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List:       gnuplot-info
Subject:    [Gnuplot-info]  Print y-values at (local) extremes
From:       LukasP <LPr () pontex ! cz>
Date:       2009-10-16 13:06:54
Message-ID: 25925173.post () talk ! nabble ! com
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Hello,

is there a way GNUplot to write y-values at places where the y-value is a
(local) extreme?

- Let's have a datafile with x and y values:

# x y
1 5
2 6
3 8
4 4
8 11
10 10

Than the y(x) plot of these data will have local maximum at [2; 6] and [8;
11] and the local minimum at [4; 4].

And I'm looking for a way that GNUplot would write "6" and "11" above points
of local maximums and "4" above the local minimum.

Is it possible somehow?

- I know special cases should be solved - e.g. data:

0 5
2 6
3 6
4 6
5 2

It should be decided whether the [2; 6], [3; 6] and/or [4; 6] are extremes
as well; but this is not the main question.

Or, is it possible the datafile to contain a special mark at points where
the y-values are wanted to be written? E.g.:

# x y
1 5
2 6
3 8 # y
4 4 # Y
8 11 # y
10 10

Which should mean: when plotting - "# y" => "write the y-value above", "# Y"
=> "write the y-value bellow"?

See also the attachment for the wanted effect.

Thank you in advance.

Lukas
http://www.nabble.com/file/p25925173/Clipboard01.png Clipboard01.png 
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