How to remove five lines before every NaN in the vector?

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Hi everybody!
I am working with eye movements and currently analyzing some data from my experiments. I have a vector of data in Matlab which is indicating the position of the eye. After I imported the ASCII-file to the Matlab, I started to have some strange numbers before every NaN in the vector (I am attaching the file). How can I remove about 5 arrays before and after every NaN in the vector? These arrays I want to replace with NaNs again. I know that it should be really easy to do but my Matlab skills are not enough.
I will very grateful if somebody can help.
Thank you!

Answers (1)

Walter Roberson
Walter Roberson on 27 Apr 2020
NL = find(isnan(Data));
zap_at = unique(NL+(-5:5));
Data(zap_at) = nan;
Walter Roberson
Walter Roberson on 27 Apr 2020
yes Data is your vector.
NL is nan locations, the places that the nans are.
zap_at is the places to overwrite with nan.
The code assumes that some of the nan might be within 5 of each other and filters out the duplicates. You could probably get away without the unique() call.
The code as written relies on R2016b or later

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