1NCRCAT(1) General Commands Manual NCRCAT(1)
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6 ncrcat - netCDF Record Concatenator
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9 ncrcat [-A] [-C] [-c] [-D dbg] [-d dim,[ min][,[ max]][,[ stride]]]
10 [-F] [-h] [-l path] [-n loop] [-O] [-p path] [-R] [-r] [-v var[,...]]
11 [-x] input-files output-file
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14 ncrcat concatenates record variables across an arbitrary number of
15 input files. The final record dimension is by default the sum of the
16 lengths of the record dimensions in the input files.
17 Input files may vary in size, but each must have a record dimension.
19 The record coordinate, if any, should be monotonic (or else non-fatal
20 warnings may be generated). Hyperslabs of the record dimension which
21 include more than one file are handled correctly. ncra supports the
22 stride argument to the -d hyperslab option for the record dimension
23 only, stride is not supported for non-record dimensions.
24 ncrcat applies special rules to ARM convention time fields (e.g.,
26 time_offset).
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29 Concatenate files 85.nc, 86.nc, 89.nc along the record dimension, and
30 store the results in 8589.nc:
31 ncrcat 85.nc 86.nc 87.nc 88.nc 89.nc 8589.nc
32 ncrcat 8[56789].nc 8589.nc
33 ncrcat -n 5,2,1 85.nc 8589.nc
34 These three methods produce identical answers.
35 Assume the files 85.nc, 86.nc, 89.nc each contain a record coordinate
37 time of length 12 defined such that the third record in 86.nc contains
38 data from March 1986, etc. NCO knows how to hyperslab the record
39 dimension across files. Thus, to concatenate data from December,
40 1985--February, 1986:
41 ncrcat -d time,11,13 85.nc 86.nc 87.nc 8512_8602.nc
42 ncrcat -F -d time,12,14 85.nc 86.nc 87.nc 8512_8602.nc
43 The file 87.nc is superfluous, but does not cause an error. The -F
44 turns on the Fortran (1-based) indexing convention.
45 The following uses the stride option to concatenate all the March tem‐
47 perature data from multiple input files into a single output file
48 ncrcat -F -d time,3,,12 -v temperature 85.nc 86.nc 87.nc
49 858687_03.nc
50 Assume the time coordinate is incrementally numbered such that January,
52 1985 = 1 and December, 1989 = 60. Assuming ?? only expands to the
53 five desired files, the following concatenates June, 1985--June, 1989:
54 ncrcat -d time,6.,54. ??.nc 8506_8906.nc
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58 NCO manual pages written by Charlie Zender and Brian Mays.
59
62 Report bugs to <http://sf.net/bugs/?group_id=3331>.
63
66 Copyright © 1995-2004 Charlie Zender
67 This is free software; see the source for copying conditions. There is
68 NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
69 PURPOSE.
70
73 The full documentation for NCO is maintained as a Texinfo manual called
74 the NCO User's Guide. Because NCO is mathematical in nature, the docu‐
75 mentation includes TeX-intensive portions not viewable on character-
76 based displays. Hence the only complete and authoritative versions of
77 the NCO User's Guide are the PDF (recommended), DVI, and Postscript
78 versions at <http://nco.sf.net/nco.pdf>, <http://nco.sf.net/nco.dvi>,
79 and <http://nco.sf.net/nco.ps>, respectively. HTML and XML versions
80 are available at <http://nco.sf.net/nco.html> and
81 <http://nco.sf.net/nco.xml>, respectively.
82 If the info and NCO programs are properly installed at your site, the
84 command
85 info nco
87 should give you access to the complete manual, except for the TeX-
89 intensive portions.
90
93 The NCO homepage at <http://nco.sf.net> contains more information.
94 NCRCAT(1)