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R | Data Entry

Multiple Sample Data

In the steps below, the commands should be typed directly into the R console window.

Entering Data

Enter the data in vectors that assign variable names. On the categorical Factor, you will use numbers to represent the categories (or “levels”) of the variable.

Factor <- c(rep(1,4),rep(2,4))
Outcome <- c(0,0,3,5,4,7,4,9)

Declare which variable is considered a Factor. In addition to specifying how many levels the factor has, you can provide labels for them.

Factor <- factor(Factor,levels=c(1,2),labels=c("Level1","Level2"))

Viewing Data

Create and display a data frame to view the data set.

IndependentData <- data.frame(Factor,Outcome)
IndependentData

Adding Data

If your data set has more than two groups, simply be sure to add a group indicator (a value on the “Factor” variable) and a “Outcome” for each additional person.

Factor <- c(rep(1,4),rep(2,4),rep(3,4))
Outcome <- c(0,0,3,5,4,7,4,9,9,6,4,9)

Factor <- factor(Factor,levels=c(1,2,3),labels=c("Level1","Level2","Level3"))

OneWayData <- data.frame(Factor,Outcome)
OneWayData