How to create dummy variable?
2 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
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
1 Commento
Muthu Annamalai
il 17 Lug 2013
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 ?
Risposta accettata
Iain
il 17 Lug 2013
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
0 Commenti
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Interpolation in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!