eapply Apply a Function Over Values in an Environment 对环境中的值使用函数 eapply(env, FUN, ..., all.names = FALSE, USE.NAMES = TRUE) mapply Apply a Function to Multiple List or Vector Arguments 对多个列表或者向量参数使用函数 mapply(FUN, ..., MoreArgs = NULL, SIMPLIFY = TRUE, USE....
apply :Apply Functions Over Array Margins by :ApplyaFunctiontoaData Frame Split by Factors eapply :ApplyaFunction Over Values in an Environment lapply :ApplyaFunction overaList or Vector mapply :ApplyaFunctiontoMultiple List or Vector Arguments rapply :Recursively ApplyaFunctiontoaList tapply :Apply...
我相信大家经常会使用Excel对数据进行排序。有时候我们会按照两个条件来对数据排序。假设我们手上有下面这...
left_join(data1, data2, by = "ID") # Apply left_join dplyr function 编辑 R语言使用dplyr包右连接两个dataframe数据(right join) right_join(data1, data2, by = "ID") # Apply right_join dplyr function 编辑 R语言使用dplyr包全连接两个dataframe数据(full join) full_join(da...
那么apply包括哪些函数呢?在 R console中键入??apply,可以看到在base包中包含如下函数:(apply在别的包里还有起到各自功能的相关函数,我们只看涉及数据转换的这些个) apply :Apply Functions Over Array Margins by :Apply aFunctionto aDataFrame Split by Factors eapply :Apply aFunctionOver Valuesinan ...
1. apply()函数 # create a matrix of 10 rows x 2 columnsm<-matrix(c(1:10,11:20),nrow=10,ncol=2)# mean of the rowsapply(m,1,mean)[1]6789101112131415# mean of the columnsapply(m,2,mean)[1]5.515.5# divide all values by 2apply(m,1:2,function(x)x/2)[,1][,2][1,]0.55...
Finally, if you want your function to return multiple values, you will have to store the different results in a list and include it in the return statement: mean_sum <- function(num_1, num_2) { mean <- (num_1 + num_2) / 2 sum <- num_1 + num_2 return (list(mean, sum))...
Sorting by Multiple Factors (Multiple Columns) Moving along, what if we wanted to sort the entire list by the largest birds for each diet? Easy enough, the order function supports the ability to sort using multiple variables (values in multiple columns). ...
Multiple columns can be simultaneously deleted from a data frame in R. This tutorial demonstrates how to delete multiple columns in R. Delete Multiple Columns in R There are two methods to delete multiple columns from a data frame in R. These methods are demonstrated below. Delete Multiple ...
prop_test(),pairwise_prop_test()androw_wise_prop_test(). Performs one-sample and two-samples z-test of proportions. Wrappers around the R base function prop.test() but have the advantage of performing pairwise and row-wise z-test of two proportions, the post-hoc tests following a signi...