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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nco.info-5: 1210657

Tag Table:
(Indirect)
Node: Top1118
Node: Foreword2817
Node: Summary7983
Node: Introduction8790
Node: Availability9078
Ref: Availability-Footnote-111259
Node: How to Use This guide11671
Node: Compatability13486
Ref: Compatability-Footnote-119032
Ref: Compatability-Footnote-219180
Node: Windows Operating System19386
Ref: Windows Operating System-Footnote-121988
Node: Symbolic Links22229
Node: Libraries24245
Ref: Libraries-Footnote-125404
Node: netCDF2/3/4 and HDF4/5 Support25588
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-136585
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-236876
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-337242
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-437364
Ref: netCDF2/3/4 and HDF4/5 Support-Footnote-538445
Node: Help Requests and Bug Reports38939
Node: Strategies44148
Node: Philosophy44546
Node: Climate Model Paradigm46084
Node: Temporary Output Files46723
Ref: Temporary Output Files-Footnote-151943
Ref: Temporary Output Files-Footnote-252061
Node: Appending Variables52170
Ref: Appending Variables-Footnote-154263
Ref: Appending Variables-Footnote-254448
Node: Simple Arithmetic and Interpolation54605
Node: Statistics vs Concatenation55360
Ref: Statistics vs Concatenation-Footnote-156575
Ref: Statistics vs Concatenation-Footnote-256852
Node: Concatenation57239
Node: Averaging60915
Node: Interpolating62400
Node: Large Numbers of Files62928
Ref: Large Numbers of Files-Footnote-168925
Node: Large Datasets69261
Node: Memory Requirements72190
Node: Single and Multi-file Operators73641
Ref: Single and Multi-file Operators-Footnote-179430
Node: Memory for ncap279596
Node: Performance81088
Node: Shared features83087
Node: Internationalization84770
Node: Metadata Optimization85354
Node: OpenMP Threading87315
Node: Command Line Options91376
Ref: Command Line Options-Footnote-193873
Node: Truncating Long Options94166
Node: Multi-arguments95862
Ref: Multi-arguments-Footnote-1100447
Node: Sanitization of Input100744
Node: Specifying Input Files103415
Ref: Specifying Input Files-Footnote-1112850
Node: Specifying Output Files113195
Node: Remote storage114992
Ref: Remote storage-Footnote-1120641
Ref: Remote storage-Footnote-2120870
Ref: Remote storage-Footnote-3121224
Node: OPeNDAP121661
Ref: OPeNDAP-Footnote-1128076
Ref: OPeNDAP-Footnote-2128657
Ref: OPeNDAP-Footnote-3129127
Ref: OPeNDAP-Footnote-4129378
Ref: OPeNDAP-Footnote-5129770
Node: Retaining Retrieved Files130035
Node: File Formats and Conversion132299
Node: File Formats133498
Ref: File Formats-Footnote-1137780
Node: Determining File Format137972
Node: File Conversion141533
Ref: File Conversion-Footnote-1143309
Node: Autoconversion143552
Node: Zarr and NCZarr149497
Node: Large File Support153238
Ref: Large File Support-Footnote-1154781
Node: Subsetting Files154819
Ref: Subsetting Files-Footnote-1170408
Node: Subsetting Coordinate Variables170643
Node: Group Path Editing173855
Node: Flattening Groups176037
Node: Moving Groups181177
Ref: Moving Groups-Footnote-1183368
Node: Dismembering Files183557
Node: Checking CF-compliance191702
Ref: Checking CF-compliance-Footnote-1199082
Node: C and Fortran Index Conventions199238
Node: Hyperslabs201045
Node: Stride207826
Node: Record Appending211167
Node: Subcycle214969
Ref: Subcycle-Footnote-1219881
Node: Interleave219991
Node: Multislabs225433
Node: Wrapped Coordinates233385
Node: Auxiliary Coordinates236323
Node: Grid Generation243583
Ref: Grid Generation-Footnote-1271499
Ref: Grid Generation-Footnote-2271961
Node: Regridding272550
Node: Climatology and Bounds Support304487
Node: UDUnits Support308814
Node: Rebasing Time Coordinate318357
Node: Multiple Record Dimensions321414
Node: Missing Values323739
Ref: Missing Values-Footnote-1329675
Ref: Missing Values-Footnote-2329920
Node: Chunking330029
Ref: Chunking-Footnote-1348673
Node: Quantization Algorithms348923
Node: Compression351797
Ref: fgr:qnt_cr_dfl364351
Ref: fgr:qnt_cr_bz2372951
Ref: fgr:qnt_cr_zst375549
Ref: Compression-Footnote-1376586
Ref: Compression-Footnote-2376710
Ref: Compression-Footnote-3376798
Ref: Compression-Footnote-4376894
Ref: Compression-Footnote-5377457
Ref: Compression-Footnote-6377674
Node: Linear Packing377865
Node: Precision-Preserving Compression379414
Ref: Precision-Preserving Compression-Footnote-1406517
Ref: Precision-Preserving Compression-Footnote-2406887
Ref: Precision-Preserving Compression-Footnote-3407309
Ref: Precision-Preserving Compression-Footnote-4408428
Ref: Precision-Preserving Compression-Footnote-5409796
Node: Deflation409994
Node: MD5 digests412239
Node: Buffer sizes416216
Ref: Buffer sizes-Footnote-1417514
Node: RAM disks417638
Node: Unbuffered I/O422651
Node: Packed data423950
Ref: Packed data-Footnote-1431786
Ref: Packed data-Footnote-2431963
Node: Operation Types432190
Node: Type Conversion439910
Node: Automatic type conversion441176
Ref: Automatic type conversion-Footnote-1447986
Ref: Automatic type conversion-Footnote-2448009
Ref: Automatic type conversion-Footnote-3448202
Node: Promoting Single-precision to Double448406
Ref: Promoting Single-precision to Double-Footnote-1467319
Ref: Promoting Single-precision to Double-Footnote-2467784
Ref: Promoting Single-precision to Double-Footnote-3468277
Ref: Promoting Single-precision to Double-Footnote-4468577
Ref: Promoting Single-precision to Double-Footnote-5468682
Node: Manual type conversion468746
Node: Batch Mode469731
Node: Global Attribute Addition470892
Node: Global Attribute Deletion473385
Node: History Attribute474722
Ref: History Attribute-Footnote-1478863
Node: File List Attributes479112
Node: CF Conventions480916
Node: ARM Conventions497067
Node: Operator Version499182
Node: Reference Manual500340
Node: ncap2 netCDF Arithmetic Processor501474
Node: Syntax of ncap2 statements507232
Node: Expressions508604
Node: Dimensions515964
Node: Left hand casting518213
Node: Arrays and hyperslabs523058
Node: Attributes529486
Node: Value List533229
Node: Number literals534484
Node: if statement538437
Node: Print & String methods540661
Node: Missing values ncap2544916
Node: Methods and functions550002
Node: RAM variables557300
Node: Where statement558580
Node: Loops563903
Node: Include files565238
Node: Sort methods566462
Node: UDUnits script577819
Node: Vpointer581539
Node: Irregular grids586021
Node: Bilinear interpolation591550
Node: GSL special functions595800
Ref: GSL special functions-Footnote-1618149
Node: GSL interpolation619469
Node: GSL least-squares fitting621549
Node: GSL statistics625604
Node: GSL random number generation629377
Node: Examples ncap2633882
Node: Intrinsic mathematical methods641453
Ref: Intrinsic mathematical methods-Footnote-1646806
Ref: Intrinsic mathematical methods-Footnote-2647665
Node: Operator precedence and associativity647738
Node: ID Quoting650290
Node: make_bounds() function652831
Node: solar_zenith_angle function654075
Node: ncatted netCDF Attribute Editor655437
Ref: ncatted netCDF Attribute Editor-Footnote-1676142
Node: ncbo netCDF Binary Operator677223
Ref: ncbo netCDF Binary Operator-Footnote-1691048
Ref: ncbo netCDF Binary Operator-Footnote-2691237
Ref: ncbo netCDF Binary Operator-Footnote-3691597
Ref: ncbo netCDF Binary Operator-Footnote-4691657
Ref: ncbo netCDF Binary Operator-Footnote-5691729
Ref: ncbo netCDF Binary Operator-Footnote-6691935
Node: ncchecker netCDF Compliance Checker692292
Node: ncclimo netCDF Climatology Generator694356
Ref: ncclimo netCDF Climatology Generator-Footnote-1781627
Ref: ncclimo netCDF Climatology Generator-Footnote-2782038
Ref: ncclimo netCDF Climatology Generator-Footnote-3782305
Node: ncecat netCDF Ensemble Concatenator782615
Node: nces netCDF Ensemble Statistics792271
Ref: nces netCDF Ensemble Statistics-Footnote-1802439
Ref: nces netCDF Ensemble Statistics-Footnote-2802717
Node: ncflint netCDF File Interpolator803240
Node: ncks netCDF Kitchen Sink812112
Ref: ncks netCDF Kitchen Sink-Footnote-1891181
Ref: ncks netCDF Kitchen Sink-Footnote-2891499
Ref: ncks netCDF Kitchen Sink-Footnote-3891870
Node: Filters for ncks891985
Node: ncpdq netCDF Permute Dimensions Quickly908528
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-1930579
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-2930684
Ref: ncpdq netCDF Permute Dimensions Quickly-Footnote-3931265
Node: ncra netCDF Record Averager931537
Node: ncrcat netCDF Record Concatenator942353
Node: ncremap netCDF Remapper946992
Ref: ncremap netCDF Remapper-Footnote-11099222
Ref: ncremap netCDF Remapper-Footnote-21099633
Ref: ncremap netCDF Remapper-Footnote-31099716
Ref: ncremap netCDF Remapper-Footnote-41099858
Ref: ncremap netCDF Remapper-Footnote-51100138
Ref: ncremap netCDF Remapper-Footnote-61100605
Ref: ncremap netCDF Remapper-Footnote-71100891
Node: ncrename netCDF Renamer1100965
Node: ncwa netCDF Weighted Averager1120705
Ref: ncwa netCDF Weighted Averager-Footnote-11126165
Ref: ncwa netCDF Weighted Averager-Footnote-21126306
Node: Mask condition1126512
Ref: Mask condition-Footnote-11127987
Node: Normalization and Integration1128187
Ref: Normalization and Integration-Footnote-11133992
Ref: Normalization and Integration-Footnote-21134066
Ref: Normalization and Integration-Footnote-31134190
Node: Contributing1134359
Ref: Contributing-Footnote-11135094
Node: Contributors1135508
Node: Citation1139913
Node: Proposals for Institutional Funding1141279
Node: Quick Start1142454
Node: Daily data in one file1142931
Node: Monthly data in one file1144353
Node: One time point one file1146023
Node: Multiple files with multiple time points1146980
Node: CMIP5 Example1147472
Node: Combine Files1150208
Node: Global Distribution of Long-term Average1159662
Ref: fgr:glb1159898
Node: Annual Average over Regions1164673
Ref: fgr:anl1164883
Node: Monthly Cycle1177780
Ref: fgr:mon1177939
Node: Regrid MODIS Data1185003
Node: Add Coordinates to MODIS Data1192563
Node: Permute MODIS Coordinates1194565
Node: Parallel1196502
Node: CCSM Example1196854
Node: mybibnode1210657
Ref: ZeM071210782
Ref: Zen081211013
Ref: WZJ071211221
Ref: ZMW061211607
Ref: ZeW071211847
Ref: WZJ061212262
Ref: WZJ0731212452
Ref: WZJ0741212900
Ref: WZJ0811213102
Ref: WZJ0911213382
Ref: PFT881213600
Node: General Index1213727

End Tag Table


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