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2.9.
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To
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understand
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why
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this
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error
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is
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occurring,
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let's
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examine
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the
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contents
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of
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the
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new
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annotation
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file
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we
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just
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tried
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to
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load.
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A
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partial
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screenshot
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of
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the
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file
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appears
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below
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as
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viewed
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in
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a
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Microsoft
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Excel
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2007
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window.
Notice that this file contains not only new subjects (IDs 6000 to 6002), but also some of the same subjects (i.e.,
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IDs
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3,
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5,
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and
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10)
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from
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the
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previously
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loaded
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file
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"subject_annotation_DC_Lung_Study_111210.csv".
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In
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addition,
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the
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values
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in
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the
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'Stratagene'
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field
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for
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these
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subjects
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are
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different
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in
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the
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new
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file
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than
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they
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were
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in
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the
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original
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file.
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This
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explains
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the
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'Value
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Already
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Loaded'
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error
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message
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which
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occurs
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when
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we
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attempt
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to
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load
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the
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file – this message is another way of saying that the file we're
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trying
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to
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load
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contains
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duplicates
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of
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subjects
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from
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previously
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loaded
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files.
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We've
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learned
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a
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valuable
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lesson
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from
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this
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exercise:
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when
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loading
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additional
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annotation
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data
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into
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an
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existing
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study,
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make
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sure
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that
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your
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annotation
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file
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doesn't
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contain
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any
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duplicates
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of
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existing
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subjects
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from
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previously
...
loaded
...
files.
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