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我正在從Twitter API中獲取數據。將數據從JSON對象轉換爲數據框並加載到數據倉庫。查找下面的輸入和代碼片段。將嵌套的JSON對象轉換爲R中的數據幀
我對R編程非常陌生。
stats_campaign.data <- content(stats_campaign.request)
print(stats_campaign.data)
O/P：
`{
"data_type": [ "stats" ],
"time_series_length": [ 1 ],
"data": [
{
"id": [ "XXXXX" ],
"id_data": [
{
"segment": {},
"metrics": {
"impressions": {},
"tweets_send": {},
"qualified_impressions": {},
"follows": {},
"app_clicks": {},
"retweets": {},
"likes": {},
"engagements": {},
"clicks": {},
"card_engagements": {},
"replies": {},
"url_clicks": {},
"carousel_swipes": {}
}
}
]
},
{
"id": [ "XXXX1" ],
"id_data": [
{
"segment": {},
"metrics": {
"impressions": {},
"tweets_send": {},
"qualified_impressions": {},
"follows": {},
"app_clicks": {},
"retweets": {},
"likes": {},
"engagements": {},
"clicks": {},
"card_engagements": {},
"replies": {},
"url_clicks": {},
"carousel_swipes": {}
}
}
]
},`
當我讀這個JSON值，
stats_json_file <- sprintf("P:/R Repos/R
Applications/TwitterAPIData/stats_test_data-%s.json", TODAY)
jsonlite::fromJSON(stats_json_file)
**Result :**
id id_data
1 5wcaz NULL
2 5ub2u NULL
3 5wb8x NULL
4 5wb1j NULL
5 5yqwj NULL
6 5pq5i NULL
7 5u197 NULL
8 5z2js NULL
9 6fqh0 333250, 4, 9, 19, 111, 3189, 3156, 5, 1091
10 5tvr1 NULL
11 5yqw4 NULL
12 5qqps NULL
13 5yqvw NULL
14 5ygom NULL
15 5nc88 NULL
16 5yg94 NULL
17 65t9e NULL
18 5peck NULL
19 63pg1 247283, 17, 22, 35, 297, 5514, 5450, 6, 2971
20 6cdvy 156705, 1, 2, 6, 112, 10933, 605, 170
From my JSON file I want Id and whole "metrics": {
"impressions": {},
"tweets_send": {},
"qualified_impressions": {},
"follows": {},
"app_clicks": {},
"retweets": {},
"likes": {},
"engagements": {},
"clicks": {},
"card_engagements": {},
"replies": {},
"url_clicks": {},
"carousel_swipes": {}
}
and convert to Data Frame to load into Data Base. Plzz Help..!
我如何解析這個JSON對象。我想檢索整個Metrics對象的Id &。然後想要轉換成數據框以加載到SQL表中。
讀書，我用下面的代碼的多個標識的&指標值，
`test <- list()
for(i in 1:len)
{ test <- unlist(stats_campaign.data$data[[i]])
print(test)}`
**Output:**
id
"5wcaz"
id
"5ub2u"
id
"5wb8x"
id
"5wb1j"
id
"5yqwj"
id
"5pq5i"
id
"5u197"
id
"5z2js"
id
"5tvr1"
id
"5yqw4"
id
"5qqps"
id
"5yqvw"
id
"5ygom"
id
"5nc88"
id
"5yg94"
id
"65t9e"
id
"5peck"
id id_data.metrics.impressions
"63pg1" "133227"
id_data.metrics.tweets_send id_data.metrics.follows
"10" "9"
id_data.metrics.retweets id_data.metrics.likes
"17" "96"
id_data.metrics.engagements id_data.metrics.clicks
"2165" "2134"
id_data.metrics.replies id_data.metrics.url_clicks
"5" "1204"
id id_data.metrics.impressions
"6cdvy" "176164"
id_data.metrics.tweets_send id_data.metrics.retweets
"2" "10"
id_data.metrics.likes id_data.metrics.engagements
"121" "9708"
id_data.metrics.clicks id_data.metrics.url_clicks
"620" "160"
在一個爲我所用列表或別的東西每次追加的價值，我怎麼能做到這一點..？ ？我正在使用正確的方法嗎？有沒有其他方法可以解析嵌套的JSON對象，並直接放入數據框..？
請幫助..！提前致謝..！
如果您的JSON在語法上有效，那麼在R中，您可以執行'jsonlite :: fromJSON（your_text）'。不過，你的括號似乎有一些問題。 – Gregor
這是我的JOSN FOrmat， –
好的，你的JSON現在是有效的。你可以在其上運行'jsonlite :: fromJSON（your_text）'並獲得有用的結果。你想要什麼？而不是顯示你*不需要的輸出，你能顯示你想要的輸出嗎？ – Gregor