Pre allocation in matlab
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v = [0 8 1 2 6 4 8]
How do I determine length of the vector?
Also, how do I pre-allocate the descending vector with all zeros?
Thank you!
采纳的回答
Walter Roberson
2020-2-10
0 个投票
length(v)
zeros(size(v))
3 个评论
Seoyoung Cho
2020-2-10
Seoyoung Cho
2020-2-10
Walter Roberson
2020-2-10
zeros(size(v)) works no matter whether you are planning to put ascending or descending variables; it also works even if you are planning to put complex numbers in (I mention those because complex numbers cannot generally be ordered into ascending or descending.)
更多回答（1 个）
fred ssemwogerere
2020-2-10
leng=length(v); % length of a vector
pA=zeros(1,leng); % pre-allocation with zeros
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