uso di scale_x_discrete in R ggplot2

Question

ho un problema utilizzando la scala discreta in ggplot2 in R. L'uso di

g + scale_x_discrete(breaks=1:7, labels=1:7) 

modifica non correttamente in limiti di una trama.

Prima:

Dopo:

non riesco a vedere nulla di sospetto circa il codice che uso per produrre l'immagine, ma qui è:

g <- ggplot(data=plottingData, aes(x=x, y=y, ymin=ymin, ymax=ymax)) + 
geom_bar(stat="identity", fill=col) + 
geom_errorbar(width=0.5*binwidth, size=0.3) 

Ed ecco lo dput() dell'oggetto ggplot2 risultante:

structure(list(data = structure(list(x = c(1, 2, 3, 4, 5, 6, 7), y = c(0.689655172413793, 0.689655172413793, 11.0344827586207, 2.75862068965517, 70.3448275862069, 13.7931034482759, 0.689655172413793), ymin = c(0, 0, 6.84765916431683, 0.870298113507349, 62.426550974053, 9.06894448064895, 0), ymax = c(4.26873021234759, 4.26873021234759, 17.3134146611865, 7.18339316166044, 77.1707644621886, 20.4612568616329, 4.26873021234759)), .Names = c("x", "y", "ymin", "ymax"), row.names = c(NA, -7L), class = "data.frame"), layers = list(<environment>, <environment>),  scales = <S4 object of class structure("Scales", package = "ggplot2")>,  mapping = structure(list(x = x, y = y, ymin = ymin, ymax = ymax), .Names = c("x",  "y", "ymin", "ymax"), class = "uneval"), theme = structure(list(  line = structure(list(colour = "black", size = 0.5, linetype = 1,    lineend = "butt"), .Names = c("colour", "size", "linetype",   "lineend"), class = c("element_line", "element")), rect = structure(list(   fill = "white", colour = "black", size = 0.5, linetype = 1), .Names = c("fill",   "colour", "size", "linetype"), class = c("element_rect",   "element")), text = structure(list(family = "", face = "plain",    colour = "black", size = 12, hjust = 0.5, vjust = 0.5,    angle = 0, lineheight = 0.9), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   axis.text = structure(list(family = NULL, face = NULL,    colour = NULL, size = structure(0.8, class = "rel"),    hjust = NULL, vjust = NULL, angle = NULL, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   strip.text = structure(list(family = NULL, face = NULL,    colour = NULL, size = structure(0.8, class = "rel"),    hjust = NULL, vjust = NULL, angle = NULL, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   axis.line = structure(list(), class = c("element_blank",   "element")), axis.text.x = structure(list(family = NULL,    face = NULL, colour = NULL, size = NULL, hjust = NULL,    vjust = 1, angle = NULL, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   axis.text.y = structure(list(family = NULL, face = NULL,    colour = NULL, size = NULL, hjust = 1, vjust = NULL,    angle = NULL, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   axis.ticks = structure(list(colour = "black", size = NULL,    linetype = NULL, lineend = NULL), .Names = c("colour",   "size", "linetype", "lineend"), class = c("element_line",   "element")), axis.title.x = structure(list(family = NULL,    face = NULL, colour = NULL, size = NULL, hjust = NULL,    vjust = NULL, angle = NULL, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   axis.title.y = structure(list(family = NULL, face = NULL,    colour = NULL, size = NULL, hjust = NULL, vjust = NULL,    angle = 90, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   axis.ticks.length = structure(0.15, unit = "cm", valid.unit = 1L, class = "unit"),   axis.ticks.margin = structure(0.1, unit = "cm", valid.unit = 1L, class = "unit"),   legend.background = structure(list(fill = NULL, colour = NA,    size = NULL, linetype = NULL), .Names = c("fill",   "colour", "size", "linetype"), class = c("element_rect",   "element")), legend.margin = structure(0.2, unit = "cm", valid.unit = 1L, class = "unit"),   legend.key = structure(list(fill = NULL, colour = "grey80",    size = NULL, linetype = NULL), .Names = c("fill",   "colour", "size", "linetype"), class = c("element_rect",   "element")), legend.key.size = structure(1.2, unit = "lines", valid.unit = 3L, class = "unit"),   legend.key.height = NULL, legend.key.width = NULL, legend.text = structure(list(   family = NULL, face = NULL, colour = NULL, size = structure(0.8, class = "rel"),    hjust = NULL, vjust = NULL, angle = NULL, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   legend.text.align = NULL, legend.title = structure(list(   family = NULL, face = "bold", colour = NULL, size = structure(0.8, class = "rel"),    hjust = 0, vjust = NULL, angle = NULL, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   legend.title.align = NULL, legend.position = "right",   legend.direction = NULL, legend.justification = "center",   legend.box = NULL, panel.background = structure(list(   fill = "white", colour = NA, size = NULL, linetype = NULL), .Names = c("fill",   "colour", "size", "linetype"), class = c("element_rect",   "element")), panel.border = structure(list(fill = NA,    colour = "grey50", size = NULL, linetype = NULL), .Names = c("fill",   "colour", "size", "linetype"), class = c("element_rect",   "element")), panel.grid.major = structure(list(colour = "grey90",    size = 0.2, linetype = NULL, lineend = NULL), .Names = c("colour",   "size", "linetype", "lineend"), class = c("element_line",   "element")), panel.grid.minor = structure(list(colour = "grey98",    size = 0.5, linetype = NULL, lineend = NULL), .Names = c("colour",   "size", "linetype", "lineend"), class = c("element_line",   "element")), panel.margin = structure(0.25, unit = "lines", valid.unit = 3L, class = "unit"),   panel.margin.x = NULL, panel.margin.y = NULL, strip.background = structure(list(   fill = "grey80", colour = "grey50", size = 0.2, linetype = NULL), .Names = c("fill",   "colour", "size", "linetype"), class = c("element_rect",   "element")), strip.text.x = structure(list(family = NULL,    face = NULL, colour = NULL, size = NULL, hjust = NULL,    vjust = NULL, angle = NULL, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   strip.text.y = structure(list(family = NULL, face = NULL,    colour = NULL, size = NULL, hjust = NULL, vjust = NULL,    angle = -90, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   plot.background = structure(list(fill = NULL, colour = "white",    size = NULL, linetype = NULL), .Names = c("fill",   "colour", "size", "linetype"), class = c("element_rect",   "element")), plot.title = structure(list(family = NULL,    face = NULL, colour = NULL, size = structure(1.2, class = "rel"),    hjust = NULL, vjust = NULL, angle = NULL, lineheight = NULL), .Names = c("family",   "face", "colour", "size", "hjust", "vjust", "angle",   "lineheight"), class = c("element_text", "element")),   plot.margin = structure(c(1, 1, 0.5, 0.5), unit = "lines", valid.unit = 3L, class = "unit")), .Names = c("line",  "rect", "text", "axis.text", "strip.text", "axis.line", "axis.text.x",  "axis.text.y", "axis.ticks", "axis.title.x", "axis.title.y",  "axis.ticks.length", "axis.ticks.margin", "legend.background",  "legend.margin", "legend.key", "legend.key.size", "legend.key.height",  "legend.key.width", "legend.text", "legend.text.align", "legend.title",  "legend.title.align", "legend.position", "legend.direction",  "legend.justification", "legend.box", "panel.background",  "panel.border", "panel.grid.major", "panel.grid.minor", "panel.margin",  "panel.margin.x", "panel.margin.y", "strip.background", "strip.text.x",  "strip.text.y", "plot.background", "plot.title", "plot.margin" ), class = c("theme", "gg"), complete = TRUE), coordinates = structure(list(  limits = structure(list(x = NULL, y = NULL), .Names = c("x",   "y"))), .Names = "limits", class = c("cartesian", "coord" )), facet = structure(list(shrink = TRUE), .Names = "shrink", class = c("null",  "facet")), plot_env = <environment>, labels = structure(list(  x = "x", y = "y", ymin = "ymin", ymax = "ymax"), .Names = c("x",  "y", "ymin", "ymax"))), .Names = c("data", "layers", "scales", "mapping", "theme", "coordinates", "facet", "plot_env", "labels"), class = c("gg", "ggplot")) 

In particolare, il parametro di ampliare regola solo le trame un po 'e expand=c(0,0) non risolve il problema. La specifica dei limiti risolve il problema, ma rimuove anche le etichette degli assi per qualche motivo.

Qualsiasi aiuto sarebbe apprezzato.

Answer 1

Ciò probabilmente accade già quando si aggiunge g + scale_x_discrete(). Questo accade quando si utilizza una scala discreta per dati continui. Senza le interruzioni, puoi vedere i limiti sbagliati e cambiarli semplicemente.

g + scale_x_discrete() 
g + scale_x_discrete(limits=1:7) 
g + scale_x_discrete(limits=1:7, labels = letters[1:7]) 

In alternativa, è possibile utilizzare factor per ottenere i giusti limiti fin dall'inizio. Ovviamente dovrai rinominare l'asse.

ggplot(data=plottingData, aes(x=factor(x), y=y, ymin=ymin, ymax=ymax)) + 
    geom_bar(stat="identity", fill=col) + 
    geom_errorbar(width=0.5*binwidth, size=0.3) + 
    scale_x_discrete(name = 'x')