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tabstat - table column statistics
tabstat [parameter=value]
tabstat performs table statistics, much like tabhist without
graphical output but with multiple columns. It also contains an iterative
worst outlier removal.
The following parameters are recognized
in any order if the keyword is also given:
- in=
- Input file name (table)
[No default]
- xcol=
- x coordinate column(s) [1]
- iter=
- # iterations removing
worst outlier [0]
- nsigma=
- sigma-clipping: multiple sigma above which to
remove outliers. See also iter=. If 0 is specified, no sigma-clipping applied.
[0]
- verbose=
- Verbose output of all iterations? [t]
- width=
- Width of columns
to print []
- median=
- Compute median too? (can be time consuming) [t]
- method=
- Method to remove outliers (0=fast 1=slow) [0]
- nmax=
- maximum number of
data to be read if data file is a pipe [10000]
- bad=
- If given, this bad
value is ignored from the statistics
- robust=t|f
- Perform robust stats by
removing outliers. Only used if qac=t set. [f]
- qac=t|f
- Output information
in "QAC" format: mean, rms, min and max. If robust=t is choosen, the min/max
will still be the one of the original distribution.
tabhist(1NEMO)
http://vostat.org
A table of the numbers 1 through 100, their squares
and square roots is fed into tabstat and compute statistics for each column:
% nemoinp 1:100 | tabmath - - ’%1*%1,sqrt(%1)’ | tabstat - 1,2,3 width=10
npt: 100 100 100
min: 1 1 1
max: 100 10000 10
mean: 50.5 3383.5 6.71463
disp: 28.8661 3009.2 2.32675
skew: 0 0.633312 -0.538185
kurt: -1.20024 -0.863731 -0.669795
median: 50.5 2550.5 7.10625
Non-existent columns are not handled gracefully
Peter Teuben
24-Jan-00 doc written PJT
6-jun-01 V1.1 sigma -> nsigma PJT
1-dec-2021 V1.9 added qac/bad/robust PJT
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