How can I set the origin/interception of the y-axis and x-axis in ggplot2?

The line of the x-axis should be exactly at **y=Z.**

With** Z=0** or another given value.

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To force the origin to start at zero, you can use the **exapnd_limits** function with **scale_x_continuous**, and **scale_y_continuous** as follows:

library("ggplot2")

df <- data.frame(x = 1:4, y = 1:4)

p <- ggplot(df, aes(x, y)) + geom_point()

p <- p + expand_limits(x = 0, y = 0) +theme_bw()

p + scale_x_continuous(expand = c(0, 0)) + scale_y_continuous(expand = c(0, 0))

Output: