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I have a list and I want to remove a single element from it. How can I do this?
I've tried looking up what I think the obvious names for this function would be in the reference manual and I haven't found anything appropriate.
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How to Remove an Element from a List Using the remove() Method in Python. To remove an element from a list using the remove() method, specify the value of that element and pass it as an argument to the method. remove() will search the list to find it and remove it.
The methods are remove(), pop() and clear() . Besides the list methods, you can also use a del keyword to remove items from a list.
You can use the pop() method to remove specific elements of a list. pop() method takes the index value as a parameter and removes the element at the specified index.
If you don't want to modify the list in-place (e.g. for passing the list with an element removed to a function), you can use indexing: negative indices mean "don't include this element".
x <- list("a", "b", "c", "d", "e"); # example list x[-2]; # without 2nd element x[-c(2, 3)]; # without 2nd and 3rd Also, logical index vectors are useful:
x[x != "b"]; # without elements that are "b" This works with dataframes, too:
df <- data.frame(number = 1:5, name = letters[1:5]) df[df$name != "b", ]; # rows without "b" df[df$number %% 2 == 1, ] # rows with odd numbers only 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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