# R Howtos

## R Memory

## R comment

## R Loop

## R Data Frame

- Replace NA With Zero in R
- Count Number of Observations in R
- Count Number of Rows in R
- Combine Two Data Frames in R

## R Function

## R Plot

- Change Point Size in Graphs in R
- Label BoxPlot in R
- ylim() and xlim() in R
- Create Stacked Histogram in R
- Set Thickness of Plots in R
- How to set axis limits in ggplot2 R plots