apply
Why doesn't (apply or [true false]) work in Clojure?
From what I understand about apply, it unpacks a list and turns the elements into arguments for a function.[详细]
2023-01-02 18:18 分类:问答addEventListener using apply()
I\'m trying to invoke addEventListener() using apply() method. The code is like: function rewrite(old){[详细]
2022-12-31 02:35 分类:问答applying apply() to deeply embeded list elements only
I would like to apply my function to only element开发者_StackOverflows that are deeper in the list structure.[详细]
2022-12-30 22:36 分类:问答Last Observation Carried Forward In a data frame? [duplicate]
This question already has answers here: Replacing NAs with latest non-NA value (21 answers) Closed 4 years ago.[详细]
2022-12-29 20:50 分类:问答Remove columns from dataframe where ALL values are NA
I have a data frame where some of the columns contain NA values. How can I remove columns wher开发者_高级运维e all rows contain NA values?Try this:[详细]
2022-12-27 03:51 分类:问答Row/column counter in 'apply' functions
What if one wants to apply a functon i.e. to each row of a matrix, but also wants to use as an argument for this function the number of that row. As an example, suppose you wanted to get the n-th root[详细]
2022-12-25 06:33 分类:问答Why does as.factor return a character when used inside apply?
I want to convert variables into factors using apply(): a <- data.frame(x1 = rnorm(100), x2 = sample(c(\"a\",\"b\"), 100, replace = T),[详细]
2022-12-22 15:15 分类:问答Subset a data.frame by list and apply function on each part, by rows
This may seem as a typical plyr problem, but I have something different in mind. Here\'s the function that I want to optimize (skip the for loop).[详细]
2022-12-21 17:28 分类:问答Is R's apply family more than syntactic sugar?
...regarding execution time and / or memory. If this is not true, prove it with a code snippet. Note that speedup by vectorization does not count. The 开发者_Go百科speedup must come from apply (tappl[详细]
2022-12-20 14:17 分类:问答Handling NA values in apply and unique
I have a 114 row by 16 column data frame where the rows are individuals, and the columns are either their names or NA. For example, the first 3 rows looks like this:[详细]
2022-12-20 10:41 分类:问答