-02 02:38:39] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Homo_sapiens_TF
#> ! [2025-07-02 02:38:39] Failed to download using "wget". Retry...
#> ! [2025-07-02 02:38:43] Error in utils::download.file(url = url, destfile = destfile, method = method, : cannot open URL 'http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Homo_sapiens_TF'
#> ! [2025-07-02 02:38:43] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/TF_list_final/Homo_sapiens_TF
#> ! [2025-07-02 02:38:43] Failed to download using "libcurl". Retry...
#> ! [2025-07-02 02:39:17] Error in utils::download.file(url = url, destfile = destfile, method = method, : cannot open URL 'http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Homo_sapiens_Cof'
#> ! [2025-07-02 02:39:17] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Homo_sapiens_Cof
#> ! [2025-07-02 02:39:17] Failed to download using "auto". Retry...
#> ! [2025-07-02 02:39:20] Error in utils::download.file(url = url, destfile = destfile, method = method, : 'wget' call had nonzero exit status
#> ! [2025-07-02 02:39:20] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Homo_sapiens_Cof
#> ! [2025-07-02 02:39:20] Failed to download using "wget". Retry...
#> ! [2025-07-02 02:39:42] Error in utils::download.file(url = url, destfile = destfile, method = method, : cannot open URL 'http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Homo_sapiens_Cof'
#> ! [2025-07-02 02:39:42] Cannot download from the url: http://bioinfo.life.hust.edu.cn/AnimalTFDB4/static/download/Cof_list_final/Homo_sapiens_Cof
#> ! [2025-07-02 02:39:42] Failed to download using "libcurl". Retry...
#> Error in data.frame(Term = "TF", symbol = tf[["Symbol"]]): arguments imply differing number of rows: 1, 0
ht4 <- FeatureHeatmap(
srt = pancreas_sub,
features = de_filter$gene,
n_split = 4,
group.by = "CellType",
heatmap_palette = "viridis",
feature_annotation = c("TF", "CSPA"),
feature_annotation_palcolor = list(
c("gold", "steelblue"), c("forestgreen")
),
cell_annotation = c("Phase", "G2M_score"),
cell_annotation_palette = c("Dark2", "Purples")
)
#> Error: feature_annotation: TF,CSPA is not in the meta data of the RNA assay in the Seurat object.
ht4$plot
#> Error: object 'ht4' not found
ht5 <- FeatureHeatmap(
srt = pancreas_sub,
features = de_filter$gene,
n_split = 4,
group.by = "CellType",
heatmap_palette = "viridis",
feature_annotation = c("TF", "CSPA"),
feature_annotation_palcolor = list(
c("gold", "steelblue"), c("forestgreen")
),
cell_annotation = c("Phase", "G2M_score"),
cell_annotation_palette = c("Dark2", "Purples"),
flip = TRUE,
column_title_rot = 45
)
#> Error: feature_annotation: TF,CSPA is not in the meta data of the RNA assay in the Seurat object.
ht5$plot
#> Error: object 'ht5' not found
pancreas_sub <- RunSlingshot(
srt = pancreas_sub,
group.by = "SubCellType",
reduction = "UMAP"
)
#> Warning: No shared levels found between `names(values)` of the manual scale and the
#> data's fill values.
#> Warning: No shared levels found between `names(values)` of the manual scale and the
#> data's fill values.
#> Warning: Removed 9 rows containing missing values or values outside the scale range
#> (`geom_path()`).
#> Warning: Removed 9 rows containing missing values or values outside the scale range
#> (`geom_path()`).
#> Warning: Removed 13 rows containing missing values or values outside the scale range
#> (`geom_path()`).
#> Warning: Removed 13 rows containing missing values or values outside the scale range
#> (`geom_path()`).
ht6 <- FeatureHeatmap(
srt = pancreas_sub,
features = de_filter$gene,
nlabel = 10,
cell_order = names(sort(pancreas_sub$Lineage1)),
cell_annotation = c("SubCellType", "Lineage1"),
cell_annotation_palette = c("Paired", "cividis")
)
#> 'magick' package is suggested to install to give better rasterization.
#>
#> Set `ht_opt$message = FALSE` to turn off this message.
#> `use_raster` is automatically set to TRUE for a matrix with more than
#> 2000 rows. You can control `use_raster` argument by explicitly setting
#> TRUE/FALSE to it.
#>
#> Set `ht_opt$message = FALSE` to turn off this message.
ht6$plot
