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I have a list containing data frames as its elements in R.
Example:
df1 <- data.frame("names"=c("John","Sam","Dave"),"age"=c(21,22,25)) df2 <- data.frame("names"=c("John","Sam"),"score"=c(22,25)) df3 <- data.frame("names"=c("John","Sam","Dave"),"country"=c("US","SA","NZ")) mylist <- list(df1,df2,df3) Is it possible to merge all the elements of mylist together without using a loop?
My desired output for this example is:
names age score country 1 John 21 22 US 2 Sam 22 25 SA The list in this example has only three elements; however, I am looking for a solution that can handle an arbitrary number of elements.
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Combine lists in R Two or more R lists can be joined together. For that purpose, you can use the append , the c or the do. call functions. When combining the lists this way, the second list elements will be appended at the end of the first list.
To combine data frames stored in a list in R, we can use full_join function of dplyr package inside Reduce function.
How do I concatenate two columns in R? To concatenate two columns you can use the <code>paste()</code> function. For example, if you want to combine the two columns A and B in the dataframe df you can use the following code: <code>df['AB'] <- paste(df$A, df$B)</code>.
combine. lists is an R function developped combine/append two lists, with special attention to dimensions present in both. combine. lists(list1, list2) returns a list consisting in the elements found in either list1 or list2, giving precedence to values found in list2 for dimensions found in both lists.
You can use Reduce, one liner solution:
Reduce(merge,mylist) names age score country 1 John 21 22 US 2 Sam 22 25 SA If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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