Limit ggplot2 x axis size in R

Question

I'm trying to limit my ggplot output to only the range of interest and exclude the extraneous grey margin on either side of the heatmap. What argument should I add to my function?

heatmap <- function(df, .x_var, .y_var, .z_var) {

  x_var <- sym(.x_var)
  y_var <- sym(.y_var)
  z_var <- sym(.z_var)

  ggplot(df, aes(x = !! x_var, y = !! y_var, fill = !! z_var)) + 
    geom_tile(colour = "black") +
    scale_x_discrete(limits = c(2008:2018)) +
    theme(axis.text.y = element_text(size = 6))
}

Duplicate: [How to remove space between axis & area-plot in ggplot2?](https://stackoverflow.com/questions/22945651/how-to-remove-space-between-axis-area-plot-in-ggplot2) — tjebo, Jan 22 '20 at 17:09

score 5 · Accepted Answer · answered Jan 22 '20 at 16:00

5

Adding scale_x_discrete(expand = c(0,0)) to the plot should do the trick.

answered Jan 22 '20 at 16:00

Jonathan V. Solórzano

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score 0 · Answer 2 · answered Jan 22 '20 at 16:07

Inserted Jonathan's expand = c(0,0) option into scale_x_discrete

  heatmap <- function(df, .x_var, .y_var, .z_var) {

      x_var <- sym(.x_var)
      y_var <- sym(.y_var)
      z_var <- sym(.z_var)

  ggplot(df, aes(x = !! x_var, y = !! y_var, fill = !! z_var)) + 
    geom_tile(colour = "black") +
    scale_x_discrete(limits = c(2008:2018), expand = c(0,0)) +
    theme(axis.text.y = element_text(size = 6))
}

Limit ggplot2 x axis size in R

2 Answers2