Fsdb::Filter::dbrowdiff - compute row-by-row differences of some column River stage zero No dependents

For a given column, compute the differences between each row of the table. Differences are output to two new columns, "absdiff" and "pctdiff". Differences are either relative to the previous column (*incremental* mode), or relative to the first row (...

JOHNH/Fsdb-2.68 - 19 Sep 2019 15:23:50 GMT

Fsdb - a flat-text database for shell scripting River stage zero No dependents

JOHNH/Fsdb-2.68 - 19 Sep 2019 15:23:50 GMT

Fsdb::Filter::dbrowcount - count the number of rows in an Fsdb stream River stage zero No dependents

Count the number of rows and write out a new fsdb file with one column (n) and one value: the number of rows. This program is a strict subset of dbcolstats. Although there are other ways to get a count of rows ("dbcolstats", or "dbrowaccumulate -C 1"...

JOHNH/Fsdb-2.68 - 19 Sep 2019 15:23:50 GMT

Fsdb::Filter::dbcolstats - compute statistics on a fsdb column River stage zero No dependents

Compute statistics over a COLUMN of data. Records containing non-numeric data are considered null do not contribute to the stats (with the "-a" option they are treated as zeros). Confidence intervals are a t-test (+/- (t_{a/2})*s/sqrt(n)) and assume ...

JOHNH/Fsdb-2.68 - 19 Sep 2019 15:23:50 GMT

Fsdb::Filter::dbfilediff - compare two fsdb tables River stage zero No dependents

Dbfilediff compares two Fsdb tables, row by row. Unlike Unix diff(1), this program assumes the files are identical line-by-line and we compare fields. Thus, insertion of one extra row will result in all subsequent lines being marked different. By def...

JOHNH/Fsdb-2.68 - 19 Sep 2019 15:23:50 GMT

Fsdb::Filter::dbpipeline - allow db commands to be assembled as pipelines in Perl River stage zero No dependents

This module makes it easy to create pipelines in Perl using separate processes. (In the past we used to use perl threads.) By default (as with all Fsdb modules), input is from STDIN and output to STDOUT. Two helper functions, fromfile and tofile can ...

JOHNH/Fsdb-2.68 - 19 Sep 2019 15:23:50 GMT

Fsdb::Filter::dbcolmovingstats - compute moving statistics over a window of a column of data River stage zero No dependents

Compute moving statistics over a COLUMN of data. Records containing non-numeric data are considered null do not contribute to the stats (optionally they are treated as zeros with "-a"). Currently we compute mean and sample standard deviation. (Note w...

JOHNH/Fsdb-2.68 - 19 Sep 2019 15:23:50 GMT

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