This is nco.info, produced by makeinfo version 7.1 from nco.texi.

INFO-DIR-SECTION netCDF
START-INFO-DIR-ENTRY
* NCO::        User Guide for the netCDF Operator suite
END-INFO-DIR-ENTRY

This file documents NCO, a collection of utilities to manipulate and
analyze netCDF files.

   Copyright © 1995-2025 Charlie Zender

   This is the first edition of the ‘NCO User Guide’,
and is consistent with version 2 of ‘texinfo.tex’.

   Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.  The
license is available online at <http://www.gnu.org/copyleft/fdl.html>

   The original author of this software, Charlie Zender, wants to
improve it with the help of your suggestions, improvements, bug-reports,
and patches.
Charlie Zender <surname at uci dot edu> (yes, my surname is zender)
3200 Croul Hall
Department of Earth System Science
University of California, Irvine
Irvine, CA 92697-3100


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nco.info-2: 303222
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nco.info-4: 923673
nco.info-5: 1202079

Tag Table:
(Indirect)
Node: Top1118
Node: Foreword2820
Node: Summary7986
Node: Introduction8793
Node: Availability9081
Ref: Availability-Footnote-111262
Node: How to Use This guide11674
Node: Compatability13489
Ref: Compatability-Footnote-119035
Ref: Compatability-Footnote-219183
Node: Windows Operating System19389
Ref: Windows Operating System-Footnote-121991
Node: Symbolic Links22232
Node: Libraries24248
Ref: Libraries-Footnote-125407
Node: netCDF2/3/4 and HDF4/5 Support25591
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-136588
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-236879
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-337245
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-437367
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-538448
Node: Help Requests and Bug Reports38942
Node: Strategies43844
Node: Philosophy44242
Node: Climate Model Paradigm45780
Node: Temporary Output Files46419
Ref: Temporary Output Files-Footnote-151639
Ref: Temporary Output Files-Footnote-251757
Node: Appending Variables51866
Ref: Appending Variables-Footnote-153959
Ref: Appending Variables-Footnote-254144
Node: Simple Arithmetic and Interpolation54301
Node: Statistics vs Concatenation55056
Ref: Statistics vs Concatenation-Footnote-156271
Ref: Statistics vs Concatenation-Footnote-256548
Node: Concatenation56935
Node: Averaging60611
Node: Interpolating62096
Node: Large Numbers of Files62624
Ref: Large Numbers of Files-Footnote-168621
Node: Large Datasets68957
Node: Memory Requirements71886
Node: Single and Multi-file Operators73337
Ref: Single and Multi-file Operators-Footnote-179126
Node: Memory for ncap279292
Node: Performance80784
Node: Shared features82783
Node: Internationalization84436
Node: Metadata Optimization85020
Node: OpenMP Threading86981
Node: Command Line Options91042
Ref: Command Line Options-Footnote-193539
Node: Truncating Long Options93832
Node: Multi-arguments95528
Ref: Multi-arguments-Footnote-1100113
Node: Sanitization of Input100410
Node: Specifying Input Files103081
Ref: Specifying Input Files-Footnote-1112516
Node: Specifying Output Files112861
Node: Remote storage114658
Ref: Remote storage-Footnote-1120307
Ref: Remote storage-Footnote-2120536
Ref: Remote storage-Footnote-3120890
Node: OPeNDAP121327
Ref: OPeNDAP-Footnote-1127742
Ref: OPeNDAP-Footnote-2128323
Ref: OPeNDAP-Footnote-3128793
Ref: OPeNDAP-Footnote-4129044
Ref: OPeNDAP-Footnote-5129436
Node: Retaining Retrieved Files129701
Node: File Formats and Conversion131965
Node: File Formats133164
Ref: File Formats-Footnote-1137446
Node: Determining File Format137638
Node: File Conversion141199
Ref: File Conversion-Footnote-1142975
Node: Autoconversion143218
Node: Zarr and NCZarr149163
Node: Large File Support152904
Ref: Large File Support-Footnote-1154447
Node: Subsetting Files154485
Ref: Subsetting Files-Footnote-1170074
Node: Subsetting Coordinate Variables170309
Node: Group Path Editing173521
Node: Flattening Groups175703
Node: Moving Groups180843
Ref: Moving Groups-Footnote-1183034
Node: Dismembering Files183223
Node: Checking CF-compliance191368
Ref: Checking CF-compliance-Footnote-1198748
Node: C and Fortran Index Conventions198904
Node: Hyperslabs200711
Node: Stride207492
Node: Record Appending210833
Node: Subcycle214635
Ref: Subcycle-Footnote-1218616
Node: Interleave218726
Node: Multislabs224168
Node: Wrapped Coordinates232120
Node: Auxiliary Coordinates235058
Node: Grid Generation242318
Ref: Grid Generation-Footnote-1270234
Ref: Grid Generation-Footnote-2270696
Node: Regridding271285
Node: Climatology and Bounds Support303222
Node: UDUnits Support307549
Node: Rebasing Time Coordinate317092
Node: Multiple Record Dimensions320149
Node: Missing Values322474
Ref: Missing Values-Footnote-1328410
Ref: Missing Values-Footnote-2328655
Node: Chunking328764
Ref: Chunking-Footnote-1347408
Node: Quantization Algorithms347658
Node: Compression350532
Ref: fgr:qnt_cr_dfl363086
Ref: fgr:qnt_cr_bz2371687
Ref: fgr:qnt_cr_zst374286
Ref: Compression-Footnote-1375324
Ref: Compression-Footnote-2375448
Ref: Compression-Footnote-3375536
Ref: Compression-Footnote-4375632
Ref: Compression-Footnote-5376195
Ref: Compression-Footnote-6376412
Node: Linear Packing376603
Node: Precision-Preserving Compression378152
Ref: Precision-Preserving Compression-Footnote-1405255
Ref: Precision-Preserving Compression-Footnote-2405625
Ref: Precision-Preserving Compression-Footnote-3406047
Ref: Precision-Preserving Compression-Footnote-4407166
Ref: Precision-Preserving Compression-Footnote-5408534
Node: Deflation408732
Node: MD5 digests410977
Node: Buffer sizes414954
Ref: Buffer sizes-Footnote-1416252
Node: RAM disks416376
Node: Unbuffered I/O421389
Node: Packed data422688
Ref: Packed data-Footnote-1430462
Node: Operation Types430639
Node: Type Conversion438359
Node: Automatic type conversion439625
Ref: Automatic type conversion-Footnote-1446435
Ref: Automatic type conversion-Footnote-2446458
Ref: Automatic type conversion-Footnote-3446651
Node: Promoting Single-precision to Double446855
Ref: Promoting Single-precision to Double-Footnote-1465768
Ref: Promoting Single-precision to Double-Footnote-2466233
Ref: Promoting Single-precision to Double-Footnote-3466726
Ref: Promoting Single-precision to Double-Footnote-4467026
Ref: Promoting Single-precision to Double-Footnote-5467131
Node: Manual type conversion467195
Node: Batch Mode468180
Node: Global Attribute Addition469341
Node: History Attribute471860
Ref: History Attribute-Footnote-1475490
Node: File List Attributes475739
Node: CF Conventions477543
Node: ARM Conventions493694
Node: Operator Version495809
Node: Reference Manual496967
Node: ncap2 netCDF Arithmetic Processor498101
Node: Syntax of ncap2 statements503836
Node: Expressions505208
Node: Dimensions512568
Node: Left hand casting514817
Node: Arrays and hyperslabs519662
Node: Attributes526090
Node: Value List529850
Node: Number literals531105
Node: if statement535058
Node: Print & String methods537282
Node: Missing values ncap2541460
Node: Methods and functions546546
Node: RAM variables553838
Node: Where statement555118
Node: Loops560441
Node: Include files561776
Node: Sort methods563000
Node: UDUnits script574357
Node: Vpointer578077
Node: Irregular grids582543
Node: Bilinear interpolation588072
Node: GSL special functions592322
Ref: GSL special functions-Footnote-1614672
Node: GSL interpolation615992
Node: GSL least-squares fitting618072
Node: GSL statistics622128
Node: GSL random number generation625901
Node: Examples ncap2630407
Node: Intrinsic mathematical methods637978
Ref: Intrinsic mathematical methods-Footnote-1643331
Ref: Intrinsic mathematical methods-Footnote-2644190
Node: Operator precedence and associativity644263
Node: ID Quoting646815
Node: make_bounds() function649356
Node: solar_zenith_angle function650600
Node: ncatted netCDF Attribute Editor651962
Ref: ncatted netCDF Attribute Editor-Footnote-1672667
Node: ncbo netCDF Binary Operator673748
Ref: ncbo netCDF Binary Operator-Footnote-1687550
Ref: ncbo netCDF Binary Operator-Footnote-2687739
Ref: ncbo netCDF Binary Operator-Footnote-3688099
Ref: ncbo netCDF Binary Operator-Footnote-4688159
Ref: ncbo netCDF Binary Operator-Footnote-5688231
Ref: ncbo netCDF Binary Operator-Footnote-6688437
Node: ncchecker netCDF Compliance Checker688794
Node: ncclimo netCDF Climatology Generator690858
Ref: ncclimo netCDF Climatology Generator-Footnote-1778129
Ref: ncclimo netCDF Climatology Generator-Footnote-2778540
Ref: ncclimo netCDF Climatology Generator-Footnote-3778807
Node: ncecat netCDF Ensemble Concatenator779117
Node: nces netCDF Ensemble Statistics788755
Ref: nces netCDF Ensemble Statistics-Footnote-1798905
Ref: nces netCDF Ensemble Statistics-Footnote-2799183
Node: ncflint netCDF File Interpolator799706
Node: ncks netCDF Kitchen Sink808560
Ref: ncks netCDF Kitchen Sink-Footnote-1883482
Ref: ncks netCDF Kitchen Sink-Footnote-2883800
Ref: ncks netCDF Kitchen Sink-Footnote-3884171
Node: Filters for ncks884286
Node: ncpdq netCDF Permute Dimensions Quickly899564
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-1921597
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-2921702
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-3922283
Node: ncra netCDF Record Averager923673
Node: ncrcat netCDF Record Concatenator933632
Node: ncremap netCDF Remapper938253
Ref: ncremap netCDF Remapper-Footnote-11090678
Ref: ncremap netCDF Remapper-Footnote-21091089
Ref: ncremap netCDF Remapper-Footnote-31091172
Ref: ncremap netCDF Remapper-Footnote-41091314
Ref: ncremap netCDF Remapper-Footnote-51091640
Ref: ncremap netCDF Remapper-Footnote-61092107
Ref: ncremap netCDF Remapper-Footnote-71092393
Node: ncrename netCDF Renamer1092467
Node: ncwa netCDF Weighted Averager1109112
Ref: ncwa netCDF Weighted Averager-Footnote-11114549
Ref: ncwa netCDF Weighted Averager-Footnote-21114690
Node: Mask condition1114896
Ref: Mask condition-Footnote-11116371
Node: Normalization and Integration1116571
Ref: Normalization and Integration-Footnote-11122376
Ref: Normalization and Integration-Footnote-21122450
Ref: Normalization and Integration-Footnote-31122574
Node: Contributing1122743
Ref: Contributing-Footnote-11123478
Node: Contributors1123892
Node: Citation1128270
Node: Proposals for Institutional Funding1129636
Node: Quick Start1130811
Node: Daily data in one file1131288
Node: Monthly data in one file1132710
Node: One time point one file1134372
Node: Multiple files with multiple time points1135329
Node: CMIP5 Example1135821
Node: Combine Files1138557
Node: Global Distribution of Long-term Average1148011
Ref: fgr:glb1148247
Node: Annual Average over Regions1153023
Ref: fgr:anl1153233
Node: Monthly Cycle1166131
Ref: fgr:mon1166290
Node: Regrid MODIS Data1173355
Node: Add Coordinates to MODIS Data1180915
Node: Permute MODIS Coordinates1182917
Node: Parallel1184854
Node: CCSM Example1185206
Node: mybibnode1197891
Ref: ZeM071198016
Ref: Zen081198247
Ref: WZJ071198455
Ref: ZMW061198841
Ref: ZeW071199081
Ref: WZJ061199496
Ref: WZJ0731199686
Ref: WZJ0741200134
Ref: WZJ0811200336
Ref: WZJ0911200616
Ref: PFT881200834
Node: General Index1202079

End Tag Table


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