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The common R data types for research are numeric, factor, and character.
a <- c(-1, -3, 0, 5, 7, 8, 4, 6.3, 10)
- "<-" is assignment operator
- "c()" function combines values into a vector or list.
- We can get help about functions by using question mark and the name of the function, for example:
drink_vector <- (c('milk', 'water', 'juice')) drink_vector #  "milk" "water" "juice" drink_factor <- factor(drink_vector) drink_factor #  milk water juice # Levels: juice milk water
d<-c('Hellow world', 'R is fun!') d #  "Hellow world" "R is fun!"
Add a column with $ operator
a <- c(1, 3, 5, 7) b <- c(2, 4, 6, 8) df<-data.frame(a, b) df
Add a column with cbind function
df$new_column <- c(1, 2, 3, 4) df
View df as table in RStudio
df <- cbind(df, new_new_column = c('a', 'b', 'c', 'd')) df
Get names of dataframe
Display the Structure of the dataframe
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