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Replace Values in Factor Vector or Column in R (Example) | as.character, as.factor & levels Function
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R code of this video:
x ＜- factor(c(LETTERS[1:5], "C")) # Create example factor vector
x # Print example factor vector
x_warning ＜- x # Duplicate example vector
x_warning[3] ＜- "New" # Try to replace factor value
x_warning # Print factor with NA
x_new1 ＜- x # Duplicate example vector
x_new1[3] ＜- "New" # Replace specific value
x_new1 # Print updated vector
x_new2 ＜- x # Duplicate example vector
levels(x_new2)[levels(x_new2) == "C"] ＜- "New" # Replace entire factor level
x_new2 # Print updated vector
x2 = factor(c("aaa", "bbb", "aaa")))
data # Print example data frame
data_new ＜- data # Duplicate example data frame
data_new$x1[1] ＜- "Hello" # Replace specific value
levels(data_new$x2)[levels(data_new$x2) == "aaa"] ＜- "Hey" # Replace entire factor level
data_new # Print new data frame
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x ＜- factor(c(LETTERS[1:5], "C")) # Create example factor vector
x # Print example factor vector
x_warning ＜- x # Duplicate example vector
x_warning[3] ＜- "New" # Try to replace factor value
x_warning # Print factor with NA
x_new1 ＜- x # Duplicate example vector
x_new1[3] ＜- "New" # Replace specific value
x_new1 # Print updated vector
x_new2 ＜- x # Duplicate example vector
levels(x_new2)[levels(x_new2) == "C"] ＜- "New" # Replace entire factor level
x_new2 # Print updated vector
x2 = factor(c("aaa", "bbb", "aaa")))
data # Print example data frame
data_new ＜- data # Duplicate example data frame
data_new$x1[1] ＜- "Hello" # Replace specific value
levels(data_new$x2)[levels(data_new$x2) == "aaa"] ＜- "Hey" # Replace entire factor level
data_new # Print new data frame
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