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哈囉，你好:寫一個範例供你參考:>> y=log(x1)+x2^2 y = log(x1)+x2^2  >> diff(y,x1) ans = 1/x1  >> diff(y,x2) ans = 2*x2如果你看懂這個例子，應該就可以解決你的問題， give it a try...

你好 這首歌是 Give It To Me By Timbaland (ft...39; all night We ain't here to hurt nobody (So give it to me, give it to me, give it to me) ...

歌手：Auburn 歌名：Don't Give Up (THiiS Goes Out...) 圖片參考：http://ecx....

...family is " + this.familyName + ", but my given name is " + this.givenName + " , and my height...

... Lee - Sex Me Slow Don't Give Up - Auburn Dream You To Life - ...

http://hk.geocities.com/ give _u_up530/red1.ani http://hk.geocities.com/ give _u_up530/1.ani http://hk...http://hk.geocities.com/ give _u_up530/p2.ani http://hk.geocities.com/ give _u_up530/ran.ani 是挺累的 別忘記另外自行上傳哦~* 最後一個 三...

善用eval就可以了，如下 >> data=['o12o13up'] data = o12o13up >> eval([data '=[1 2 3]']) o12o13up = 1 2 3 2008-01-24 01:05:34 補充： >>k=1; >>eval([data,'(',num2str(k),')']) gives you o12o13up(1)

...return 0; r=rw(); putchar(c); return 1+r;} int main(int argc, char *argv[]) { printf(" Give me something and I will reverse it: "); rw(); putchar('\n'...