Rで解析：「gtrendsR」パッケージを利用したgifアニメーションの作成例

#gtrendsRパッケージがなければインストール
if(!require("gtrendsR", quietly = TRUE)){
  install.packages("gtrendsR");require("gtrendsR")
}
#tidyverseパッケージがなければインストール
if(!require("tidyverse", quietly = TRUE)){
  install.packages("tidyverse");require("tidyverse")
}
#gganimateパッケージがなければインストール
if(!require("gganimate", quietly = TRUE)){
  install.packages("gganimate");require("gganimate")
}

#Rでお遊び：何かに使えるかも？各都道府県を四角で表示！
#https://www.karada-good.net/analyticsr/r-597/
#日本地図にinterest_by_regionを表示
JpanMiniMap <- tibble(
  #都道府県名
  Pref = c("北海道", "青森県", "岩手県", "宮城県", "福島県", "茨城県", "千葉県", "秋田県", "山形県",
           "新潟県", "栃木県", "埼玉県", "東京都", "群馬県", "山梨県", "神奈川県", "富山県",
           "長野県", "静岡県", "石川県", "福井県", "岐阜県", "愛知県", "滋賀県", "三重県",
           "京都府", "奈良県", "和歌山県", "兵庫県", "大阪府", "鳥取県", "岡山県", "島根県",
           "広島県", "香川県", "徳島県", "愛媛県", "高知県", "山口県", "福岡県", "大分県",
           "宮崎県", "佐賀県", "熊本県", "鹿児島県", "長崎県", "沖縄県"),
  EPref = c("Hokkaido", "Aomori", "Iwate", "Miyagi", "Fukushima", "Ibaraki", "Chiba", "Akita", "Yamagata",
            "Niigata", "Tochigi", "Saitama", "Tokyo", "Gunma", "Yamanashi", "Kanagawa", "Toyama",
            "Nagano", "Shizuoka", "Ishikawa", "Fukui", "Gifu", "Aichi", "Shiga", "Mie",
            "Kyoto", "Nara", "Wakayama", "Hyogo", "Osaka", "Tottori", "Okayama", "Shimane",
            "Hiroshima", "Kagawa", "Tokushima", "Ehime", "Kochi", "Yamaguchi", "Fukuoka", "Oita",
            "Miyazaki", "Saga", "Kumamoto", "Kagoshima", "Nagasaki", "Okinawa"),
  #各都道府県の位置
  x = c(15.9, 15.5, 16, 16, 15.7, 15.7, 16, 15, 15, 14.7, 14.7, 15,
        15, 13.7, 14, 14, 12.7, 13, 13, 11.7, 11.7, 12, 12, 11, 11,
        10, 10, 10, 9, 9, 8, 8, 7, 7, 7.5, 7.5, 6.5, 6.5, 6, 4.5, 4.5,
        4.5, 3.5, 3.5, 3.5, 2.5, 2),
  y = c(12.9, 10.5, 9.5, 8.5, 7.5, 6.5, 5.5, 9.5, 8.5, 7.5, 6.5, 5.5,
        4.5, 6.5, 5.5, 4.5, 6.5, 5.5, 4.5, 7.5, 6.5, 5.5, 4.5, 5.5,
        4.5, 6, 5, 4, 5.5, 4.5, 6, 5, 6, 5, 3.5, 2.5, 3.5, 2.5, 5.5, 5, 4,
        3, 5, 4, 3, 5, 2),
  #widthとheightはタイルの大きさ
  width = c(2.5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
            1, 1, 1, 1, 1, 1),
  height = c(2.5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
             1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
             1, 1, 1, 1, 1, 1))

###プロットデータの作成#####
#空リスト
TrendListData <- list()
#取得データ期間
Time <- c("today 12-m", "today 3-m", "today 1-m")
#データを取得
for(i in seq(Time)){
  #gtrendsコマンド
  TrendListData[[i]] <- gtrends(keyword = c("鬼滅の刃"), geo = c("JP"),
                              time = Time[i], gprop = "web", category = 0) %>%
    #gterndsコマンド結果のリストから"interest_by_region"を抽出
    .[["interest_by_region"]] %>%
    #先頭にデータ期間を付与
    mutate(Date = Time[i], .before = location) %>%
    #locationの" Prefecture"を削除
    mutate(location = str_replace_all(location, pattern = " Prefecture",
                                      replacement = "")) %>%
    #hitsのNAを0に置換
    mutate(hits = replace_na(hits, 0)) %>%
    #必要なデータを選択
    select(Date, location, hits)
}

#結果を結合しhits以外をfactor化
TrendData <- tibble(bind_rows(TrendListData)) %>%
  #JpanMiniMap$EPrefの基準でlocationをfactor化
  mutate(EPref = factor(location, levels = JpanMiniMap$EPref),
         .keep = "unused", .before = hits) %>%
  #Timeの基準でDateをfactor化
  mutate(Date = factor(Date, levels = Time),
         .keep = "unused", .before = EPref) %>%
  #並び替え
  arrange(EPref)

#TrendDataをJpanMiniMapに結合
TrendData %>%
  inner_join(JpanMiniMap, by = "EPref") -> PlotData
########

#gifアニメーション作成のためにgganimateパッケージのtransition_statesコマンドを使う
AnimePlot <- ggplot(PlotData,
                    aes(x = x, y = y,
                        width = width, height = height)) +
  geom_tile(aes(fill = hits),
            color = "grey", show.legend = TRUE) +
  geom_text(aes(label = Pref), size = 6) +
  labs(title ="検索ワード[鬼滅の刃]_Before_{closest_state}_interest_by_region") +
  coord_fixed(ratio = 1) +
  scale_fill_distiller(palette = "Spectral", name = "hits") +
  theme_void() +
  transition_states(Date,
                    transition_length = 3,
                    state_length = 1,
                    wrap = FALSE)

#作業フォルダに保存
options(gganimate.dev_args = list(width = 800, height = 600))
anim_save("Gtrend.gif", AnimePlot, nframes = 50)