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Tag: data frames

Manipulating Data Frames in R

Manipulating Data Frames in R

Data Science, Recent Posts
Learn To Manipulate Data Frames Using The “mtcars” Dataset Below is an introduction to programming with r, all code in this exercise is only using base r and no other libraries are needed. Task 1: Create a new column to find Displacement per Cylinder  Create a new variable (DisplacementPerCylinder), to calculate the total displacement per cylinder in cubic inches for each vehicle from the mtcars dataset. # "str" allows you to display the internal structure of an R object str(mtcars) ## 'data.frame': 32 obs. of 11 variables: ## $ mpg : num 21 21 22.8 21.4 18.7 18.1 14.3 24.4 22.8 19.2 ... ## $ cyl : num 6 6 4 6 8 6 8 4 4 6 ... ## $ disp: num 160 160 108 258 360 ... ## $ hp : num 110 110 93 110 175 105 245 62 95 123 ... ## $ drat: num 3.9 3.9 3.85 3.08 3