CODEWITHSUNDEEP
r
user3390169
user3390169

Reputation: 1045

r: Convert list of matrices to a data frame

I ran a foreach loop to build a list of 100 matrices. The output of each loop is one 7x12 matrix. Now, I want to create a scatterplot the last two columns of each of those matrices using ggplot2. To do this, I figure that I need to convert the list into one big data.frame that would come out to 700x12. Other posters have solved this for a list of vectors but I don't see one that works for my situation. Here is what I have tried:

as.data.frame(matrix(t(unlist(myList)), ncol=12)))
rbind(myList[1:100])

Upvotes: 3

Views: 1250

Answers (2)

Judu Le
Judu Le

Reputation: 81

In your foreach loop, why don't you convert the matrix to a dataframe? If x is your matrix, you can just add this to the end:

data.frame(x)

Then you can just use rbind(myList[1:100]) as you have been.

Upvotes: 1

Jasper
Jasper

Reputation: 555

In base R, you could use:

Reduce( rbind.data.frame, myList[1:100] )

Upvotes: 2

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