All Levels of a Factor in a Model Matrix in R

0 votes
I have a data.frame that includes factor and numeric variables, as may be seen below.

testFrame = data.frame(First=sample (1:10), Second=sample (1:20), Third=sample (1:10), Replace=T);
Fifth=rep(c("Edward","Frank","Georgia","Hank","Isaac"),4) I want to construct a matrix that assigns dummy variables to the factor and leaves the numeric variables alone. Fourth=rep(c("Alice","Bob","Charlie","David"), 5), and Fifth=rep(c("Edward","Frank","Georgia

First + Second + Third + Fourth + Fifth, data=testFrame, model.matrix
This eliminates the reference level for one level of each factor, as expected when executing lm. But I want to create a matrix that includes a dummy or indicator variable for each level of every factor. I am not concerned about multicollinearity because I am developing this matrix for glmnet.

Is there a way to have model.matrix create the dummy for every level of the factor?
Jul 9 in Data Analytics by avinash
• 1,840 points
21 views

No answer to this question. Be the first to respond.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.

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
• 3,720 points
3,228 views
+2 votes
1 answer

Show a list of all variables in R

Hi Swathi, You can use ls() to list ...READ MORE

answered Jun 27, 2019 in Data Analytics by Cherukuri
• 33,010 points
54,039 views
0 votes
1 answer

How to replace all occurrences of a character in a character column in a data frame in R

If you used sub() to replace the ...READ MORE

answered Jun 29, 2019 in Data Analytics by anonymous
• 33,010 points
16,260 views
0 votes
1 answer

How do I make a matrix from a list of vectors in R?

Suppose l1 and l2 are my vectors, li = ...READ MORE

answered Aug 7, 2019 in Data Analytics by Cherukuri
• 33,010 points
230 views
0 votes
1 answer
0 votes
1 answer

How to create dummy variables based on a categorical variable of lists in R?

You can use mtabulate in the following way: library(qdapTools) cbind(data[1], ...READ MORE

answered Apr 13, 2018 in Data Analytics by CodingByHeart77
• 3,720 points
1,677 views
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
• 1,610 points
438 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
483 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
4,353 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
504 views
webinar REGISTER FOR FREE WEBINAR X
Send OTP
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP