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分享提取圖表數據的神器WebPlotDigitizer

LHB阿好伯, Jan 26, 2019

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  • The server hosting the image is unavailable
  • The image path is incorrect
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tags: 軟體 實驗

有時候在搜尋期刊文獻或是網路資料的時候看到一張圖表

多數情況是不會提供Raw Data的

若想獲得這個圖表的詳細數值或是重新繪製都是困難的

今天就來分享一個神器WebPlotDigitizer

可以對數據可視化的圖片進行反向工程以提取數值數據

  • 適用於各種圖表（XY，長條圖，極地圖，三元圖，地圖等…）
  • 自動提取可以輕鬆提取大量數據點
  • 免費使用，開源和跨平台（網頁和線軟體）
  • 可量測各式各樣的距離或角度

今天簡短的以網頁板本作介紹WebPlotDigitizer Online

首先先匯入圖片

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  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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選擇圖片類型(這次以簡單二為數據展示)

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  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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依照順序設定X1, X2, Y1, Y2

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  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
Learn More →

輸入X1, X2, Y1, Y2相對的數值

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  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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初步篩選建議以畫筆方式搭配顏色篩選將選定圖表資料

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  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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再以手動的方式進行資料點提取

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  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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篩選結束後就可以查看數據結果

Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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可以簡單設定有效位數之後選擇輸出格式

最酷的是可以輸出至Plotly中

Plotly是我們在R語言中常用的互動式圖表套件

Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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展示網址

官方介紹youtube影片

WebPlotDigitizer Tutorial 3.6+

Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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Dates in WebPlotDigitizer

Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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注意(使用需注意應用面向)

軟體是很好用

但畢竟是以反向工程取得的資料

一定會有一些偏差

使用時須多加注意精準度與準確度的影響

全文分享至

https://www.facebook.com/LHB0222/

有疑問想討論的都歡迎於下方留言

喜歡的幫我分享給所有的朋友 \o/

有所錯誤歡迎指教

Image Not Showing Possible Reasons
  • The image file may be corrupted
  • The server hosting the image is unavailable
  • The image path is incorrect
  • The image format is not supported
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阿好伯
分享自身所學到的一些東西 規劃主題應為6大類 1.Excel 2.統計軟體_R_SPSS 3.其他軟體使用心得 4.專業知識紀錄 5.好書分享 6.生活記事 希望有人喜歡，也幫助到更多人
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