Commit 7b4acf5c authored by Enrico Schumann's avatar Enrico Schumann

Remove sort example

Having unsorted files is bad practice.
parent 49e3a724
......@@ -115,7 +115,7 @@
* About tsdb
A terribly-simple data base for time series. All series
are saved as csv files. The package offers utilities
are saved as CSV files. The package offers utilities
for saving files in a standardised format, and for
retrieving and joining data.
......@@ -436,11 +436,16 @@ In read_ts_tables(c("example1", "example2"), dir = "~/tsdb/daily", :
(There may be other attributes as well, but these two
are always present.)
A =ts_table= are not meant as a time-series class. For
most computations (plotting, calculation of statistics,
etc), the =ts_table= must first be coerced to zoo, xts,
dataframe or a similar data structure.
** The file format
tsdb can store and load time-series data. The format it
uses is plain csv; a sample file my look as follows:
uses is plain CSV; a sample file my look as follows:
#+BEGIN_EXAMPLE
"timestamp","close"
......@@ -457,28 +462,13 @@ named =timestamp=.
The advantage of this plain format is that the data are
in no way dependent on =tsdb=. The files can be used
and manipulated by other software as well. For
instance, if the above example is is stored in an
appropriately named file =example=, we would reverse
the order of the timestamps in a shell such as =bash=.
#+BEGIN_SRC sh :results output
head -1 example; tail -n +2 example | sort -r
#+END_SRC
#+BEGIN_EXAMPLE
"timestamp","close"
17135,15
17134,14
17133,13
17132,12
17131,11
#+END_EXAMPLE
and manipulated by other software as well.
** Timestamps
:PROPERTIES:
:CUSTOM_ID: sec:timestamps
:END:
Daily timestamps are represented as the number of days
since 1 Jan 1970; intraday timestamps are the number of
seconds since 1 Jan 1970.
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