作者查詢 / Renk
作者 Renk 在 PTT [ Statistics ] 看板的留言(推文), 共18則
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10F推:全部+10 破百降一分 or 全部+9 69加一分07/01 23:19
1F推:很感謝你的回答!!04/01 00:41
1F推:你可以自己算算看可能的組合有多少阿01/05 19:23
2F→:其實隨著時代在改變 樂器 表演方式都一直在改變 很難到極限01/05 19:23
3F推:不是抽樣 所以沒有分配吧06/25 23:55
3F推:不過如果是做研究的話 模型的設定應該要有其理論基礎 可以看06/15 22:00
4F→:看之前文獻是怎麼處理截距項的 應該不是能說丟就丟 說放就放06/15 22:01
5F→:通常都會保留截距項 不過不會著墨太多(甚至沒有)去解釋而已06/15 22:02
1F推:把X1設成兩個dummy再跟X2做交叉項?05/06 00:34
5F推:設兩個就好 設三個會有dummy trap05/06 23:06
1F推:stata直接會給出常數項吧 加了noconstant才會不加常數04/13 23:26
4F推:兩邊變數都取ln時 係數才可解釋為彈性 微分看看就清楚了04/10 23:55
5F→:把係數*10 就是X1上升10%時 y會上升的幅度(百分比)04/10 23:57
1F推:變數之間可能互相影響 要分隔開單個變數影響 可放交叉項 至於03/17 10:29
2F→:30個變數 誰要跟誰交叉 就夠煩啦 而且還要考慮線性重合之類的03/17 10:31
1F推:這樣設好像後來的x會把之前的蓋過 最後只剩下全部的mean11/05 13:56
2F→:先設n0=100 然後x改為x[i-n0+1,]的樣子11/05 13:59