Question

我想在＆＃34; Delta = delta＆＃34;之间插入一个空白列。和＆＃34;卡= vars＆＃34;在下面的数据框中。我还想按照＆＃34; Model_Avg_Error＆＃34;列对输出进行排序。在数据框中也是如此。

df = data.frame(Card = vars, Model_Avg_Error = model_error, Forecast = forecasts,  Delta = delta, ,Card = vars, Model_Avg_Error = model_error, 
                Forecast = forecasts,  Delta = delta)

# save
write.csv(df, file = file.path(proj_path, "output.csv"), row.names = F)

这是从上面收到的错误：

data.frame出错（Card = vars，Model_Avg_Error = model_error，Forecast = forecast，：参数缺失，没有默认值

Answer 1

这是添加新的空白列的一般方法

library(dplyr)

# Adds after the second column
iris %>% add_column(new_col = NA, .after = 2)

# Adds after a specific column (in this case, after Sepal.Width)
iris %>% add_column(new_col = NA, .after = "Sepal.Width")

Answer 2

您可以使用以下代码添加空白栏，重新排序和排序：

df$blankVar <- NA #blank column 
df[c("Card", "blankVar", "Model_Avg_Error", "Forecast", "Delta")] #re-ordering columns by name
df[order(df$Model_Avg_Error),] #sorting by Model_Avg_Error

在数据框中插入空白列

2 个答案: