matlab2018a中利用step在同一个figure中画出来的阶跃曲线如何合并在一起？ x'在matlab是什么意思
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> > X is equal to rand of 6.
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Thereisnoneedtomakeadifference
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>> X(2:4, [2, 3, 5])
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>>
按照书里面的程序画出来是两个分开的图，而书里面的结果是同一坐标下的两个曲线。是因为使用第二个step（）函数的前面，少加了一个命令，即 hold on。
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