How do you use the NaN function?
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How would write a code that for a vector that is 500 data points long, but the first 123 data points are NaN?
回答（1 个）
Abdolkarim Mohammadi
2020-9-14
编辑：Abdolkarim Mohammadi
2020-9-14
You first create the NaN vector using nan(), then fill in the elements.
V = nan (500,1);
V (124:end) = Data;
4 个评论
Nicholas Deosaran
2020-9-14
Abdolkarim Mohammadi
2020-9-14
编辑：Abdolkarim Mohammadi
2020-9-14
The first line create the NaN vector and the second line fills it with your data. You may feel more comfortable with this syntax:
V (1:123) = NaN;
Nicholas Deosaran
2020-9-14
Abdolkarim Mohammadi
2020-9-14
No. If you have your vector of values for 125 to 500 and you want to transfer them to the new vector, then you should use:
V = nan (500,1);
V (124:end) = Data;
Otherwise, if you have a 500 element vector and you want to eliminate the first 125 elements, then you can do it in one command (not the one you mentinoed):
Data (1:123) = NaN;
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2020-9-14
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