Descriptive statistics
Many comments are posted immidiately after or after 10 hours since the publication of news aricles. 
Patterns of discussion
Comments are split into equal-sized 10 groups to obtaine average Wordfish’s polarity scores for hierachical clustering. Clustering into 5 groups shows that there is a sustained dipression in pattern 2 and 4 and that there is a plunge followed by a jump in pattern 2 and 4. Pattern 5 looks random.
Note that only comments posted within 10 hours in groups 10 < n < 50 are included.
## Loading required package: Matrix

Comment patterns and news topics
Pattern 2 is high in topic 7 (芸能); pattern 4 is in topic 8 (ビジネス); pattern 1 is in topic 5 (世界経済), 2 (社会), 10 (外交), and pattern 3 is in 8 (ビジネス). Pattern 5 is evenly distributed arcoss topics.
##
## 1 2 3 4 5
## 1 16 17 12 7 6
## 2 10 9 6 2 2
## 3 42 63 30 24 27
## 4 7 9 3 3 3
## 5 20 16 7 5 7
## 6 9 10 4 3 2
## 7 3 10 1 4 2
## 8 3 4 6 5 2
## 9 21 34 10 14 12
## 10 31 22 19 15 5
##
## 1 2 3 4 5
## 1 0.27586207 0.29310345 0.20689655 0.12068966 0.10344828
## 2 0.34482759 0.31034483 0.20689655 0.06896552 0.06896552
## 3 0.22580645 0.33870968 0.16129032 0.12903226 0.14516129
## 4 0.28000000 0.36000000 0.12000000 0.12000000 0.12000000
## 5 0.36363636 0.29090909 0.12727273 0.09090909 0.12727273
## 6 0.32142857 0.35714286 0.14285714 0.10714286 0.07142857
## 7 0.15000000 0.50000000 0.05000000 0.20000000 0.10000000
## 8 0.15000000 0.20000000 0.30000000 0.25000000 0.10000000
## 9 0.23076923 0.37362637 0.10989011 0.15384615 0.13186813
## 10 0.33695652 0.23913043 0.20652174 0.16304348 0.05434783
## Topic 1 Topic 2 Topic 3 Topic 4 Topic 5 Topic 6
## [1,] "ツアー" "韓国" "北朝鮮" "アルバム" "韓国" "映画"
## [2,] "アンダー" "ウォン" "ミサイル" "ファン" "中国" "日本"
## [3,] "女子" "サムスン" "発射" "韓国" "日本" "思い"
## [4,] "通算" "会長" "韓国" "デビュー" "市場" "韓国"
## [5,] "タイ" "ソウル" "米国" "日本" "企業" "監督"
## [6,] "ゴルフ" "販売" "実験" "メンバー" "経済" "ドラマ"
## [7,] "打差" "受け" "弾道" "グループ" "外国" "感じ"
## [8,] "最終" "警察" "中国" "ステージ" "ドル" "公開"
## [9,] "賞金" "情報" "大統領" "公演" "世界" "ゲーム"
## [10,] "プロ" "電子" "制裁" "ライブ" "自動車" "作品"
## [11,] "アン" "利用" "日本" "披露" "米国" "本当に"
## [12,] "ボギー" "ブランド" "トランプ" "音楽" "産業" "ファン"
## [13,] "日本" "発表" "会談" "会場" "調査" "思う"
## [14,] "バーディ" "会社" "挑発" "写真" "生産" "考え"
## [15,] "キム" "調査" "首相" "ツアー" "海外" "撮影"
## [16,] "今季" "容疑" "可能性" "ソロ" "投資" "世界"
## [17,] "オープン" "スマート" "対応" "one" "昨年" "時間"
## [18,] "出場" "サービス" "防衛" "発売" "高い" "今回"
## [19,] "プレー" "明らか" "icbm" "今回" "旅行" "感染"
## [20,] "オーバー" "被告" "ロシア" "リリース" "eu" "主演"
## Topic 7 Topic 8 Topic 9 Topic 10
## [1,] "韓国" "東芝" "韓国" "大統領"
## [2,] "ソン" "売却" "日本" "韓国"
## [3,] "キム" "日本" "選手" "問題"
## [4,] "写真" "航空" "代表" "政府"
## [5,] "プロフィール" "wd" "試合" "米国"
## [6,] "放送" "連合" "チーム" "日本"
## [7,] "ウズベキスタン" "交渉" "出場" "韓米"
## [8,] "伝え" "ハイ" "監督" "会談"
## [9,] "所属" "事業" "アジア" "トランプ"
## [10,] "事務所" "沖縄" "予選" "に対する"
## [11,] "出演" "契約" "最終" "政権"
## [12,] "ジョン" "韓国" "五輪" "首脳"
## [13,] "ミン" "空港" "リーグ" "合意"
## [14,] "ドラマ" "必要" "サッカー" "解決"
## [15,] "公開" "sk" "世界" "明らか"
## [16,] "結婚" "デジタル" "勝ち" "慰安"
## [17,] "チェ" "革新" "女子" "交渉"
## [18,] "番組" "メモリ" "対戦" "記者"
## [19,] "チョン" "メモリー" "イラン" "thaad"
## [20,] "ファン" "買収" "相手" "委員"
Comment patterns and news topics
Pattern 2 is high in topic 7 (芸能); pattern 4 is in topic 8 (ビジネス); pattern 1 is in topic 5 (世界経済), 2 (社会), 10 (外交), and pattern 3 is in 8 (ビジネス). Pattern 5 is evenly distributed arcoss topics.