This is nco.info, produced by makeinfo version 7.2 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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Tag Table:
(Indirect)
Node: Top1118
Node: Foreword2822
Node: Summary9065
Node: Introduction9872
Node: Availability10160
Ref: Availability-Footnote-112341
Node: How to Use This guide12753
Node: Compatability14568
Ref: Compatability-Footnote-120114
Ref: Compatability-Footnote-220262
Node: Windows Operating System20468
Ref: Windows Operating System-Footnote-123070
Node: Symbolic Links23311
Node: Libraries25327
Ref: Libraries-Footnote-126486
Node: netCDF2/3/4 and HDF4/5 Support26670
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-137667
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-237958
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-338324
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-438446
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-539527
Node: Help Requests and Bug Reports40021
Node: Strategies45230
Node: Philosophy45628
Node: Climate Model Paradigm47166
Node: Temporary Output Files47805
Ref: Temporary Output Files-Footnote-153025
Ref: Temporary Output Files-Footnote-253143
Node: Appending Variables53252
Ref: Appending Variables-Footnote-155345
Ref: Appending Variables-Footnote-255530
Node: Simple Arithmetic and Interpolation55687
Node: Statistics vs Concatenation56442
Ref: Statistics vs Concatenation-Footnote-157657
Ref: Statistics vs Concatenation-Footnote-257934
Node: Concatenation58321
Node: Averaging61997
Node: Interpolating63482
Node: Large Numbers of Files64010
Ref: Large Numbers of Files-Footnote-170007
Node: Large Datasets70343
Node: Memory Requirements73272
Node: Single and Multi-file Operators74723
Ref: Single and Multi-file Operators-Footnote-180512
Node: Memory for ncap280678
Node: Performance82170
Node: Shared features84169
Node: Internationalization85852
Node: Metadata Optimization86436
Node: OpenMP Threading88397
Node: Command Line Options92458
Ref: Command Line Options-Footnote-194955
Node: Truncating Long Options95248
Node: Multi-arguments96944
Ref: Multi-arguments-Footnote-1101529
Node: Sanitization of Input101826
Node: Specifying Input Files104497
Ref: Specifying Input Files-Footnote-1113932
Node: Specifying Output Files114277
Node: Remote storage116074
Ref: Remote storage-Footnote-1121723
Ref: Remote storage-Footnote-2121952
Ref: Remote storage-Footnote-3122306
Node: OPeNDAP122743
Ref: OPeNDAP-Footnote-1129158
Ref: OPeNDAP-Footnote-2129739
Ref: OPeNDAP-Footnote-3130209
Ref: OPeNDAP-Footnote-4130460
Ref: OPeNDAP-Footnote-5130852
Node: Retaining Retrieved Files131117
Node: File Formats and Conversion133381
Node: File Formats134580
Ref: File Formats-Footnote-1138862
Node: Determining File Format139054
Node: File Conversion142615
Ref: File Conversion-Footnote-1144391
Node: Autoconversion144634
Node: Zarr and NCZarr150579
Node: Large File Support154320
Ref: Large File Support-Footnote-1155863
Node: Subsetting Files155901
Ref: Subsetting Files-Footnote-1171507
Node: Subsetting Coordinate Variables171742
Node: Group Path Editing174954
Node: Flattening Groups177136
Node: Moving Groups182276
Ref: Moving Groups-Footnote-1184467
Node: Dismembering Files184656
Node: Checking CF-compliance192801
Ref: Checking CF-compliance-Footnote-1200181
Node: C and Fortran Index Conventions200337
Node: Hyperslabs202144
Node: Stride208925
Node: Record Appending212266
Node: Subcycle216068
Ref: Subcycle-Footnote-1220980
Node: Interleave221090
Node: Multislabs226532
Node: Wrapped Coordinates234484
Node: Auxiliary Coordinates237422
Node: Grid Generation244682
Ref: Grid Generation-Footnote-1272598
Ref: Grid Generation-Footnote-2273060
Node: Regridding273649
Node: Climatology and Bounds Support305586
Node: UDUnits Support309913
Node: Rebasing Time Coordinate319456
Node: Multiple Record Dimensions322513
Node: Missing Values324838
Ref: Missing Values-Footnote-1330774
Ref: Missing Values-Footnote-2331019
Node: Chunking331128
Ref: Chunking-Footnote-1349772
Node: Quantization Algorithms350022
Node: Compression352896
Ref: fgr:qnt_cr_dfl365450
Ref: fgr:qnt_cr_bz2374070
Ref: fgr:qnt_cr_zst376668
Ref: Compression-Footnote-1377705
Ref: Compression-Footnote-2377829
Ref: Compression-Footnote-3377917
Ref: Compression-Footnote-4378013
Ref: Compression-Footnote-5378576
Ref: Compression-Footnote-6378793
Node: Linear Packing378984
Node: Precision-Preserving Compression380533
Ref: Precision-Preserving Compression-Footnote-1407636
Ref: Precision-Preserving Compression-Footnote-2408006
Ref: Precision-Preserving Compression-Footnote-3408428
Ref: Precision-Preserving Compression-Footnote-4409547
Ref: Precision-Preserving Compression-Footnote-5410915
Node: Deflation411113
Node: MD5 digests413358
Node: Buffer sizes417335
Ref: Buffer sizes-Footnote-1418633
Node: RAM disks418757
Node: Unbuffered I/O423770
Node: Packed data425069
Ref: Packed data-Footnote-1432905
Ref: Packed data-Footnote-2433082
Node: Operation Types433309
Node: Type Conversion441029
Node: Automatic type conversion442295
Ref: Automatic type conversion-Footnote-1449105
Ref: Automatic type conversion-Footnote-2449128
Ref: Automatic type conversion-Footnote-3449321
Node: Promoting Single-precision to Double449525
Ref: Promoting Single-precision to Double-Footnote-1468438
Ref: Promoting Single-precision to Double-Footnote-2468903
Ref: Promoting Single-precision to Double-Footnote-3469396
Ref: Promoting Single-precision to Double-Footnote-4469696
Ref: Promoting Single-precision to Double-Footnote-5469801
Node: Manual type conversion469865
Node: Batch Mode470850
Node: Global Attribute Addition472011
Node: Global Attribute Deletion474504
Node: History Attribute475841
Ref: History Attribute-Footnote-1479982
Node: File List Attributes480231
Node: CF Conventions482035
Node: ARM Conventions498186
Node: Operator Version500301
Node: Reference Manual501459
Node: ncap2 netCDF Arithmetic Processor502593
Node: Syntax of ncap2 statements508351
Node: Expressions509723
Node: Dimensions517083
Node: Left hand casting519332
Node: Arrays and hyperslabs524177
Node: Attributes530605
Node: Value List534348
Node: Number literals535603
Node: if statement539556
Node: Print & String methods541780
Node: Missing values ncap2546035
Node: Methods and functions551121
Node: RAM variables558419
Node: Where statement559699
Node: Loops565022
Node: Include files566357
Node: Sort methods567581
Node: UDUnits script578938
Node: Vpointer582658
Node: Irregular grids587140
Node: Bilinear interpolation592669
Node: GSL special functions596919
Ref: GSL special functions-Footnote-1619268
Node: GSL interpolation620588
Node: GSL least-squares fitting622668
Node: GSL statistics626723
Node: GSL random number generation630496
Node: Examples ncap2635001
Node: Intrinsic mathematical methods642572
Ref: Intrinsic mathematical methods-Footnote-1647925
Ref: Intrinsic mathematical methods-Footnote-2648784
Node: Operator precedence and associativity648857
Node: ID Quoting651409
Node: make_bounds() function653950
Node: solar_zenith_angle function655194
Node: ncatted netCDF Attribute Editor656556
Ref: ncatted netCDF Attribute Editor-Footnote-1677261
Node: ncbo netCDF Binary Operator678342
Ref: ncbo netCDF Binary Operator-Footnote-1692167
Ref: ncbo netCDF Binary Operator-Footnote-2692356
Ref: ncbo netCDF Binary Operator-Footnote-3692716
Ref: ncbo netCDF Binary Operator-Footnote-4692776
Ref: ncbo netCDF Binary Operator-Footnote-5692848
Ref: ncbo netCDF Binary Operator-Footnote-6693054
Node: ncchecker netCDF Compliance Checker693411
Node: ncclimo netCDF Climatology Generator695475
Ref: ncclimo netCDF Climatology Generator-Footnote-1782749
Ref: ncclimo netCDF Climatology Generator-Footnote-2783160
Ref: ncclimo netCDF Climatology Generator-Footnote-3783427
Node: ncecat netCDF Ensemble Concatenator783737
Node: nces netCDF Ensemble Statistics793393
Ref: nces netCDF Ensemble Statistics-Footnote-1803561
Ref: nces netCDF Ensemble Statistics-Footnote-2803839
Node: ncflint netCDF File Interpolator804362
Node: ncks netCDF Kitchen Sink813234
Ref: ncks netCDF Kitchen Sink-Footnote-1892303
Ref: ncks netCDF Kitchen Sink-Footnote-2892621
Ref: ncks netCDF Kitchen Sink-Footnote-3892992
Node: Filters for ncks893107
Node: ncpdq netCDF Permute Dimensions Quickly909652
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-1931703
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-2931808
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-3932389
Node: ncra netCDF Record Averager932661
Node: ncrcat netCDF Record Concatenator943870
Node: ncremap netCDF Remapper948509
Ref: ncremap netCDF Remapper-Footnote-11101488
Ref: ncremap netCDF Remapper-Footnote-21101899
Ref: ncremap netCDF Remapper-Footnote-31101982
Ref: ncremap netCDF Remapper-Footnote-41102124
Ref: ncremap netCDF Remapper-Footnote-51102404
Ref: ncremap netCDF Remapper-Footnote-61102871
Ref: ncremap netCDF Remapper-Footnote-71103157
Node: ncrename netCDF Renamer1103231
Node: ncwa netCDF Weighted Averager1122971
Ref: ncwa netCDF Weighted Averager-Footnote-11128431
Ref: ncwa netCDF Weighted Averager-Footnote-21128572
Node: Mask condition1128778
Ref: Mask condition-Footnote-11130253
Node: Normalization and Integration1130453
Ref: Normalization and Integration-Footnote-11136258
Ref: Normalization and Integration-Footnote-21136332
Ref: Normalization and Integration-Footnote-31136456
Node: Contributing1136625
Ref: Contributing-Footnote-11137360
Node: Contributors1137774
Node: Citation1142179
Node: Proposals for Institutional Funding1143545
Node: Quick Start1144720
Node: Daily data in one file1145197
Node: Monthly data in one file1146619
Node: One time point one file1148289
Node: Multiple files with multiple time points1149246
Node: CMIP5 Example1149738
Node: Combine Files1152474
Node: Global Distribution of Long-term Average1161928
Ref: fgr:glb1162164
Node: Annual Average over Regions1166939
Ref: fgr:anl1167149
Node: Monthly Cycle1180046
Ref: fgr:mon1180205
Node: Regrid MODIS Data1187269
Node: Add Coordinates to MODIS Data1194829
Node: Permute MODIS Coordinates1196831
Node: Parallel1198768
Node: CCSM Example1199120
Node: mybibnode1212923
Ref: ZeM071213048
Ref: Zen081213279
Ref: WZJ071213487
Ref: ZMW061213873
Ref: ZeW071214113
Ref: WZJ061214528
Ref: WZJ0731214718
Ref: WZJ0741215166
Ref: WZJ0811215368
Ref: WZJ0911215648
Ref: PFT881215866
Node: General Index1215993

End Tag Table


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