- Which R function will overlay a line on a scatter plot?
- How do I add a legend to a plot in R?
- How do I add a title to a histogram in R?
- How do I color a plot in R?
- Which functions can be used to add a graph to an existing plot in R?
- How do I add labels to a plot in R?
- How do I plot multiple histograms in R?
- How do you add a label to a scatter plot?
- How do I subset data in R?
- How do I combine two plots in R?

## Which R function will overlay a line on a scatter plot?

A scatter plot can be created using the function plot(x, y).

The function lm() will be used to fit linear models between y and x.

A regression line will be added on the plot using the function abline(), which takes the output of lm() as an argument.

You can also add a smoothing line using the function loess()..

## How do I add a legend to a plot in R?

This post explains how to add a legend to a chart made with base R, using the legend() function….Add a legend to a base R chartlegend : names to display.bty : type of box around the legend. … horiz : legend in column or in row.col : symbol color.pch : symbol type. … pt. … cex : text size.More items…

## How do I add a title to a histogram in R?

You can change the title of the histogram by adding main as an argument to hist() function. In this case, you make a histogram of the AirPassengers data set with the title “Histogram for Air Passengers”: script. R.

## How do I color a plot in R?

In R, the color black is denoted by col = 1 in most plotting functions, red is denoted by col = 2 , and green is denoted by col = 3 . So if you’re plotting multiple groups of things, it’s natural to plot them using colors 1, 2, and 3.

## Which functions can be used to add a graph to an existing plot in R?

The function curve allows you to plot equations or complex functions, either on their own, or added to an existing plot (with add=T ). curve provides the function to be plotted with a vector of x-axis values called x with which to calculate the corresponding y-axis data.

## How do I add labels to a plot in R?

Use the title( ) function to add labels to a plot. Many other graphical parameters (such as text size, font, rotation, and color) can also be specified in the title( ) function.

## How do I plot multiple histograms in R?

If you have a histogram object, all the data you need is contained in that object. Using plot() will simply plot the histogram as if you’d typed hist() from the start. However, you can now use add = TRUE as a parameter, which allows a second histogram to be plotted on the same chart/axis.

## How do you add a label to a scatter plot?

This is what you want to do in a scatter plot:right click on your data point.select “Format Data Labels” (note you may have to add data labels first)put a check mark in “Values from Cells”click on “select range” and select your range of labels you want on the points.

## How do I subset data in R?

So, to recap, here are 5 ways we can subset a data frame in R:Subset using brackets by extracting the rows and columns we want.Subset using brackets by omitting the rows and columns we don’t want.Subset using brackets in combination with the which() function and the %in% operator.Subset using the subset() function.More items…•

## How do I combine two plots in R?

Combining PlotsR makes it easy to combine multiple plots into one overall graph, using either the. … With the par( ) function, you can include the option mfrow=c(nrows, ncols) to create a matrix of nrows x ncols plots that are filled in by row. … The layout( ) function has the form layout(mat) where.More items…