使用 jsonlite 将 JSON 数据转换为列表后,我最终得到如下列表之一。在这种情况下,第 10 个元素包含 9 列(始终固定)和 2 行(每次都不同)的列表。
mat <- lset$data$comments$data[10]
mat
[[1]]
id can_remove created_time from.id
1 10152663742099258_10152663749369258 TRUE 2014-07-01T11:10:29+0000 10203711779968366
2 10152663742099258_10152663842204258 TRUE 2014-07-01T12:15:57+0000 706804257
3 10152663742099258_10152663929639258 TRUE 2014-07-01T13:25:28+0000 10152738599744416
4 10152663742099258_10152663976344258 TRUE 2014-07-01T13:59:33+0000 706804257
from.name like_count
1 Aileen Yeow 1
2 Tejas Damania 0
3 Sandeep Kulkarni 1
4 Tejas Damania 0
message
1 Lame statement
2 Don't forget, people like you only because they don't know you! <ed><U+00A0><U+00BD><ed><U+00B8><U+00A1>
3 ...for a second I thought it's Accenture Singapore office with some new theme similar to its brand!
4 This is shanghai and nothing to do with firm I work for <ed><U+00A0><U+00BD><ed><U+00B8><U+008E>
user_likes
1 FALSE
2 FALSE
3 TRUE
4 FALSE
Whole mat 将我们显示为 [1] 的列表,如您所见,它包含列表(在列表中?)。当我打印 mat 时,它会显示如上所示的结构。
typeof(mat)
[1] "list"
substring(mat,1,100)
[1] "list(id = c(\"10152663742099258_10152663749369258\", \"10152663742099258_10152663842204258\", \"101526637"
我无法从中访问特定元素(比如消息)。我也无法将其转换为字符串矩阵,因此我可以以结构化方式访问元素。