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skipping values in a datafile

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Date Wed, 31 May 2017 23:57:22 -0700 (PDT)
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Subject skipping values in a datafile
From "hugocoolens@gmail.com" <hugocoolens@gmail.com>
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I have a data file with measurements, each measurement has been repeated 5 times. However because of a bug in the apparatus software the first and the second measurement are always unreliable, therefore I want to skip them.
This is an example:
1 #unreliable
1.5 #unreliable
3 #reliable
3.1 #reliable
2.9 #reliable
#start of next 5 measurements:
3 #unreliable
3.1 #unreliable
3.5 #reliable
3.4 #reliable
3.6 #reliable

Can anyone here show me how to do is from within Gnuplot?

kind regards,
Hugo

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skipping values in a datafile "hugocoolens@gmail.com" <hugocoolens@gmail.com> - 2017-05-31 23:57 -0700

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