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作者 godswd 在 PTT [ MATLAB ] 看板的留言(推文), 共11則

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[問題] 請問這是不是bug 該怎麼解決

[ MATLAB ]10 留言, 推噓總分: +3

作者: chen5 - 發表於 2012/11/26 17:41(13年前)

4^F推godswd:加括號也一樣啊，就像樓上講的是浮點數位數的問題11/26 20:14

5^F→godswd:『11/86400*86400』並不等於11.0000，因為預設只給你看四位11/26 20:15

6^F→godswd:你format long之後去看就知道了11/26 20:18

7^F→godswd:最簡單（偷懶）的解決方法就是在相減之前，用round把乘除的11/26 20:21

8^F→godswd:部分掛進去取最接近的整數，這樣答案應該就是你要的了11/26 20:22

[問題] sum(x_ff (:))

[ MATLAB ]5 留言, 推噓總分: +1

作者: Knoll - 發表於 2012/11/26 16:33(13年前)

1^F推godswd:sum (x_ff(:))就是把x_ff裡面所有的值作sum的動作11/26 16:55

2^F→godswd:x_ff(:) 就是把矩陣x_ff裡的所有元素列出冒號在這裡就是11/26 17:04

3^F→godswd:讓你選範圍用的，沒給值就是從開始到結尾，(1:3)就是第一個11/26 17:04

4^F→godswd:到第三個，詳細的用法你可以找本書或者google一下11/26 17:05

[討論] 圖如何畫精緻~

[ MATLAB ]3 留言, 推噓總分: +2

作者: yaohwei - 發表於 2012/11/14 14:14(13年前)

1^F推godswd:這圖是要顯示什麼東西啊? 平面作圖調個座標刻度(axis)、加11/14 15:22

2^F→godswd:個grid、box、legend、text之類的，看你要突顯的是什麼囉11/14 15:24

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