plotting 2 datasets with unequal lengths using ggplot2

ggplot2, r

Solution

Suppose you have datasets A and B as a data.frame:

A <- data.frame(x=1:5, y=11:15)
B <- data.frame(x=1:10, y=20:11)

You have to join them together:

df <- rbind(A, B) # Join A and B together.
df
    x  y
1   1 11
2   2 12
3   3 13
4   4 14
5   5 15
6   1 20
7   2 19
8   3 18
9   4 17
10  5 16
11  6 15
12  7 14
13  8 13
14  9 12
15 10 11

Then you can plot it:

ggplot(data=df, aes(x=x, y=y)) + geom_point()

If you want to distinguish points from dataset A and B by color:

df$dataset <- c(rep("A", nrow(A)), rep("B", nrow(B)))
df
    x  y dataset
1   1 11       A
2   2 12       A
3   3 13       A
4   4 14       A
5   5 15       A
6   1 20       B
7   2 19       B
8   3 18       B
9   4 17       B
10  5 16       B
11  6 15       B
12  7 14       B
13  8 13       B
14  9 12       B
15 10 11       B

ggplot(data=df, aes(x=x, y=y, col=dataset)) + geom_point()

If you want to distinguish points from dataset A and B by color and size and change axis labels:

ggplot(data=df, aes(x=x, y=y, col=dataset, size=dataset)) + geom_point() +
scale_color_manual(name="Dataset", labels = c("Data A","Data B"), values=c("red", "blue")) + 
scale_size_manual(name="Dataset", labels = c("Data A","Data B"), values=c(10, 5)) + 
xlab("xxxx") + ylab("yyyy")

See Tutorial or use google :).

Problem

I have 2 datasets with unequal lengths for plotting using ggplots2: ``` Data A; column x column y 0.23 1.54 0.44 1.46 0.69 1.37 0.70 1.21 0.75 1.01 0.88 0.91 Data B: column x column y 0.13 1.24 0.34 1.16 0.49 1.07 0.54 0.99 0.69 1.01 ``` I'm sure of how to write a code in ggplot2 for plotting these two data sets together. In both cases, plots shown as x axis = column x and y axis= column y. Can someone help me please? James

Original source