...if_else na_if pmax pmin recode recode_factormutate, transmutemutate_add_row add_column rename rownames_to_column..., column_to_rowname 向量化函数汇总 计数dplyr:: n n_distinct base::sum(!...write_* data.table 与 base 数据导入 fread 数据导出 fwrite data.table ...
I have tried doing this using bothif_elseandcase_whenbut these functions require either a "false" argument (if_else) or by default set values that are not matched to NA (case_when): iris_mutated<-iris%>%dplyr::group_by(Species)%>%dplyr::mutate(Sepal.Length=if_else(...
当Select语句中有附加变量时,Mutate返回NA值是指在R语言中使用dplyr包的mutate函数进行数据处理时,如果在mutate函数中使用了Select语句并且包含了附加变量,那么在处理过程...
接着之前_dplyr_mutate_impl,对应代码如下 // [[Rcpp::export]]SEXPmutate_impl(DataFrame df,QuosureList dots){if(dots.size()==0)returndf;check_valid_colnames(df);if(is<RowwiseDataFrame>(df)){returnmutate_grouped<RowwiseDataFrame,LazyRowwiseSubsets>(df,dots);}elseif(is<GroupedDataFrame>(df...
我们可以使用dplyr::across()代替for循环,并将循环重写为函数。请注意以下几点:1.我故意不包括绘图。
library(dplyr) library(purrr) dat %>% mutate(chronic = map_chr(row_number(), ~{ inds <- between(date, date[.x] - 365, date[.x] - 1) if(positive[.x] == "yes" && any(inds) && mean(positive[inds] == 'yes') >= 0.5) 'yes' else 'no' })) # date positive chronic #1 ...
这里有一个使用across而不是all_of的解决方案。
我已经修改了你的代码,希望它能得到你想要的。另一个小问题,我用ifelse来代替case_when,两者都应该...
.data在mutate()中不建议使用。它只在整洁的选择中被弃用,例如。例如select(...)或pivot_longer(cols...
Logical operations:<,>,==,!=,&,|,ifelse(), etc. String manipulation:stringrpackage functions likestr_extract(),str_replace(), etc. Group-wise mutations usinggroup_byin combination withmutate. Here's an example demonstrating some of these advanced features: ...