Tag: rstats

Oct132019 by Terry6 Comments

Renaming Columns with R

Often data you’re working with has abstract column names, such as (x1, x2, x3…). Typically, the first step I take when renaming columns with r is opening my web browser. For some reason no matter the amount of times doing this it’s just one of those things. (Hoping that writing about it will change that) The dataset cars is data from the 1920s on "Speed and Stopping Distances of Cars". There is only 2 columns shown below. colnames(datasets::cars) [1] "speed" "dist" If we wanted to rename the column "dist" to make it easier to know what the data is/means we can do so in a few different ways. Using dplyr: cars %>% rename("Stopping Distance (ft)" = dist) %>% colnames() [1] "speed" "Stopping Distance (ft)" cars %>% rename("Stopping Di

Aug182019 by Terry2 Comments

How To Select Multiple Columns Using Grep & R

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Why you need to be using Grep when programming with R. There's a reason that grep is included in most if not all programming language to this day 44 years later from creation. It's useful and simple to use. Below is an example of using grep to make selecting multiple columns in R simple and easy to read. The dataset below has the following column names. names(data) # Column Names [1] "fips" "state" "county" "metro_area" [5] "population" "med_hh_income" "poverty_rate" "population_lowaccess" [9] "lowincome_lowaccess" "no_vehicle_lowaccess" "s_grocery" "s_supermarket" [13] "s_convenience" "s_specialty" "s_farmers_market" "r_fastfood" &#...