Create boxplot of assay, rowData or colData.

This methods visualizes abundances or variables from rowData or colData.

plotBoxplot(object, ...)

# S4 method for class 'SummarizedExperiment'
plotBoxplot(
  object,
  assay.type = NULL,
  row.var = NULL,
  col.var = NULL,
  x = NULL,
  features = NULL,
  group.by = NULL,
  ...
)

Arguments

object

a SummarizedExperiment object.

...

Additional parameters for plotting.

point.offset: Character scalar. Utilized method for offsetting points. The available options include: "center", "compactswarm", "hex", "square", "swarm" (see beeswarm::beeswarm() for details), "frowney", "maxout", "minout", "pseudorandom", "quasirandom", "smiley", "tukey", "tukeyDense" (see vipor::offsetSingleGroup() for details), "jitter", and "none", If "none", ofsetting is not applied. (Default: "jitter")
colour.by: NULL or character scalar. Specifies a variable from colData(x) or rowData(x) which is used to colour observations. (Default: NULL)
fill.by: NULL or character scalar. Specifies a variable from colData(x) or rowData(x) which is used to colour observations. (Default: NULL)
size.by: NULL or character scalar. Specifies a variable from colData(x) or rowData(x) which is used to scale observation points. (Default: NULL)
shape.by: NULL or character scalar. Specifies a variable from colData(x) or rowData(x) which is used to shape observation points. (Default: NULL)
facet.by: NULL or character scalar. Specifies a variable from colData(x) or rowData(x) which is used to facet or group observations. (Default: NULL)
pair.by: NULL or character scalar. Specifies a variable from colData(x) which is used to pair observation points. (Default: NULL)
add.chance: Logical scalar. Whether to visualize chance of paired observations by the color of line. (Default: FALSE)
add.box: Logical scalar. Whether to add a boxplot layout. (Default: TRUE)
add.points: Logical scalar. Whether to add a point layout. (Default: TRUE)
add.proportion: Logical scalar. Whether to add a barplot layout denoting the proportion of observations above threshold. (Default: FALSE)
add.threshold: Logical scalar. Whether to add a threshold as horizontal line when add.proportion = TRUE is specified. (Default: TRUE)
threshold: Numeric scalar. Specifies threshold for the barplots. (Default: 0)
jitter.width: Numeric scalar. Width of jitter. (Default: 0.3)
jitter.height: Numeric scalar. Height of jitter. (Default: 0)
dodge.width: Numeric scalar. Width of dodge. How far apart the groups are plotted? (Default: 0)
beeswarm.corral: Character scalar. Beeswarm's "corral" method. Fed to function beeswarm::beeswarm(). (Default: "none")
scales: Character scalar. Adjust scales of facets. (Default: "fixed")
box.alpha: Numeric scalar. Transparency of the boxplot layer. (Default: 0.5)
point.alpha: Numeric scalar. Transparency of the point layer. (Default: 0.65)
line.alpha: Numeric scalar. Transparency of the line layer. (Default: 0.5)
point.shape: Numeric scalar. Shape of points. (Default: 21)
point.size: Numeric scalar. Size of points. (Default: 2)
point.colour: Character scalar. Colour of points. (Default: "grey70")
linetype: Numeric scalar. Type of lines. (Default: 1)
linewidth: Numeric scalar. Width of lines. (Default: 1)
line.colour: Character scalar. Colour of lines. (Default: "grey70")
box.width: Numeric scalar. Width of boxes. (Default: 0.75)
bar.width: Numeric scalar. Width of proportion bars. By default, it is calculated based so that the width matches with the width of boxes.

assay.type

NULL or character scalar. Specifies the abundace table to plot. (Default: NULL)

row.var

NULL or character scalar. Specifies a variable from rowData(x) to visualize. (Default: NULL)

col.var

NULL or character scalar Specifies a variable from colData(x) to visualize. (Default: NULL)

x

NULL or character vector. Specifies a variable from colData(x) or rowData(x) to visualize in x axis. (Default: NULL)

features

NULL or character vector. If assay.type is specified, this specifies rows to visualize in different facets. If NULL, whole data is visualized as a whole. (Default: NULL)

group.by

NULL or character vector. Specifies a variable from colData(x) or rowData(x) to group observations. (Default: NULL)

Value

A ggplot2 object.

Details

A box plot is standard visualization technique to compare numeric values, such as abundance, between categorical values, such as sample groups. plotBoxplot() streamlines creation of box plots, and it offers multiple options for visualization.

Examples

data("Tito2024QMP")
tse <- Tito2024QMP

tse <- transformAssay(tse, method = "relabundance")
tse <- addAlpha(tse, index = "shannon")

# Visualize alpha diversity
plotBoxplot(tse, col.var = "shannon", x = "diagnosis")


# Visualize relative abundance of top features
tse <- tse[getTop(tse, 6), ]

plotBoxplot(
    tse, assay.type = "relabundance",
    x = "diagnosis", fill.by = "diagnosis",
    features = rownames(tse), facet.by = "rownames"
)


# Add proportion bar
plotBoxplot(
    tse, assay.type = "relabundance",
    x = "diagnosis", fill.by = "diagnosis",
    features = rownames(tse), facet.by = "rownames",
    add.proportion = TRUE, threshold = 0.1
)


# Visualize only with beeswarm
plotBoxplot(
    tse, assay.type = "relabundance",
    x = "diagnosis", group.by = "diagnosis",
    colour.by = "colonoscopy",
    features = rownames(tse), facet.by = "rownames",
    point.offset = "swarm", add.box = FALSE
)


# Do not add points
plotBoxplot(
    tse, assay.type = "relabundance",
    fill.by = "diagnosis",
    features = rownames(tse), facet.by = "rownames",
    add.points = FALSE
)


if (FALSE) { # \dontrun{
library(microbiomeDataSets)

mae <- microbiomeDataSets::peerj32()
tse <- getWithColData(mae, 1)
tse[["time_point"]] <- as.character(tse[["time"]])
# Create a plot showing chance between time points in abundance of
# Akkermansia
plotBoxplot(
    tse, x = "time_point", assay.type = "counts", fill.by = "group",
    features = "Akkermansia", pair.by = "subject",
    add.chance = TRUE, scales = "free"
)
} # }

Create boxplot of `assay`, `rowData` or `colData`.

Arguments

Value

Details

See also

Examples