R JSONlite:如何提取以下输出？

Question

请参阅下面的R代码，我正在使用JSONlite包从一个网站抓取数据：

>url <- "http://fantasy.premierleague.com/web/api/elements/"

>a<-fromJSON(paste0(url, 1))

>a

给出了以下输出：

$id
[1] 1

$photo
[1] "59936.jpg"

$web_name
[1] "Szczesny"

$event_explain
list()

$fixture_history
$fixture_history$all
list()

$fixture_history$summary
list()


$season_history
     [,1]      [,2]   [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13] [,14] [,15] [,16] [,17]

[1,] "2008/09" "0"    "0"  "0"  "0"  "0"  "0"  "0"  "0"  "0"   "0"   "0"   "0"   "0"   "0"   "45"  "0"  

[2,] "2009/10" "0"    "0"  "0"  "0"  "0"  "0"  "0"  "0"  "0"   "0"   "0"   "0"   "0"   "0"   "45"  "0"  

[3,] "2010/11" "1350" "0"  "0"  "6"  "19" "0"  "1"  "0"  "1"   "0"   "45"  "0"   "0"   "0"   "43"  "62" 

[4,] "2011/12" "3420" "0"  "0"  "13" "49" "0"  "1"  "0"  "2"   "0"   "82"  "8"   "469" "0"   "59"  "139"

[5,] "2012/13" "2250" "0"  "0"  "10" "24" "0"  "1"  "0"  "1"   "0"   "71"  "3"   "314" "0"   "53"  "102"

[6,] "2013/14" "3330" "0"  "0"  "16" "41" "0"  "1"  "0"  "2"   "0"   "113" "4"   "475" "194" "59"  "157"

[7,] "2014/15" "1498" "0"  "0"  "3"  "21" "0"  "0"  "0"  "1"   "0"   "44"  "0"   "172" "215" "52"  "47" 

现在我想把season_history数据作为一个数据框架或矩阵进行分析，如何去做呢？我想要一个带有标题的最终输出：

1.web_name

2.$season_history1,17

那就是: Szcezesny 47

Answer 1

我不确定我是否理解困难。会不会是：

as.data.frame(a$season.history)