堆叠列表项 - 至少需要一个向量
stacking list items - at least one vector required
我有一个列表如下:
alist <- list(number1 = structure("something", .Dim = c(1L, 1L)), number2 = structure("something", .Dim = c(1L,
1L)))
如果我想堆叠这个列表:
stack(alist)
上面写着:Error in stack.default(test) : at least one vector element is required
为什么会发生这种情况,我该如何预防?
试试这个:
stack(unlist(alist))
我有一个列表如下:
alist <- list(number1 = structure("something", .Dim = c(1L, 1L)), number2 = structure("something", .Dim = c(1L,
1L)))
如果我想堆叠这个列表:
stack(alist)
上面写着:Error in stack.default(test) : at least one vector element is required
为什么会发生这种情况,我该如何预防?
试试这个:
stack(unlist(alist))