Change X-Axis Breaks Ggplot2

Change x-axis breaks ggplot2

This code should work,

grp = ggplot(df,aes(x=year,y=anom)) +
      geom_smooth() +
      labs(title="Precipitaion", y="Anomaly", x = "")
grp + scale_x_continuous(breaks=seq(1930, 1940, 1))

also the syntax for seq is seq(start,end,step-by).

How to master x-axis breaks in ggplot?

There is a layer scale_x_date with arguments date_breaks and date_labels can can take care of the axis labels positioning and formatting automatically.

library(dplyr)
library(tidyr)
library(ggplot2)

ol <- Sys.getlocale("LC_TIME")
Sys.setlocale("LC_TIME", "de_DE.UTF-8")

testData %>%
  mutate(iso_week = paste(iso_week, "1"),
         iso_week = as.Date(iso_week, format = "%Y_KW_%U %u")) %>%
  pivot_longer(-iso_week) %>% 
  ggplot(aes(x = iso_week, y = value, fill = name)) + 
  geom_bar(stat = 'identity') +
  scale_x_date(date_breaks = "2 weeks", date_labels = "%Y-%U")  +
  theme_bw() + 
  theme(panel.border = element_blank(),
        axis.text.x = element_text(angle = 60, vjust = 1, hjust = 1))

Reset my locale.

Sys.setlocale(ol)

How to change distance between breaks for continuous x-axis on ggplot?

Here's an example with the built in economics dataset. You can see that you can specify the breaks however you want as per usual, but the "sqrt" transformation shifts the actual plotted values to have more space near the beginning of the series. You can use other built in transformations or define your own as well.

EDIT: updated with example data and some comparison of common different trans options.

library(tidyverse)
tbl <- structure(list(yval = c(742, 494, 919, 625, 124, 788, 583, 213, 715, 363, 15, 313, 472, 559, 314, 494, 388, 735, 242, 153, 884, 504, 267, 454, 325, 305, 746, 628, 549, 345, 327, 230, 271, 486, 971, 979, 857, 779, 394, 903, 585, 238, 702, 850, 611, 710, 694, 674, 1133, 468, 784, 634, 234, 61, 325, 505, 693, 1019, 766, 435, 407, 772, 925, 877, 187, 290, 782, 674, 1263, 1156, 935, 499, 791, 797, 537, 308, 761, 744, 674, 764, 560, 805, 540, 427, 711), xval = c(80, 350, 750, 100, 20, 200, 350, 50, 110, 20, 200, 350, 60, 100, 20, 40, 60, 100, 20, 40, 350, 50, 20, 40, 50, 30, 40, 260, 1000, 200, 200, 200, 500, 50, 350, 360, 380, 250, 60, 190, 40, 70, 70, 40, 40, 70, 180, 180, 440, 370, 130, 1200, 20, 20, 30, 80, 120, 200, 220, 120, 40, 80, 350, 750, 20, 80, 200, 320, 500, 220, 160, 80, 140, 350, 100, 40, 350, 100, 200, 340, 60, 40, 100, 60, 40)), .Names = c("yval", "xval"), row.names = c(NA, -85L), class = c("tbl_df", "tbl", "data.frame"))

ggplot(tbl) +
  geom_line(aes(x = xval, y = yval)) +
  scale_x_continuous(trans = "sqrt", breaks = c(0,50,100,150,250,350,450,500,1200))

ggplot(tbl) +
  geom_line(aes(x = xval, y = yval)) +
  scale_x_continuous(trans = "log10", breaks = c(0,50,100,150,250,350,450,500,1200))

Created on 2018-04-27 by the reprex package (v0.2.0).

Set breaks between values in continuous axis of ggplot

From the ?scale_x_continuous help page, breaks can be (among other options)

A function that takes the limits as input and returns breaks as output

The scales package offers breaks_width() for exactly this purpose:

ggplot(mpg, aes(displ, hwy)) +
  geom_point() + 
  scale_x_continuous(breaks = scales::breaks_width(2))

Here's an anonymous function going from the (floored) min to the (ceilinged) max by 2:

ggplot(mpg, aes(displ, hwy)) +
  geom_point() + 
  scale_x_continuous(breaks = \(x) seq(floor(x[1]), ceiling(x[2]), by = 2))

Alternately you could still use seq for finer control, more customizable, less generalizable:

ggplot(mpg, aes(displ, hwy)) +
  geom_point() + 
  scale_x_continuous(breaks = seq(2, 6, by = 2))

Add breaks to square root transformed x-axis ggplot2

You need to add limits to cover the values in the lower bins:

library(ggplot2)

ggplot(dat, aes(x = x)) + 
  geom_histogram(position = "dodge",
                 bins = 7,
                 fill = NA,
                 col = "black",
                 size = 1) +
  scale_x_sqrt(breaks = c(50, 100, 1000, 5000, 10000, 15000),
               limits = c(0, 20000)) +
  theme_classic()

Setting y axis breaks in ggplot

You need to add

+ scale_y_continuous(breaks = seq(0, 100, by = 20))

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EDIT: Per comment below, this only works if axis already in the appropriate range. To enforce the range you can extend above code as follows:

+ scale_y_continuous(limits = c(0, 100), breaks = seq(0, 100, by = 20))

How to reverse order of x-axis breaks in ggplot?

This is exactly what scale_x_reverse is for:

ggplot(test2, aes(Freq, SD, z = Intro_0)) +
  geom_contour_filled(bins = 9)+
  scale_fill_brewer(palette = "BuPu")+
  labs(x = "Frequency", y = "Magnitude", title = "Test Plot", fill = "Legend") +
  scale_x_reverse(breaks = c(1, 2, 3, 5, 10, 15, 20), 
                  labels = c("Freq = 1/1", "", "", "", "", "", "Freq = 1/20")) +
  theme_bw()+
  theme(panel.border = element_blank(), 
        panel.grid.major = element_blank(), 
        panel.grid.minor = element_blank(), 
        axis.line = element_line(colour = "white"),
        axis.text.x = element_text(angle = 45, hjust=1), 
        plot.caption.position = "plot", 
        plot.caption = element_text(hjust = 0)) 

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