将所有列合并为一个而不保留colnames

Question

我有这种格式的数据框：

df <- structure(list(col1 = structure(1:2, .Label = c("text1", "text3"
), class = "factor"), col2 = structure(c(2L, 1L), .Label = c("text1", 
"text2"), class = "factor"), col3 = structure(c(1L, 1L), .Label = "text1", class = "factor"), 
    col4 = structure(1:2, .Label = c("text2", "text4"), class = "factor")), .Names = c("col1", 
"col2", "col3", "col4"), class = "data.frame", row.names = c(NA, 
-2L))

我想将所有列合并/合并为一个而不保留列名。

示例输出：

text1
text2
text1
text2
text3
text1
text1
text4

我找到了this示例，但它合并了行。

Answer 1

我们转置数据集，将其连接到vector并根据该数据创建data.frame

data.frame(newcol = c(t(df)), stringsAsFactors=FALSE)