logspace with gap of half

Question

Megha 2019-1-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/438455-logspace-with-gap-of-half

评论： Megha 2019-1-6

采纳的回答： Stephen23

yt = logspace(-3,4,8);

This gives 0.001, 0.01, 0.1,1,10,100,1000,10000

However, I want

0.001, 0.005, 0.01,0.05, 0.1, 0.5, 1,5, 10,50, 100,500, 1000,5000, 10000

How Can i get that?

Can anyone help?

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Answer 1

Stephen23 2019-1-6

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/438455-logspace-with-gap-of-half#answer_355188

编辑：Stephen23 2019-1-6

>> V = logspace(-3,4,8);
>> V = [V;5*V];
>> V = V(1:end-1)
V =
       0.001       0.005       0.010       0.050       0.100       0.500       1.000       5.000      10.000      50.000     100.000     500.000    1000.000    5000.000   10000.000

Note that the values you requested are not evenly spaced in log-space (because the power difference between adjacent values alternates between ~0.30103 and ~0.69897). Evenly spaced values would simply be:

>> V = logspace(-3,4,15)
       0.0010000       0.0031623       0.0100000       0.0316228       0.1000000       0.3162278       1.0000000       3.1622777      10.0000000      31.6227766     100.0000000     316.2277660    1000.0000000    3162.2776602   10000.0000000

where the difference in powers between adjacent values is always exactly 0.5.