x1=-5:0.01:5;x2=-5:0.01:5;
z1=3*x1+2*x2+3;
plot3（x1x2z1‘-b‘）grid?on
hold?on;
z2=x1-2*x2+1;
plot3（x1x2z2‘-b‘）grid?on
title（‘通信1421?學號:24?25?26‘）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-07-04?19:46??上交報告\
?????目錄???????????0??2016-07-02?20:31??上交報告\1\
?????目錄???????????0??2016-07-03?20:19??上交報告\10\
?????文件?????????345??2016-07-03?16:20??上交報告\10\untitled?（2）.m
?????文件????????1308??2016-07-03?15:15??上交報告\10\Untitled.m
?????文件?????????162??2016-07-02?16:17??上交報告\1\Untitled.m
?????目錄???????????0??2016-07-01?17:42??上交報告\2\
?????文件?????????105??2016-07-02?16:14??上交報告\2\Untitled2.m
?????文件??????????88??2016-07-01?17:42??上交報告\2\untitled3.m
?????目錄???????????0??2016-07-03?17:35??上交報告\3\
?????文件???????12888??2016-07-02?18:54??上交報告\3\untitled.slx
?????文件???????12258??2016-07-02?18:42??上交報告\3\untitled1.slx
?????文件???????12197??2016-07-02?18:42??上交報告\3\untitled2.slx
?????文件???????13298??2016-07-02?19:08??上交報告\3\untitled3.slx
?????文件???????12212??2016-07-02?19:17??上交報告\3\untitled4.slx
?????文件???????14162??2016-07-02?19:56??上交報告\3\untitled5.slx
?????文件???????12191??2016-07-03?17:35??上交報告\3\untitled6.slx
?????文件???????12994??2016-07-02?20:27??上交報告\3\untitled7.slx
?????文件???????12882??2016-07-02?20:31??上交報告\3\untitled8.slx
?????目錄???????????0??2016-07-04?10:59??上交報告\4\
?????文件?????????539??2016-07-03?20:07??上交報告\4\Untitled1.m
?????目錄???????????0??2016-07-03?20:05??上交報告\5\
?????文件???????13639??2016-07-03?20:05??上交報告\5\untitled.slx
?????目錄???????????0??2016-07-03?20:13??上交報告\6\
?????文件???????12312??2016-07-03?20:06??上交報告\6\untitled1.slx
?????目錄???????????0??2016-07-04?10:59??上交報告\7\
?????文件?????????440??2016-07-03?12:21??上交報告\7\Untitled3.m
?????目錄???????????0??2016-07-04?10:59??上交報告\8\
?????文件?????????311??2016-07-03?12:19??上交報告\8\Untitled.m
?????文件?????????366??2016-07-03?20:16??上交報告\8\Untitled1.m
?????目錄???????????0??2016-07-03?12:34??上交報告\9\
............此處省略2個文件信息