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    # Data Visualization - Will Lin {%hackmd yEJ_rTxzTWa2K450RqmT8w %} > 從這開始 HEAR 10% READ 20% SEE 80% ### Data Visualization 資料視覺化 vs InfoGraphics 資訊圖表 - 共同點:運用圖像化的方式簡化資訊 ### What make a good data visualization - Data 找出有用的資料 - Function 與使用者互動 - Design 選用哪種類型的圖表來呈現 ### Steps 前置步驟 #### Find the story 不同的角度去看資料,就像看電影一樣,要先想好劇本 例: 冰淇淋銷售,可能關心銷售、時間 關心的是——趨勢、關係、分布狀況(trend, correlation , outsider) #### Know your data Data Types: - Quantitative - Qualitative 不是這次所討論的範圍 - Categorical 代表不是一個值可能是區間、範圍、目錄 Data Relationships: - bar chart/column chart - time series 要看的是整體的趨勢 -> line chart - 關注的是某一種類型 -> pie chart - correlation 比較不同 category - Ranking 用bar chart 來做排序,比較容易看到資料的關係 - Distribution 資料分布 andrew abela ![](https://i.imgur.com/MWZhzsg.png) [Third Pillar Of Mapping Data To Visualizations: Usage](https://blog.qlik.com/third-pillar-of-mapping-data-to-visualizations-usage) 3 questions - 對於資料的了解程度 - 有什麼意義 - 要傳遞什麼事情 Data Cleaning & Aggregation #### Bar/Column Chart - 分成橫的、直的 - 不要放直的 label - bar 之間的空隙大會讓 bar 看起來太細 - 不要太多顏色 - 排序要有意義 #### Pie/Donut Chart(挖空的) - 人眼沒辦法分辨太小的差別 - 最清楚呈現資料比例 - 不要用太多 category,太小的就歸類為 others - 不要用太多 chart 作比較 - 在意比例,加起來要100% - 排序 #### Line/Area Chart - line 資料隨著時間變化的趨勢 - area 比較可以呈現加總的結果 - 把label放線的尾端 - 根據線起伏去設計 y 軸 - 不要太多線,不超過四條 - 不要使用虛線或其他有裝飾的線讓讀者分心 #### Scatter Plot/bubble Chart - 不同變數下的分佈 - 可以用 trend line,但也不要超過 2 條 #### Heat Map - 分好區間 ### Avoid - 避免對比色,選用相近色 - 3D chart - 陰影、裝飾 > 讓讀者專注 ###### tags: `MW19`

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