R How to Plot Data with Confidence Intervals Using ggplot2 Package (Example Code)

In this article you’ll learn how to plot a data frame with confidence intervals using the ggplot2 package in R programming.

Setting up the Example

set.seed(238764333)               # Construct some random data
df_CI <- data.frame(x_values = 1:25,
                    y_values = runif(25, 1, 2),
                    lower_CI = runif(25, 0, 1),
                    upper_CI = runif(25, 2, 3))
df_CI                             # Show example data in RStudio console
#    x_values y_values   lower_CI upper_CI
# 1         1 1.497724 0.18452314 2.086016
# 2         2 1.205241 0.44810720 2.172153
# 3         3 1.677150 0.01113677 2.755956
# 4         4 1.944724 0.66876006 2.968620
# 5         5 1.210716 0.41809743 2.703515
# 6         6 1.576586 0.13839030 2.716492
# 7         7 1.434327 0.42954432 2.541105
# 8         8 1.329666 0.56201672 2.740719
# 9         9 1.624894 0.94046553 2.725235
# 10       10 1.999992 0.75788611 2.872872
# 11       11 1.076288 0.02126278 2.089156
# 12       12 1.698039 0.66717068 2.301000
# 13       13 1.149957 0.35207286 2.625906
# 14       14 1.212798 0.94494239 2.744084
# 15       15 1.547397 0.61135352 2.491838
# 16       16 1.387348 0.79431157 2.087978
# 17       17 1.279603 0.57946594 2.557548
# 18       18 1.534598 0.27164055 2.717535
# 19       19 1.686022 0.66113979 2.664230
# 20       20 1.677092 0.70238721 2.373479
# 21       21 1.942224 0.06481388 2.217472
# 22       22 1.629116 0.14106900 2.056812
# 23       23 1.413006 0.27121570 2.709895
# 24       24 1.701890 0.77305589 2.447095
# 25       25 1.019012 0.29547495 2.238710
install.packages("ggplot2")       # Install & load ggplot2 package
library("ggplot2")
my_ggplot <- ggplot(df_CI,        # Create default ggplot2 scatterplot
                    aes(x = x_values,
                        y = y_values)) +
  geom_point()
my_ggplot                         # Draw plot in RStudio

r graph figure 1 r data confidence intervals using ggplot2 package

Example: Create ggplot2 Plot with Lower & Upper Confidence Intervals

my_ggplot +                       # Adding confidence intervals to ggplot2 plot
  geom_errorbar(aes(ymin = lower_CI,
                    ymax = upper_CI))

r graph figure 2 r data confidence intervals using ggplot2 package

Further Resources & Related Articles

Please find some additional R tutorials on topics such as variables, graphics in R, and ggplot2 below.

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