Setup

Tasks:

1. Open the slides for today

2. Open/create your seminRs project

3. Download the R Script to your seminRs project

Exporting Plots with ggsave()

Usage

ggsave("peng_scatterplot.png", plot = peng_scatter) # to use the default size
# or
ggsave("peng_scatter_2.png", plot = peng_scatter, width = 15, height = 15, units = "cm")Copy Code

Where "peng_scatterplot.png" is the name we want to give the new file & the image type we want it to be

• we can create many different file types (pdf, jpeg & so on..)

plot = peng_scatter is the name of the plot object that we've created with ggplot()

width = & height = allows us to specify the size of the image, measured in the units = we've specified

The plot will be saved to your working directory (aka your R project) by default, or you can specify a file path

Assignment <-

To be able to specify the plot object we want to save with ggsave(), we have to give our plot a name <-

For example:

peng_scatter <- ggplot2::ggplot(peng_data, aes(bill_length_mm, bill_depth_mm, colour = species))
peng_scatter <- peng_scatter +
  geom_point() +
  labs(title = "Scatterplot of Bill Length & Bill Depth", 
       x = "Bill Length (mm)", y = "Bill Depth (mm)") +
  theme_bw()Copy Code

If you save your plot, and can't see any data points on it - just the grid, it is likely you have skipped out this assignment step

Just assign your plot like above, re-run the code, & re-run ggsave() to overwrite the image

Inserting into Word

Inserting your exported plots into a Word doc is super simple

Insert > Pictures > This Device.. & select the image from your working directory