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matlab如何控制数值精度
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% vpa函数，控制数值精度，a=3.14159......，取vpa(a,5)后，输出为3.1416 a=pi;
7 s+ |6 x n+ ?7 `vpa(a,5); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % round函数，将数据进行四舍五入 6 N; ]" n) |& f, \' v
2 Y: T1 \0 |3 ^6 W9 ]7 b9 p! ~2 }% yround(pi) %输出为3 round(-1.9) %输出为-2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 5 j+ z/ w6 b/ Q2 b; N2 o; Y5 I
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发表于 2019-1-11 08:30