position_stacknudge {ggpp}

Combined positions stack and nudge

Description

position_stacknudge() is useful when labelling plots such as stacked bars, stacked columns, stacked lines, etc. In contrast to position_nudge, position_stacknudge() returns in data both the original coordinates and the nudged coordinates.

Usage

position_stacknudge(
  vjust = 1,
  reverse = FALSE,
  x = 0,
  y = 0,
  direction = c("none", "split", "split.x", "split.y"),
  kept.origin = c("stacked", "original", "none")
)

position_fillnudge(
  vjust = 1,
  reverse = FALSE,
  x = 0,
  y = 0,
  direction = c("none", "split", "split.x", "split.y"),
  kept.origin = c("stacked", "original", "none")
)

position_stack_keep(vjust = 1, reverse = FALSE, kept.origin = "original")

position_fill_keep(vjust = 1, reverse = FALSE, kept.origin = "original")

position_stack_minmax(
  vjust = 1,
  reverse = FALSE,
  x = 0,
  y = 0,
  direction = c("none", "split", "split.x", "split.y"),
  kept.origin = c("stacked", "original", "none")
)

Arguments

vjust

Vertical adjustment for geoms that have a position (like points or lines), not a dimension (like bars or areas). Set to 0 to align with the bottom, 0.5 for the middle, and 1 (the default) for the top.

reverse

If TRUE, will reverse the default stacking order. This is useful if you're rotating both the plot and legend.

x, y

Amount of vertical and horizontal distance to move. A numeric vector of length 1, or of the same length as rows there are in data, with nudge values in data rows order.

direction

One of "none", "split", "split.x" or "split.y". A value of "none" replicates the behavior of position_nudge. At the moment "split" changes the sign of the nudge at zero, which is suitable for column plots with negative slices.

kept.origin

One of "original", "stacked" or "none".

Details

position_fillnudge() is useful when labelling plots such as filled bars, filled columns, filled lines, etc. In contrast to position_nudge, position_fillnudge() returns in data both the original coordinates and the nudged coordinates.

The wrapper position_nudge_keep() has the same signature and behaviour as position_nudge nad provides an easier to remember name when the need is only to have access to both the original and nudged coordinates.

These position functions are backwards compatible with position_nudge but extends it by adding support for stacking and for geometries that make use of the original position to draw connecting segments or arrows.

The wrapper position_stack_keep() has the same signature and behaviour as position_stack and provides an easier to remember name when the need is only to have access to both the original and nudged coordinates.

The wrapper position_fill_keep() has the same signature and behaviour as position_fill and provides an easier to remember name when the need is only to have access to both the original and nudged coordinates.

The wrapper position_stack_minmax() has the same signature and behaviour as position_stacknudge but stacks y, ymin and ymax in parallel, making it possible to stack summaries with error bars, works correctly with geom_pointrange(), geom_linerange() and geom_errorbar().

Value

A "Position" object.

Author(s)

Michał Krassowski, edited by Pedro J. Aphalo.

Source

https://github.com/slowkow/ggrepel/issues/161.

See Also

position_nudge, position_stack, position_nudge_repel.

Other position adjustments: position_dodgenudge(), position_jitternudge(), position_nudge_center(), position_nudge_keep(), position_nudge_line(), position_nudge_to()

Examples

df <- data.frame(x1 = c("a", "a", "b", "b", "b"),
                 x2 = c(1, 2, 1, 3, -1),
                 grp = c("some long name", "other name", "some name",
                         "another name", "some long name"))

# Add labels to a horizontal column plot (stacked by default)
ggplot(data = df, aes(x1, x2, group = grp)) +
  geom_col(aes(fill = grp), width=0.5) +
  geom_vline(xintercept = 0) +
  geom_text(
    aes(label = grp),
    position = position_stacknudge(vjust = 0.5, y = 0.3)) +
  theme(legend.position = "none")

# Add labels to a vertical column plot (stacked by default)
ggplot(data = df, aes(x2, x1, group = grp)) +
  geom_col(aes(fill = grp), width=0.5) +
  geom_vline(xintercept = 0) +
  geom_text(
    aes(label = grp),
    position = position_stacknudge(vjust = 0.5, x = -0.3),
    angle = 90) +
  theme(legend.position = "none")

# Add labels to a vertical column plot (stacked by default)
ggplot(data = subset(df, x1 >= 0), aes(x1, x2, group = grp)) +
  geom_col(aes(fill = grp), width=0.5, position = position_fill()) +
  geom_vline(xintercept = 0) +
  geom_text(
    aes(label = grp),
    position = position_fillnudge(vjust = 0.5, x = -0.3),
    angle = 90) +
  theme(legend.position = "none")

# Add label at a fixed distance from the top of each column slice
ggplot(data = df, aes(x1, x2, group = grp)) +
  geom_col(aes(fill = grp), width=0.5) +
  geom_vline(xintercept = 0) +
  geom_text(
    aes(label = grp),
    position = position_stacknudge(vjust = 1, y = -0.2)) +
  theme(legend.position = "none")

# Use geom_text_s(), geom_text_repel() or geom_label_repel() to link
# label to labelled segment or object with an arrow
ggplot(data = df, aes(x2, x1, group = grp)) +
  geom_col(aes(fill = grp), width=0.5) +
  geom_vline(xintercept = 0) +
  geom_text_s(
    aes(label = grp),
    position = position_stacknudge(vjust = 0.5, y = 0.35),
    vjust = "bottom") +
  theme(legend.position = "none")

ggplot(birch_dw.df,
       aes(y = dry.weight * 1e-3, x = Density, fill = Part)) +
   stat_summary(geom = "col", fun = mean,
                position = "stack", alpha = 0.7, width = 0.67) +
   stat_summary(geom = "linerange", fun.data = mean_cl_normal,
                position = position_stack_minmax()) +
  labs(y = "Seedling dry mass (g)") +
  scale_fill_grey(start = 0.7, end = 0.3) +
  facet_wrap(facets = vars(Container))