This question already has answers here:
Set NA to 0 in R
(6 answers)
How do I replace NA values with zeros in an R dataframe?
(29 answers)
Closed 5 years ago.
Basically, I am iterating through some values, some which may be NA. If it is NA, I'd like to set it to 0.
For example
if (myValue.is.na){
myValue=0
}
Related
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Dictionary style replace multiple items
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Multiple replacement in R
(3 answers)
How to replace multiple values at once [duplicate]
(2 answers)
Closed 3 months ago.
i have a dataframe
namer None namei ... None
None None Na ... namej
.
.
named namev None ... Na
and i want to replace all Nones with 0 and everything else with 1
i tried to use lapply with the following function
fu = function(x){
if (x=="None")
0
else
1}
but it throws an error, how can i fix this
This question already has answers here:
Replace given value in vector
(8 answers)
How do I change a single value in a data.frame?
(4 answers)
How to change a single value in a data frame in R
(4 answers)
How to change a cell value in data.frame
(2 answers)
Closed 4 months ago.
I have the following data frame:
df <- data.frame(
item=c("a","","a","d","e"),
price_today=c(1,2,"THREE%%",4,"SIX/SIX"))
If I would like to select "THREE%%" and "SIX/SIX" in column price_today and convert them to "3?3" and "6?6", respectively, how should I go about it?
This question already has answers here:
How can I tell R to round correctly?
(2 answers)
Round up from .5
(7 answers)
Closed 6 months ago.
I want to round the number 6.85 to 1 digit after decimal expected answer is 6.9
This question already has answers here:
How to get the sum of each four rows of a matrix in R
(3 answers)
Average of n rows
(1 answer)
Closed 8 months ago.
I have a column with hundreds of values, I want to get the average for each 4 rows, then I move to another four rows, etc. How could I write that loop in R studio, I attached here a simple example, what should I do if I have NA values, how to consider those values as zeros?
This question already has answers here:
How to count the number of unique values by group? [duplicate]
(1 answer)
Unique values in each of the columns of a data frame
(9 answers)
Closed 5 years ago.
Is there better way to compute this instead of:
length(unique(vector))
let's assume that we donno what class is the vector.
You can use
library(data.table)
vector <- c(1,2,2,2,3)
uniqueN(vector)