Beginning Question

[Gretchen_Walker]

Hello, I have absolutely no knowledge of coding but I am taking a stats class where I need to use this program and I am struggling because I have little guidance. I want to make a histogram of the variable "Exercise" from a data set (attaching a screenshot) and whenever I type hist(exercise) it tells me the object was not found. I am sure I am making an error, does anyone know what to do? Thanks so much.

[williaml]

Try hist(StudentSurvey$Exercise)

Also, don't attach screenshots. Create a reproducible example next time.

FAQ: What's a reproducible example (`reprex`) and how do I create one?

Why reprex? Getting unstuck is hard. Your first step here is usually to create a reprex, or reproducible example. The goal of a reprex is to package your code, and information about your problem so that others can run it and feel your pain. Then, hopefully, folks can more easily provide a solution. What's in a Reproducible Example? Parts of a reproducible example: background information - Describe what you are trying to do. What have you already done? complete set up - include any library() calls and data to reproduce your issue. data for a reprex: Here's a discussion on setting up data for a reprex make it run - include the minimal code required to reproduce your error on the data…

[technocrat]

ls() will show the objects in namespace; that will confirm that the message in the screenshot is correct. See also the upper right hand quadrant: "Global environment is empty." That indicates that nothing at all has been loaded.

When the "StudentSurvey" object has been loaded, use

str(StudentSurvey)

to see what types of variable are contained. Only numeric variables can be plotted as histograms.

An alternative display is provided by stem

stem(mtcars$mpg)
#> 
#>   The decimal point is at the |
#> 
#>   10 | 44
#>   12 | 3
#>   14 | 3702258
#>   16 | 438
#>   18 | 17227
#>   20 | 00445
#>   22 | 88
#>   24 | 4
#>   26 | 03
#>   28 | 
#>   30 | 44
#>   32 | 49

^{Created on 2020-09-18 by the reprex package (v0.3.0)}