Question

how to rename a row in r studio, for example

view(mydata)

a	b	c
red	1	4
yellow	2	4
white*	5	6

black	0	6
pink	6	3
purple	10	5

I want to rename the row 4, white* to white. I need to remove the "*"

also I want to add a new column, with repetition values for ex.

new column

1

2

3

1

2

3

please help, how can I write in R-program

Answer 1

STEP - BY - STEP PROCESS

(1.) Make a data frame ==> 'mydata'

a <- c('red', 'yellow', 'white*', 'black', 'pink', 'purple')
b <- as.numeric(c(1, 2, 5, 0, 6, 10))
mydata <- data.frame(a, b)
mydata

(2.) Remove "*" from white*

mydata$a <-  gsub("[*]", "", mydata$a)
mydata

(3.) A new column with repetition values

new_col <- c(rep(1:3,length.out=nrow(mydata)))
mydata['new_col'] <- new_col
mydata

NOTE: All codes above in the R language. Please use R-studio for better understanding.

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