How to replace only set of values in a vector to different values in a dataframe

0 votes
How to replace only set of values in a vector to different values in a dataframe?

I want to replace the values of few countries with its abbrevated form.

Can someone tell how to do this?
Aug 16, 2019 in Data Analytics by shanaya
788 views

1 answer to this question.

0 votes
If you have a condition using which specific values need to be changed then add the condition using which() to fetch the required values from the vector and then change.

For example,

dataframe$vector[which(condition) ] = "New Value"

Suppose you need to fetch the first 2 characters of the names from a vector which are from africa continentconti Then you can use r code as

countries$names[which(continent == "Africa")] = substr(countries$names,1,3)
answered Aug 19, 2019 by anonymous
• 33,030 points

Related Questions In Data Analytics

0 votes
1 answer

How to write a custom function which will replace all the missing values in a vector with the mean of values in R?

Consider this vector: a<-c(1,2,3,NA,4,5,NA,NA) Write the function to impute ...READ MORE

answered Jul 4, 2018 in Data Analytics by CodingByHeart77
• 3,750 points
4,585 views
+1 vote
2 answers

Custom Function to replace missing values in a vector with the mean of values

Try this. lapply(a,function(x){ifelse(is.na(x),mean(a,na.rm = TRUE ...READ MORE

answered Aug 14, 2019 in Data Analytics by anonymous
1,969 views
0 votes
1 answer

How to replace NA values in a dataframe with Zero's ?

It is simple and easy: df1<-as.data.frame(matrix(sample(c(NA, 1:10), 100, ...READ MORE

answered Apr 10, 2018 in Data Analytics by CodingByHeart77
• 3,750 points
2,078 views
+1 vote
2 answers
0 votes
1 answer

Big Data transformations with R

Dear Koushik, Hope you are doing great. You can ...READ MORE

answered Dec 18, 2017 in Data Analytics by Sudhir
• 1,570 points
1,046 views
0 votes
2 answers

Transforming a key/value string into distinct rows in R

We would start off by loading the ...READ MORE

answered Mar 26, 2018 in Data Analytics by Bharani
• 4,660 points
1,221 views
0 votes
1 answer

Finding frequency of observations in R

You can use the "dplyr" package to ...READ MORE

answered Mar 26, 2018 in Data Analytics by Bharani
• 4,660 points
5,909 views
0 votes
1 answer

Left Join and Right Join using "dplyr"

The below is the code to perform ...READ MORE

answered Mar 27, 2018 in Data Analytics by Bharani
• 4,660 points
1,153 views
+1 vote
2 answers

How to count the number of elements with the values in a vector?

Use dplyr function group_by(). > n = as.data.frame(num) > ...READ MORE

answered Aug 21, 2019 in Data Analytics by anonymous
• 33,030 points
5,050 views
+1 vote
5 answers

How to remove NA values from a Vector in R?

Hello team, you can use na.omit x <- c(NA, 3, ...READ MORE

answered Dec 9, 2020 in Data Analytics by anonymous
• 82,840 points
195,350 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP