Modify matrix, row vector

2017 12 7
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更新时间：2017 12 7
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I have 3 row vectors, which is defined as y1, y2 and y3. Their dimension is 1*166500. For y1, I want the first value to be zero, for y2, I want first 500 numbers to be zero and for y3, I want first 501 values to be zero, how do I do this? Thanks you!

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James Tursa
James Tursa 2017-12-7
编辑：James Tursa 2017-12-7
Are the "0 to 500" the values within y2 that you want to be set to 0? Or are you meaning for them to be indexes of y2 whose elements you want set to 0? Note that MATLAB uses 1-based indexing.
Anh Dao
Anh Dao 2017-12-7
编辑：Anh Dao 2017-12-7
I mean the index of y2 whose elements I want to set to 0, like for first 500 number within y, I want it to be zero. Thanks you!
Anh Dao
Anh Dao 2017-12-7
I'm such an idiot, I figured it out, it's y2(1, 1:500) = 0 , thanks you!

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Anh Dao
Anh Dao
2017-12-7

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Anh Dao
Anh Dao
2017-12-7

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