matlab保留三位小数

在Matlab中，你可以使用vpa()函数来保留指定位数的小数。具体用法如下所示：

rn = 7.82134
rn = vpa(rn, 3)

这样，变量rn的值将被截取为7.821，保留了三位小数。\[1\]
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