ggplot barplot knitted with R Markdown

Question

Problem: The labels of the y-axis of this plot are too close too each other.

Question: How can I increase the spacing between labels?

Answer 1

Set the fig.height in your rmd chunck.
Sample

```{r, warning=FALSE,message=FALSE, fig.height=12, fig.width=12}
# Your ggplot code goes over here

```