WebOct 7, 2024 · Part of R Language Collective Collective 1 I would like to select rows of a data frame based on conditions on two columns that should identify a unique row. WebThe function recursively filters the data by a given series of conditions. The filter can be a single condition or multiple conditions. .data will be filtered by the first condition; then the …
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WebJul 28, 2024 · Filter (function (x) x [ ["total"]] == 7, lst) Using purrr we can use keep / discard library (purrr) keep (lst, ~. [ ["total"]] == 7) discard (lst, ~. [ ["total"]] != 7) Or map_lgl lst [map_lgl (lst, ~. [ ["total"]] == 7)] data Assuming your list … WebList-variables. Data frames are usually made up of a list of atomic vectors that all have the same length. However, it’s also possible to have a variable that’s a list, which I call a list-variable. Because of data.frame()s complex coercion rules, the easiest way to create a data frame containing a list-column is with data_frame():
WebJul 28, 2024 · Filter r dataframe for row and column names by value. 3. Filtering a data.frame that has same row and column names. 1. R filter rownames in matrix. 0. Filtering a data frame by column names. 2. Filtering a dataframe in row names from a column values. Hot Network Questions Unreadable Russian TeX files WebIt's a bit verbose, but it's very handy and powerful if you have long strings and want to filter in what row is located a specific word. Comparing with the accepted answers:
WebAug 8, 2016 · You can index names (df) without using dplyr: df <- structure (list (a = c (1, 2, 3), b = c (4, 5, 6), c = c (7, 8, 9)), .Names = c ("a", "b", "c"), row.names = c (NA, -3L), class = "data.frame") df [,c ("a",names (df) [3]) ] Output: a c 1 1 7 2 2 8 3 3 9 Share Improve this answer Follow answered Feb 9, 2024 at 17:10 Andrew Olney 681 4 12 WebAug 15, 2024 · How can I filter a list of dataframes based on their length? The list is nested -- meaning there are lists of lists of dataframes of different lengths. Here is an example. I'd like to filter or subset the list to include only those objects that are length n, say 3. Here is an example and my current approach.
WebJul 12, 2024 · Note that st_intersection(, sparse = TRUE) returns a logical matrix, and filter wants a vector. We can get the selection vector by subsetting the matrix: nc %>% filter(st_intersects(., ash_point, sparse = FALSE)[1,]) The . is needed to have nc also be the argument to st_intersects, not only to filter.. It would be nice if the filter.sf method would …
WebJan 20, 2016 · Result: dataframe. which (df == "2") #returns rowIndexes results from the entire dataset, in this case it returns a list of 3 index numb. Result: 5 13 17. length (which (df == "2")) #count numb. of rows that matches a condition. Result: 3. You can also do this column wise, example of: pitch size cricketWebI am looking for a condition which will return the index of a vector satisfying a condition. For example- I have a vector b = c (0.1, 0.2, 0.7, 0.9) I want to know the first index of b for which say b >0.65. In this case the answer should be 3. I tried which.min (subset (b, b > 0.65)) But this gives me 1 instead of 3. Please help. stirrup splint ortho glassWebMar 29, 2024 · Try Filter(length, your_list) for getting ALL elements that are not integer(0) – Sotos. Mar 29, 2024 at 13:47. Is this a list with Elements of length one? If so, why not convert it to a vector before trying to operate on it? – Julian_Hn. Mar 29, 2024 at 13:47 pitch siteWebrlist. rlist is a set of tools for working with list objects. Its goal is to make it easier to work with lists by providing a wide range of functions that operate on non-tabular data stored in them. This package supports list mapping, filtering, grouping, sorting, updating, searching, file input/output, and many other functions. stir sticks woodWebJan 18, 2015 · I can use dplyr::filter () to extract the row from the dataframe... the issue is that want to extract the index value of the filtered row and add it to a list of index entries that meet the search criteria. Question: Is there a simple way to search a dataframe using dplyr against specific criteria and return the numeric index of each row found? pitch slapped logoWebFiltering. List filtering is to select list elements by given criteria. In rlist package, more than ten functions are related with list filtering. Basically, they all perform mapping first but then aggregate the results in different ways. ... The following code will pick up the list element whose index is even. people %>>% list.filter(.i %% 2 ... pitch silent gamepitch silent