How to create dummy variable?
조회 수: 2 (최근 30일)
이전 댓글 표시
Hi all, I have a data matrix of dimension 100x5(time series) I have an outlier for the 75th value of the 4th column so I decide to construct a dummy variable for this outlier.
How can I do this?
Thanks in advance for your consideration and any help
댓글 수: 1
Muthu Annamalai
2013년 7월 17일
Your question is not clear enough.
Do you want to find NaN values from your data? isnan maybe something you are interested in, to help pick NaN from data.
What is a 'dummy variable' ? Do you want to replace,
A(75,4) = 0 ; %eliminate the outlier ?
채택된 답변
Iain
2013년 7월 17일
Use the mean of the two "surrounding" points
A(75,4) = A(74,4) + A(76,4);
Fit a curve to the known points, and then evaluate it at that point: (or interpolate...)
p = polyfit(times([1:74 76:end]),A([1:74 76:end],4),4); A(75,4) = polyval(p,times(75)); & That uses a 4th order polynomial
댓글 수: 0
추가 답변 (0개)
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!