R 将列表传递给函数参数?
大图:我希望我的用户定义函数像循环一样遍历参数列表(或向量)。(在本例中,参数是字符串)R 将列表传递给函数参数?,r,loops,dplyr,purrr,R,Loops,Dplyr,Purrr,大图:我希望我的用户定义函数像循环一样遍历参数列表(或向量)。(在本例中,参数是字符串) get\u avg2警告的平均值。默认值(~“防御等级”,na.rm=TRUE):参数不是数字 #>或者合乎逻辑:返回NA #>`summary()`解组输出(用`.groups`参数重写) #>平均值警告。默认值(~“处理等级”,na.rm=TRUE):参数不是数字 #>或者合乎逻辑:返回NA #>平均值警告。默认值(~“处理等级”,na.rm=TRUE):参数不是数字 #>或者合乎逻辑:返回NA #>`
get\u avg2警告的平均值。默认值(~“防御等级”,na.rm=TRUE):参数不是数字
#>或者合乎逻辑:返回NA
#>`summary()`解组输出(用`.groups`参数重写)
#>平均值警告。默认值(~“处理等级”,na.rm=TRUE):参数不是数字
#>或者合乎逻辑:返回NA
#>平均值警告。默认值(~“处理等级”,na.rm=TRUE):参数不是数字
#>或者合乎逻辑:返回NA
#>`summary()`解组输出(用`.groups`参数重写)
#>平均值警告。默认值(~“覆盖率等级”,na.rm=TRUE):参数不正确
#>数字或逻辑:返回NA
#>平均值警告。默认值(~“覆盖率等级”,na.rm=TRUE):参数不正确
#>数字或逻辑:返回NA
#>`summary()`解组输出(用`.groups`参数重写)
数据样本以平均值表示警告。默认值(~“防御等级”,na.rm=TRUE):参数不是数字
#>或者合乎逻辑:返回NA
#>平均值警告。默认值(~“防御等级”,na.rm=TRUE):参数不是数字
#>或者合乎逻辑:返回NA
#>`summary()`解组输出(用`.groups`参数重写)
#>平均值警告。默认值(~“处理等级”,na.rm=TRUE):参数不是数字
#>或者合乎逻辑:返回NA
#>平均值警告。默认值(~“处理等级”,na.rm=TRUE):参数不是数字
#>或者合乎逻辑:返回NA
#>`summary()`解组输出(用`.groups`参数重写)
#>平均值警告。默认值(~“覆盖率等级”,na.rm=TRUE):参数不正确
#>数字或逻辑:返回NA
#>平均值警告。默认值(~“覆盖率等级”,na.rm=TRUE):参数不正确
#>数字或逻辑:返回NA
#>`summary()`解组输出(用`.groups`参数重写)
这感觉像是一个非常简单的操作——从一个数据帧计算组平均值并将其绑定到另一个数据帧——这并不是我正在努力解决的问题。我想让我的函数自动遍历一系列参数。我希望能够快速地构建变量列表(或向量-我不打算使用列表),并将其作为参数传递给函数,以便它使用我提供给它的变量构建一个数据框架。但是我接受这样的观点:我在概念上有一些错误,我应该使用循环、purr、map等,或者改变我函数的编写方式?你的独立示例和你传递列表的函数之间的区别是——在独立示例中,你传递的是不带引号的变量(
get_avg2(Talk_Grade)
)然而,当传递向量/列表时,传递的是带引号的变量。(variable\u list你尝试过unlist
?你是什么意思?我应该在哪里尝试?你的函数在tidyverse中似乎是一种相当复杂的方式,就像基本函数ave
所做的那样。我从未使用过该函数,但它看起来像是专为处理因子而设计的,而我的分组类别是一个字符?会吗如果我只是将我的角色转换为因子并运行它,是否有效?@Spence\p是的。它应该直接与角色一起工作,尽管这是一个非常全面的答案。我肯定在概念上与NSE进行斗争。非常感谢!!!!!我认为使用Cross的最后一个解决方案可能有效,但“等级”变量..只有大约6个,我还有另外50多个列都有唯一类型的名称。所以我排除了使用带有样式的_。我可以用Cross()解决这个问题的另一种方法是什么?你可以用模式或任何特定的正则表达式传递列名。(以('Grade')结尾。
)或者你也可以将其作为列号传递,即cols我很抱歉打扰你,试图理解-所以我会在这个序列之前分配cols,然后在“Grade”现在的位置调用它?是的,所以cols
在之前分配,然后在跨中使用它,比如数据样本%>%groupby(Name)%>%summary(跨(cols,mean,na.rm=TRUE))
Wow,行得通!非常感谢!!我唯一的问题是分配“cols”时需要零索引。在这个例子中,当我试图设置cols时
get_avg2 <- function(v_name) {
avg <- "_Average"
data_1 <- PFF_College_Defense_data %>%
dplyr::group_by(Name) %>%
dplyr::summarise("{{ v_name }}_{avg}" := mean({{ v_name }}, na.rm = TRUE))
PFF_NCAA_Average_grades <- merge(PFF_NCAA_Average_grades, data_1, by = "Name")
return(PFF_NCAA_Average_grades)
}
v_names <- list("hits", "tackles", "forced_fumbles")
for (i in v_names) {
get_avg2(i)
}
#didn't work
PFF_NCAA_Average_grades <- purrr::map_df(v_names, get_avg2)
#didnt' work
PFF_NCAA_Average_grades <- get_avg2(hits)
PFF_NCAA_Average_grades <- get_avg2(tackles)
PFF_NCAA_Average_grades <- get_avg2(forced_fumbles)
library(tidyverse)
data_sample <- data.frame(
Name = c("Dalton Campbell", "Dalton Campbell", "Dalton Campbell", "Andre Walker", "Andre Walker", "Andre Walker"),
Defense_Grade = c(88, 86, 92, 94, 97, 95),
Tackle_Grade = c(66, 69, 72, 74, 76, 78),
Coverage_Grade = c(44, 43, 44, 76, 73, 78)
)
#Here I set up the dataframe which the function will bind to
data_sample_averages <- data_sample %>%
group_by(Name) %>%
dplyr::summarise(Defense_Grade_Average = mean(Defense_Grade))
#> `summarise()` ungrouping output (override with `.groups` argument)
#Function which computes average of variable (the only argument) and merges it back to data_sample_averages
get_avg2 <- function(v_name) {
avg <- "_Average"
data_1 <- data_sample %>%
dplyr::group_by(Name) %>%
dplyr::summarise("{{ v_name }}_{avg}" := mean({{ v_name }}, na.rm = TRUE))
data_sample_averages <- merge(data_sample_averages, data_1, by = "Name")
return(data_sample_averages)
}
#This works - it computers the average of Tackle_Grade and binds it to data_sample_averages
data_sample_averages <- get_avg2(Tackle_Grade)
#> `summarise()` ungrouping output (override with `.groups` argument)
#shows you the averages
print(data_sample_averages)
#> Name Defense_Grade_Average Tackle_Grade__Average
#> 1 Andre Walker 95.33333 76
#> 2 Dalton Campbell 88.66667 69
#Neither of these work - this is where I'm stuck
variable_list <- list("Defense_Grade", "Tackle_Grade", "Coverage Grade")
data_sample_averages <- lapply(variable_list, get_avg2)
#> Warning in mean.default(~"Defense_Grade", na.rm = TRUE): argument is not numeric
#> or logical: returning NA
#> Warning in mean.default(~"Defense_Grade", na.rm = TRUE): argument is not numeric
#> or logical: returning NA
#> `summarise()` ungrouping output (override with `.groups` argument)
#> Warning in mean.default(~"Tackle_Grade", na.rm = TRUE): argument is not numeric
#> or logical: returning NA
#> Warning in mean.default(~"Tackle_Grade", na.rm = TRUE): argument is not numeric
#> or logical: returning NA
#> `summarise()` ungrouping output (override with `.groups` argument)
#> Warning in mean.default(~"Coverage Grade", na.rm = TRUE): argument is not
#> numeric or logical: returning NA
#> Warning in mean.default(~"Coverage Grade", na.rm = TRUE): argument is not
#> numeric or logical: returning NA
#> `summarise()` ungrouping output (override with `.groups` argument)
data_sample_averages <- purrr::map(variable_list, get_avg2)
#> Warning in mean.default(~"Defense_Grade", na.rm = TRUE): argument is not numeric
#> or logical: returning NA
#> Warning in mean.default(~"Defense_Grade", na.rm = TRUE): argument is not numeric
#> or logical: returning NA
#> `summarise()` ungrouping output (override with `.groups` argument)
#> Warning in mean.default(~"Tackle_Grade", na.rm = TRUE): argument is not numeric
#> or logical: returning NA
#> Warning in mean.default(~"Tackle_Grade", na.rm = TRUE): argument is not numeric
#> or logical: returning NA
#> `summarise()` ungrouping output (override with `.groups` argument)
#> Warning in mean.default(~"Coverage Grade", na.rm = TRUE): argument is not
#> numeric or logical: returning NA
#> Warning in mean.default(~"Coverage Grade", na.rm = TRUE): argument is not
#> numeric or logical: returning NA
#> `summarise()` ungrouping output (override with `.groups` argument)
library(dplyr)
get_avg2 <- function(v_name) {
avg <- "_Average"
data_1 <- data_sample %>%
dplyr::group_by(Name) %>%
dplyr::summarise(!!paste0(v_name, avg):=mean(.data[[v_name]], na.rm = TRUE))
data_sample_averages <- merge(data_sample_averages, data_1, by = "Name")
return(data_sample_averages)
}
get_avg2("Tackle_Grade")
# Name Defense_Grade_Average Tackle_Grade_Average
#1 Andre Walker 95.33333 76
#2 Dalton Campbell 88.66667 69
variable_list <- c("Defense_Grade", "Tackle_Grade", "Coverage_Grade")
lapply(variable_list, get_avg2)
#[[1]]
# Name Defense_Grade_Average.x Defense_Grade_Average.y
#1 Andre Walker 95.33333 95.33333
#2 Dalton Campbell 88.66667 88.66667
#[[2]]
# Name Defense_Grade_Average Tackle_Grade_Average
#1 Andre Walker 95.33333 76
#2 Dalton Campbell 88.66667 69
#[[3]]
# Name Defense_Grade_Average Coverage_Grade_Average
#1 Andre Walker 95.33333 75.66667
#2 Dalton Campbell 88.66667 43.66667
data_sample %>%
group_by(Name) %>%
summarise(across(ends_with('Grade'), mean, na.rm = TRUE))
#. Name Defense_Grade Tackle_Grade Coverage_Grade
# <chr> <dbl> <dbl> <dbl>
#1 Andre Walker 95.3 76 75.7
#2 Dalton Campbell 88.7 69 43.7