Add legend to a plot with R
18,715
Solution 1
legend( "topleft", c("cars", "trucks", "cars1", "trucks1"),
text.col=c("blue", "red", "yellow", "green") )
Use the ?legend command to see options, such other locations on the graph, besides "topleft" or text size, whether to have a box around the legend, etc.
Solution 2
For example
legend(
"topright",
lty=c(1,2,1,2),
col=c("blue", "red", "yellow", "green"),
legend = c("cars", "trucks", "cars1", "trucks1")
)
See ?legend
.
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Bio
Updated on July 24, 2022Comments
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Bio almost 2 years
I create 4 line in one plot using R . Here the code
# Define 2 vectors cars <- c(123.07, 110.51, 96.14, 98.71, 101.3) trucks <- c(110.31, 89.91, 89.81, 89.31, 93.4, 95.81) cars1 <- c(123.227, 110.221, 93.14, 98.22, 122.3) trucks1 <- c(120.31, 89.91, 89.81, 89.31, 93.4, 95.81) # Graph cars using a y axis that ranges from 0 to 12 plot(cars, type="o", col="blue", ylim=c(80,130)) # Graph trucks with red dashed line and square points lines(trucks, type="o", pch=22, lty=2, col="red") lines(cars1, type="o", col="yellow", ylim=c(80,130)) # Graph trucks with red dashed line and square points lines(trucks1, type="o", pch=22, lty=2, col="green") # Create a title with a red, bold/italic font title(main="Autos", col.main="red", font.main=4)
I would like to know how can I add the legend for each plot (line) in the plot.
Thank you