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Notes
for
Efficient
Data
Organization/Handling
Andrew
K.
Rose
Updated:
November
13,
2013
Precision
is
always
more
important
than
speed.
File
Folders
Each
project
should
have
a
directory
with
a
short
descriptive
name.
1.There
should
be
three
sub‐directories
off
that,
“Progs”
for
storage
of
programs
and
output;“Data”
for
raw
and
massaged
data
sets
and
“Docs”
for
documents
(paper
drafts,
slides,
readings,
notes,
etc.)
Data
Hard
disk
space
is
basically
free:
use
it!
Do
your
data
massaging
in
programmed
steps,
as
modular
as
possible.
That
way
if
you
make
a
mistake,
you
can
fix
the
program
and
then
regenerate
the
data
easily.
Each
excel
spreadsheet
should
have
a
“Read
Me”
sheet
at
the
outset.
This
should
list
the
original
sources
of
the
data,
including
URLs
and
the
date
things
were
originally
downloaded.
Also,
as
you
move
the
data
through
various
steps
(e.g.,
to
cut
out
data
headers,
change
variable
names
etc),
use
a
number
of
different
clearly
labeled
sheets
in
the
same
workbook
and
describe
the
steps
in
the
“Read
me”
sheet.
When
massaging
data,
leave
the
data
raw
in
at
least
one
easily
accessible
format.
For
instance,
if
you’re
handling
data
in
Excel,
leave
it
raw
in
one
sheet,
and
do
your
massaging
on
a
copy
of
that.
Never
do
something
by
hand
when
you
can
program
it.
Programs
can
be
replicated,
modified,
checked,
shared,
and
usually
take
less
time
to
do
something
with
far
greater
precision.
Always
leave
your
data
sets
as
raw
as
possible;
do
the
transformations
inside
the
program.
Check
your
data
sets
by
graphing
and
looking
for
outliers.
Look
for
outliers
through
descriptive
statistics
(e.g.,
look
for
stuff
that
lies
a
few
standard
errors
beyond
the
mean).
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