This is nco.info, produced by gmakeinfo 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 © 1995-2026 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: 305591
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nco.info-5: 1201193

Tag Table:
(Indirect)
Node: Top1119
Node: Foreword2819
Node: Summary9062
Node: Introduction9869
Node: Availability10157
Ref: Availability-Footnote-112338
Node: How to Use This guide12750
Node: Compatability14565
Ref: Compatability-Footnote-120111
Ref: Compatability-Footnote-220259
Node: Windows Operating System20465
Ref: Windows Operating System-Footnote-123067
Node: Symbolic Links23308
Node: Libraries25324
Ref: Libraries-Footnote-126483
Node: netCDF2/3/4 and HDF4/5 Support26667
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-137664
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-237955
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-338321
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-438443
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-539524
Node: Help Requests and Bug Reports40018
Node: Strategies45227
Node: Philosophy45625
Node: Climate Model Paradigm47163
Node: Temporary Output Files47802
Ref: Temporary Output Files-Footnote-153022
Ref: Temporary Output Files-Footnote-253140
Node: Appending Variables53249
Ref: Appending Variables-Footnote-155342
Ref: Appending Variables-Footnote-255527
Node: Simple Arithmetic and Interpolation55684
Node: Statistics vs Concatenation56439
Ref: Statistics vs Concatenation-Footnote-157654
Ref: Statistics vs Concatenation-Footnote-257931
Node: Concatenation58318
Node: Averaging61994
Node: Interpolating63479
Node: Large Numbers of Files64007
Ref: Large Numbers of Files-Footnote-170004
Node: Large Datasets70340
Node: Memory Requirements73269
Node: Single and Multi-file Operators74720
Ref: Single and Multi-file Operators-Footnote-180509
Node: Memory for ncap280675
Node: Performance82167
Node: Shared features84166
Node: Internationalization85849
Node: Metadata Optimization86433
Node: OpenMP Threading88394
Node: Command Line Options92455
Ref: Command Line Options-Footnote-194952
Node: Truncating Long Options95245
Node: Multi-arguments96941
Ref: Multi-arguments-Footnote-1101526
Node: Sanitization of Input101823
Node: Specifying Input Files104494
Ref: Specifying Input Files-Footnote-1113929
Node: Specifying Output Files114274
Node: Remote storage116071
Ref: Remote storage-Footnote-1121720
Ref: Remote storage-Footnote-2121949
Ref: Remote storage-Footnote-3122303
Node: OPeNDAP122740
Ref: OPeNDAP-Footnote-1129155
Ref: OPeNDAP-Footnote-2129736
Ref: OPeNDAP-Footnote-3130206
Ref: OPeNDAP-Footnote-4130457
Ref: OPeNDAP-Footnote-5130849
Node: Retaining Retrieved Files131114
Node: File Formats and Conversion133378
Node: File Formats134577
Ref: File Formats-Footnote-1138859
Node: Determining File Format139051
Node: File Conversion142612
Ref: File Conversion-Footnote-1144388
Node: Autoconversion144631
Node: Zarr and NCZarr150576
Node: Large File Support154317
Ref: Large File Support-Footnote-1155860
Node: Subsetting Files155898
Ref: Subsetting Files-Footnote-1171504
Node: Subsetting Coordinate Variables171739
Node: Group Path Editing174951
Node: Flattening Groups177133
Node: Moving Groups182273
Ref: Moving Groups-Footnote-1184464
Node: Dismembering Files184653
Node: Checking CF-compliance192798
Ref: Checking CF-compliance-Footnote-1200178
Node: C and Fortran Index Conventions200334
Node: Hyperslabs202141
Node: Stride208922
Node: Record Appending212263
Node: Subcycle216065
Ref: Subcycle-Footnote-1220977
Node: Interleave221087
Node: Multislabs226529
Node: Wrapped Coordinates234481
Node: Auxiliary Coordinates237419
Node: Grid Generation244686
Ref: Grid Generation-Footnote-1272602
Ref: Grid Generation-Footnote-2273064
Node: Regridding273653
Node: Climatology and Bounds Support305591
Node: UDUnits Support309918
Node: Rebasing Time Coordinate319461
Node: Multiple Record Dimensions322518
Node: Missing Values324843
Ref: Missing Values-Footnote-1330779
Ref: Missing Values-Footnote-2331024
Node: Chunking331133
Ref: Chunking-Footnote-1350250
Node: Quantization Algorithms350500
Node: Compression353374
Ref: fgr:qnt_cr_dfl365928
Ref: fgr:qnt_cr_bz2374549
Ref: fgr:qnt_cr_zst377148
Ref: Compression-Footnote-1378186
Ref: Compression-Footnote-2378310
Ref: Compression-Footnote-3378398
Ref: Compression-Footnote-4378494
Ref: Compression-Footnote-5379057
Ref: Compression-Footnote-6379274
Node: Linear Packing379465
Node: Precision-Preserving Compression381014
Ref: Precision-Preserving Compression-Footnote-1408117
Ref: Precision-Preserving Compression-Footnote-2408487
Ref: Precision-Preserving Compression-Footnote-3408909
Ref: Precision-Preserving Compression-Footnote-4410028
Ref: Precision-Preserving Compression-Footnote-5411396
Node: Deflation411594
Node: MD5 digests413839
Node: Buffer sizes417816
Ref: Buffer sizes-Footnote-1419114
Node: RAM disks419238
Node: Unbuffered I/O424251
Node: Packed data425550
Ref: Packed data-Footnote-1433386
Ref: Packed data-Footnote-2433563
Node: Operation Types433790
Node: Type Conversion441510
Node: Automatic type conversion442776
Ref: Automatic type conversion-Footnote-1449586
Ref: Automatic type conversion-Footnote-2449609
Ref: Automatic type conversion-Footnote-3449802
Node: Promoting Single-precision to Double450006
Ref: Promoting Single-precision to Double-Footnote-1468919
Ref: Promoting Single-precision to Double-Footnote-2469384
Ref: Promoting Single-precision to Double-Footnote-3469877
Ref: Promoting Single-precision to Double-Footnote-4470177
Ref: Promoting Single-precision to Double-Footnote-5470282
Node: Manual type conversion470346
Node: Batch Mode471331
Node: Global Attribute Addition472492
Node: Global Attribute Deletion474985
Node: History Attribute476322
Ref: History Attribute-Footnote-1480463
Node: File List Attributes480712
Node: CF Conventions482516
Node: ARM Conventions498737
Node: Operator Version500852
Node: Reference Manual502010
Node: ncap2 netCDF Arithmetic Processor503144
Node: Syntax of ncap2 statements508902
Node: Expressions510274
Node: Dimensions517634
Node: Left hand casting519883
Node: Arrays and hyperslabs524728
Node: Attributes531156
Node: Value List534899
Node: Number literals536154
Node: if statement540107
Node: Print & String methods542331
Node: Missing values ncap2546586
Node: Methods and functions551672
Node: RAM variables558970
Node: Where statement560250
Node: Loops565573
Node: Include files566908
Node: Sort methods568132
Node: UDUnits script579489
Node: Vpointer583209
Node: Irregular grids587691
Node: Bilinear interpolation593220
Node: GSL special functions597470
Ref: GSL special functions-Footnote-1619820
Node: GSL interpolation621141
Node: GSL least-squares fitting623221
Node: GSL statistics627277
Node: GSL random number generation631050
Node: Examples ncap2635556
Node: Intrinsic mathematical methods643127
Ref: Intrinsic mathematical methods-Footnote-1648480
Ref: Intrinsic mathematical methods-Footnote-2649339
Node: Operator precedence and associativity649412
Node: ID Quoting651964
Node: make_bounds() function654505
Node: solar_zenith_angle function655749
Node: ncatted netCDF Attribute Editor657111
Ref: ncatted netCDF Attribute Editor-Footnote-1677816
Node: ncbo netCDF Binary Operator678897
Ref: ncbo netCDF Binary Operator-Footnote-1692722
Ref: ncbo netCDF Binary Operator-Footnote-2692911
Ref: ncbo netCDF Binary Operator-Footnote-3693271
Ref: ncbo netCDF Binary Operator-Footnote-4693331
Ref: ncbo netCDF Binary Operator-Footnote-5693403
Ref: ncbo netCDF Binary Operator-Footnote-6693609
Node: ncchecker netCDF Compliance Checker693966
Node: ncclimo netCDF Climatology Generator696030
Ref: ncclimo netCDF Climatology Generator-Footnote-1782972
Ref: ncclimo netCDF Climatology Generator-Footnote-2783383
Ref: ncclimo netCDF Climatology Generator-Footnote-3783650
Node: ncecat netCDF Ensemble Concatenator783960
Node: nces netCDF Ensemble Statistics793616
Ref: nces netCDF Ensemble Statistics-Footnote-1803784
Ref: nces netCDF Ensemble Statistics-Footnote-2804062
Node: ncflint netCDF File Interpolator804585
Node: ncks netCDF Kitchen Sink813457
Ref: ncks netCDF Kitchen Sink-Footnote-1892547
Ref: ncks netCDF Kitchen Sink-Footnote-2892865
Ref: ncks netCDF Kitchen Sink-Footnote-3893236
Node: Filters for ncks893351
Node: ncpdq netCDF Permute Dimensions Quickly909897
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-1931948
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-2932053
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-3932634
Node: ncra netCDF Record Averager932906
Node: ncrcat netCDF Record Concatenator944115
Node: ncremap netCDF Remapper948754
Ref: ncremap netCDF Remapper-Footnote-11102294
Ref: ncremap netCDF Remapper-Footnote-21102705
Ref: ncremap netCDF Remapper-Footnote-31102788
Ref: ncremap netCDF Remapper-Footnote-41102930
Ref: ncremap netCDF Remapper-Footnote-51103210
Ref: ncremap netCDF Remapper-Footnote-61103677
Ref: ncremap netCDF Remapper-Footnote-71103963
Node: ncrename netCDF Renamer1104037
Node: ncwa netCDF Weighted Averager1123777
Ref: ncwa netCDF Weighted Averager-Footnote-11129237
Ref: ncwa netCDF Weighted Averager-Footnote-21129378
Node: Mask condition1129584
Ref: Mask condition-Footnote-11131059
Node: Normalization and Integration1131259
Ref: Normalization and Integration-Footnote-11137064
Ref: Normalization and Integration-Footnote-21137138
Ref: Normalization and Integration-Footnote-31137262
Node: Contributing1137431
Ref: Contributing-Footnote-11138166
Node: Contributors1138580
Node: Citation1143130
Node: Proposals for Institutional Funding1144496
Node: Quick Start1145671
Node: Daily data in one file1146148
Node: Monthly data in one file1147570
Node: One time point one file1149240
Node: Multiple files with multiple time points1150197
Node: CMIP5 Example1150689
Node: Combine Files1153425
Node: Global Distribution of Long-term Average1162879
Ref: fgr:glb1163115
Node: Annual Average over Regions1167891
Ref: fgr:anl1168101
Node: Monthly Cycle1180999
Ref: fgr:mon1181158
Node: Regrid MODIS Data1188223
Node: Add Coordinates to MODIS Data1195783
Node: Permute MODIS Coordinates1197785
Node: Parallel1199722
Node: CCSM Example1201193
Node: mybibnode1213878
Ref: ZeM071214003
Ref: Zen081214234
Ref: WZJ071214442
Ref: ZMW061214828
Ref: ZeW071215068
Ref: WZJ061215483
Ref: WZJ0731215673
Ref: WZJ0741216121
Ref: WZJ0811216323
Ref: WZJ0911216603
Ref: PFT881216821
Node: General Index1216948

End Tag Table


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