subset
list is a subset of another list
in Python, given two lists of pairs: listA = [ [1,20], [3,19], [37,11], [21,17] ] listB = [ [1,20], [21,17] ][详细]
2023-03-15 02:28 分类:问答How to get a list (or subset) from an OpenCL Kernel?
I have a large array with 2^20 ulongs on it.This little OpenCL kernel flows through it like a charm. Yet, I have absolutely no idea (and google hasn\'t helped here) how to return a small number of ite[详细]
2023-03-14 16:03 分类:问答Override [.data.frame to drop unused factor levels by default
The issue of dropping unused factor levels when subsetting has come up before. Common solutions include using character vectors where possible by declaring[详细]
2023-03-14 02:10 分类:问答Subsetting winter (Dez, Jan, Feb) from daily time series (zoo)
I have a daily zoo (xts) with a few decades of data in the following format: head(almorol) 1973-10-02 1973-10-03 1973-10-04 1973-10-05 1973-10-06 1973-10-07[详细]
2023-03-13 07:27 分类:问答Relating to subset assignment, how can this syntax be useful? [closed]
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical andcannot be reasonably answered in its current form. For help clari[详细]
2023-03-12 01:46 分类:问答How do I create component (subset) dataframes in R based on column values?
I\'d like to split a dataframe into several component dataframes based on the values in one column. In my example, I want to split dat into dat.1, dat.2 and dat.3 using the values in column \"cond\".[详细]
2023-03-11 01:20 分类:问答subsetting a data.frame in R
I am having a data frame like playersgames ------------- rogertennis messifootball agasiten开发者_如何学Pythonnis[详细]
2023-03-10 20:21 分类:问答subset data frame based on percentage
i have a data frame that contains a data like this : V1 V2 V3 120.34 130.31 140.12 150.12 the data frame is bigger but that\'s an example.[详细]
2023-03-10 13:26 分类:问答Optimize a summing of array (subset problem)
In the hottest part of my program (90% of time according to gprof), I need to sum one array A into another B. Both arrays are 2^n (n is 18..24) sized and holds an integer (for simplicity, actually the[详细]
2023-03-06 14:31 分类:问答Subset returned by queryForList is incorrect,but executed in SQL Developer it's OK
Subset returned in DAO class: List<Map<String, Object>> agreements = getJdbcTemplate().queryForList(sqlForDataQuery.toString(), paramsForList.toArray());[详细]
2023-03-06 03:31 分类:问答