
    *     14, 116
    @     43, 68, 79
         region specifier     79
         transformations 43
    @DDB transformation
         backward deormation  51
    @DDC transformation
         centered   51
    @DDF transformation
         forward derrmation   51
    @DIN transformation
         definite ineg   46
    @FAV transformation
         averaging fation     52
    @FLN transformation
         linear inteN transformation    52
    @LOC transformation
         location of     53
    @MIN transformation
         minimum vale    49
    @SBN transformation
         binomial   50
    @SBX transformation
         boxcar     49
    @SHF transformation
         shift data 49
    @SPZ transformation
         Parzen     50
    @SUM transformation
         unweighted ion  52
    @SWL transformation
         Welch 50
    @VAR transformation
         weighted vaiance     48
    @WEQ transformation
         weighted eq     53
    3-D
         WIRE  221
    abstract expression  2, 225
    abstract variable    5, 35
              account
         setting up an account     119
    action command  38
    algebraic expression 6, 38
    ALIAS 151, 158, 167, 183, 208, 216
    animations 83
         FRAME 167
         SET MOVIE  200
         viewing    84
    arguments (script)   13
    arrow
         text labels     98
    ASCII data
         accessing  26
         output     174
         reading    27
         ready 26
         SET DATA/EZ     186
    association     70
    attributes
         NetCDF attributes    130
         NetCDF global attributes  132
    average
         regridding @AVE 70
         transformation @AVE  48
    average transformation
         @AVE  48
    averaging filler
         @FAV transformation  52
    axis  2, 91, 225
         /DEFINE    63
         CANCEL     151
         DEFINE     159
         dynamic    67, 225
         Ferret controls 91
         label 96
         limits     91
         modulo     80
         NetCDF axis definitions   131
         PPLUS commands  92
         reversed   140
         SET modulo      184
         transformation  43
    backward derivative
         @DDB transformation  51
    bar charts 10
    batch 86
    binary
         record structure     24
    binary data
         output     174
         reading    27
         record structure     186
         SET DATA/EZ     186
    binomial smoother
         @SBN transformation  50
    bold  11
    boxcar smoother
         @SBX transformation  49
    calendar   42, 78, 140, 160, 193
    CANCEL     151
         /ALL  152
    CANCEL ALIAS    151
    CANCEL AXIS     151
    CANCEL DATA
         /ALL  152
    CANCEL DATA_SET 151
    CANCEL EXPRESSION    152
    CANCEL LIST     152
         /ALL  152
         /APPEND    152
         /FILE 152
         /FORMAT    152
         /HEAD 152
         /PRECISION 153
    CANCEL MEMORY   153
         /ALL  153
         /PERMANENT 153
         /TEMPORARY 153
    CANCEL MODE     153
    CANCEL MOVIE    154
         /ALL  154
    CANCEL REGION   154
         /ALL  154
         /I/J/K/L   154
         /X/Y/Z/T   154
    CANCEL VARIABLE 154
         /ALL  154
    CANCEL VIEWPORT 155
    CANCEL WINDOW   155
         /ALL  155
    CDL file   129, 130
         advanced usage  137
         sample     141
         using 133
    child_axis
         NetCDF     138
    climatology     72, 140
    COARDS     127, 225
    color 98
         contouring 108
         custom control  99, 102
         Ferret controls 99, 101
         GO tools   11
         hard copy  124
         in HDF movie    85
         lines 99, 179
         palette    11, 18, 101, 157,
                    178, 206
         PPLUS commands  99, 102
         text  99
    color_thickness index     99, 109, 157
    command
         abbreviated syntax   8
         Commands Reference   151
         executing a Unix command  214
         list of common commands   7
         SHOW  209
         syntax     8
    command line
         Unix  3
    command line (Unix)  214
    conformability  39, 59
    context    225
    continent
         filled masses   10
         outlines   10
    CONTOUR    155
         /D    156
         /FILL 156
         /FRAME     156
         /I /J /K /L     155
         /KEY  156
         /LEVELS    156
         /LINE 156
         /NOKEY     156
         /NOLABELS  156
         /OVERLAY   156
         /PALETTE   157
         /PEN  157
         /SET_UP    157
         /TITLE     157
         /TRANSPOSE 157
         /X/Y/Z/T   155
         /XLIMITS   158
         /YLIMITS   158
         extrema    11
    contouring 108, 110
         CONTOUR    155
    coordinates
         interpolation   195
         SHOW GRID /W/Y/Z/T   211
         spacing, NetCDF 139
         underlying grid 63
         world 2
    COSINE (latitude)    44
    curl  51
    data
         ASCII 4
         CANCEL DATA_SET 151
         data set   21
         NetCDF     22
         SET DATA_SET    184
         SHOW SET   209
         STATISTICS 215
         TMAP-formatted  23
    data set   2, 21, 225
         examples   16
         EZ    226
         locating   17
         NetCDF     127
         save and restore     12
    DDB transformation
         backward derivmation 51
    DDC transformation
         centered   51
    DDF transformation
         forward derivaation  51
    debugging  16, 62, 195
    DEFINE     158
    DEFINE ALIAS    158
    DEFINE AXIS     158
         /DEPTH     159
         /FILE 160
         /FROM_DATA 160
         /MODULO    160
         /NAME 160
         /NPOINTS   160
         /T0   160
         /UNITS     161
         /X/Y/Z/T   159
    DEFINE GRID     161
         /FILE 162
         /LIKE 162
         /X/Y/Z/T   161
    DEFINE REGION   163
         /DEFAULT   163
         /DI/DJ/DK/DL    163
         /DX/DY/DZ/DT    163
         /I/J/K/L   163
         /X/Y/Z/T   163
    DEFINE VARIABLE 164
         /D    164
         /QUIET     164
         /TITLE     165
         /UNITS     165
    DEFINE VIEWPORT 165
         /CLIP 165
         /ORIGIN    165
         /SIZE 165
         /TEXT 166
         /XLIMITS   166
         /YLIMITS   166
              definite integral
         @DIN transformation  46
    delta 79
    demonstrations  8
    density    42
    depth 11, 78, 159, 194
         DEFINE AXIS/DEPTH    159
    derivative 51
         transformations 43
    descriptor 23, 225
         locating   120
         TMAP data set   23
    digits     58
    dimensions
         multi-dimensional expression   39
         NetCDF     130
    DIN transformation
         definite integ  46
    divergence 51
    dynamic axis    225
    dynamic grid    225
    dynamic height  10
    e-mail     2
    ECHO  89
    ELIF  166
    ELSE
         conditional execution     166
         masking    56
    embedded expression  57, 114
    ENDIF 166
    environment
         computing environment     113,
                                   119
         environment variables     18,
                                   120
         setting up an account     119
    environment variable 120
    errors
         generating messages  14,
                              116
         MODE IGNORE_ERROR    195
    EXIT  167
         /COMMAND_FILE   167
         QUIT  167
    experimental design
         scattered sampling   217
    expression 2, 38, 226
         algebraic  6
         CANCEL     152
         embedded   57
         MODE POLISH     198
         SET default context  188
         SHOW  210
    extremum   11, 49, 71
    Faddpath   17
    Fapropos   17
    FAV transformation
         averaging filleon    52
    Fdata 17
    Fdescr     17
    Fenv  18
    FER_DATA   120
    FER_DESCR  120
    FER_DIR    120
    FER_DSETS  120
    FER_GO     120
    FER_GRIDS  120
    FER_PALETTE     120
    ferret_paths    120
    Fgo   18
    Fgrids     18
    Fhelp 18
    FILE  167
         alias for SET DATA/EZ     186
    FILL  167
         CONTOUR/FILL    156
    filler (missing value)    52
    filtering
         transformations 43
    flag (missing value) 36
    FLN transformation
         linear interpolransformation   52
    flow control (scripts)    15, 16, 166,
                              169, 195
    Fman  18
    font  103, 193
         Ferret controls 103
         PPLUS commands  104
    format
         /FORMAT qualifier    185, 190,
                              217
         data sets  185
         Ferret     23
         FORMAT qualifier     173
         HDF   83
         MODE ASCII_FONT 193
         MODE LATIT_LABEL     196
         MODE LONG_LABEL 197
         NetCDF     22
         numeric axis labels  92
         standardized data    21
         TMAP  23
         TMAP format     228
    formatting
         numerical output     58, 175, 190
         plots 91
    FORTRAN-formatted files   24
    forward derivative
         @DDF transformation  51
    Fpalette   18
    Fprint     122
    Fpurge     19
         Unix file naming     125
    FRAME 167
         /FILE=filename  168
         /FORMAT=format  168
         /FORMAT=GIF     168
         /FORMAT=HDF     168
    Fsort 19
         Unix  125
         Unix file naming     125
    Ftoc  19
    function   40
    GIF image  87
    GKS   226
         color map  98
         graphic metafile     122
         MODE METAFILE   197
         MODE SEGMENTS   198
    gksm2ps    124
    Glossary   225
    GO    168
         /HELP 169
         demonstration files  8
         files 8, 12
         files, as help  20
         tools 9
         Unix file naming     126
         writing tools   12
    GO File    226
    graphics
         /SET_UP    90
         hard copy  122
         memory     121
         MODE METAFILE   197
         output controls 90
         viewport   105
    graticule  10
    grid  2, 63, 226
         /DEFINE    63
         conformable     39
         default    187
         DEFINE     161
         DEFINE AXIS     158
         dynamic    64, 225
         grid box   226
         grid file  226
         regridding 68
         SET   189
         staggered  138
    gridding (point data)     12, 216
    gridfile
         searching  18, 120
         UD and DU  159
    GT
         locating files  120
    hard copy  122
         Fprint     122
         gksm2ps    124
         MODE  197
         monochrome devices   122
    HDF   83
    help
         demos 20
         HELP  169
         Unix on-line    19
         within Ferret   20
    histograms 10
    hyperslabs
         NetCDF     138
    IF
         conditional execution     169
         masking    56
    image 83, 87
    immediate mode  57, 114
    indefinite integral
         @IIN transformation  47
    initialization file  120
    insufficient memory  121
    integral   46, 47
         transformations 43
    interpolation   56
    isosurface 6, 53
         @LOC  53
         @WEQ  53
    isotherm
         locating   6
    Julian day 42
    label
         axis  96
         contour line    110
         Ferret controls 96
         LABEL 171
         MODE  193
         MODE ASCII_FONT 193
         MODE CALENDAR   193
         MODE DEPTH_LABEL     194
         MODE LATIT_LABEL     196
         MODE LONG_LABEL 197
         movable labels  93
         plot  93
         positioning with mouse    98
         PPLUS commands  93, 97
         with pointing arrow  98
    LABEL /NOUSER   172
    Lambert conformal projection   9
    land
         GO    10
         plot overlays   10
    latitude   77
    layout     11, 91, 105, 107, 115,
               125
    least squares   10
    LET   172
    levels (contour)     108
    line
         /LINE qualifier 
     99, 108, 156, 179, 206
         hard copy  124
         line styles     10, 99, 179
    linear interpolation filler
         @FLN transformation  52
    LIST  172
         /APPEND    173
         /D    173
         /FILE 173
         /FORMAT    173
         /HEAD 175
         /HEADING[=ENHANCED]  175
         /I /J /K /L     173
         /NOHEAD    175
         /ORDER     175
         /PRECISION=#    176
         /RIGID     176
         /SINGLY    176
         /TITLE="title string"     176
         /X /Y /Z /T     173
    LOAD  176
         /D    177
         /I/J/K/L   177
         /NAME 177
         /PERMANENT 177
         /TEMPORARY 177
         /X/Y/Z/T   177
    LOC transformation
         location of     53
    location transformation
         @LOC  53
    logo  11
    long_name
         NetCDF variable attributes     131
    longitude  77
    loop  15, 84
    masking    10, 45, 56
    matrix notation 27
    MAX transformation
         maximum value   49
    maximum    49, 71
    maximum value
         @MAX transformation  49
    MC data sets    23, 149
    memory
         CANCEL     153
         insufficient memory  121
         large calculations   194
         loading expressions into  176
         management 3, 121, 191, 194
         MODE SEGMENTS   198
         NetCDF     140
    Mercator projection  9
    MESSAGE    177
         /CONTINUE  177
         /QUIET     177
    metafile   226
         hard copy  122
         MODE METAFILE   197
         naming     125, 197
         translation     122
    MIN transformation
         minimum value   49
    minimum    49, 71
    minimum value
         @MIN transformation  49
    missing value flag   36, 42, 59,
                         202
    MODE
         SET MODE   192
         SHOW MODE  212
    MODE ASCII_FONT 193
    MODE CALENDAR   193
    MODE DEPTH_LABEL     194
    MODE DESPERATE  194
    MODE DIAGNOSTIC 195
    MODE IGNORE_ERROR    195
    MODE INTERPOLATE     195
    MODE JOURNAL    196
    MODE LATIT_LABEL     196
    MODE LONG_LABEL 197
    MODE METAFILE   197
    MODE POLISH     198
    MODE PPLLIST    198
    MODE REFRESH    198
    MODE SEGMENTS   198
    MODE STUPID     199
    MODE VERIFY     199
    MODE WAIT  200
    modes 12
    modulo     80
         axis  80, 140, 160, 227
         NetCDF     140
         regridding 72, 227
    modulo axis     227
    modulo regridding    227
    movies     83
         animations 83
    MPEG  87
    multiple axis plots  11
    naming
         Unix file naming     125
         variables  164
    ncdump     129
    ncgen 129, 133
    nearest neighbor filler
         @FNR transformation  52
    NetCDF     
     22, 37, 127, 174, 183, 216,
     225, 227
         accessing data with USE   216
         axis attributes 130
         axis definition 131
         CDL data initialization   132
         CDL files  130
         child_axis 138
         converting to   127
         dimensions 130
         global attributes    132
         grid_definition 138
         hyperslabs 138
         locating   120
         long_name  131
         modulo axes     140
         multi-file data sets 23,
                              149
         parent grid     138
         slab_max_index  139
         slab_min_index  139
         special axis interpretations   
                                        132
         staggered grids 138
         utilities  129
         variable attributes  130
         variables  130
    notation
         @ notation 79
    number of bad points
         @NBD transformation  51
    number of good points
         @NGD transformation  51
    objective analysis   12, 216
    on-line help    17-19
    operator   39, 227
    overlay    10
         /OVERLAY qualifier   
     156, 180, 206, 220, 222
         GO tools   10
    palette
         creation   11, 101
         locating files  18, 120
         PALETTE command 178
         restoring default    102
         testing    11
    parent grid
         NetCDF     138
    Parzen smoother
         @SPZ transformation  50
    pause
         MESSAGE    177
    PEN
         PPLUS commands  99
    PLOT  178
         /D    179
         /FRAME     179
         /I/J/K/L   179
         /LINE 179
         /NOLABELS  179
         /OVERLAY   180
         /SET_UP    180
         /SYMBOL    180
         /TITLE     180
         /TRANSPOSE 180
         /VS   180
         /X/Y/Z/T   179
         /XLIMITS   181
         /YLIMITS   181
         layout     11
    polar projections    11
    potential temperature     43
    PPLUS 89, 181
         /RESET     182
         MODE ASCII_FONT 193
    precision  58
    print 122
    printing
         hard copy  122
    projection
         equal area 9
         Lambert conformal    9
         Mercator   9
         polar stereographic  11
    pseudo-variable 34, 227
    qualifier  227
    QUIT
         alias for EXIT  182
    random numbers  42
    record structure
         file  24
    region     2, 76, 227
         CANCEL     154
         DEFINE     163
         named 79
         pre-defined     80
         save and restore     12
         SET   201
         SHOW  213
    region (irregular)   45
    regressions     10
    regrid     227
    regridding 3, 68, 227
         transformations 70
              relative version
         GO    168
         numbers    126
         Unix file naming     126
    REPEAT     182
         /I/J/K/L   182
         /X/Y/Z/T   182
    reserved names  164
    running unweighted sum
         @RSUM transformation 52
    sampling   12, 217
         scattered sampling   217
    SAVE
         alias for LIST/FORM=CDF   183
    SBN transformation
         binomial   50
    SBX transformation
         boxcar     49
    scatter plots   181
    scattered sampling   217
    scripts    8, 12
    section (vertical)   12
    segments
         MODE SEGMENTS   198
    SET   184
    SET AXIS   184
    SET DATA
         /EZ   186
         /EZ/COLUMNS     187
         /EZ/GRID   187
         /EZ/ORDER  187
         /EZ/SKIP   187
         /EZ/TITLE  188
         /EZ/VARIABLES   188
         /FORMAT    185
         /RESTORE   186
         /SAVE 186
    SET DATA_SET    184
    SET EXPRESSION  188
    SET GRID   189
         /RESTORE   189
         /SAVE 189
    SET LIST   189
         /APPEND    189
         /FILE 189
         /FORMAT    190
         /HEAD 191
         /PRECISION 191
    SET MEMORY 191
    SET MODE   192
         /LAST 192
         ASCII_FONT 192
         CALENDAR   192
         DEPTH_LABEL     192
         DESPERATE  192
         DIAGNOSTIC 192
         GUI   192
         IGNORE_ERROR    192
         INTERPOLATE     192
         JOURNAL    192
         LATIT_LABEL     192
         LONG_LABEL 192
         METAFILE   192
         POLISH     192
         PPLLIST    192
         REFRESH    192
         SEGMENT    192
         STUPID     192
         VERIFY     192
         WAIT  192
    SET MOVIE  200
         /COMPRESS  200
         /FILE 200
         /LASER     201
         /START     201
    SET REGION 201
         /DI/DJ/DK/DL    202
         /DX/DY/DZ/DY    202
         /I/J/K/L   201
         /X/Y/Z/T   201
    SET VARIABLE    202
         /BAD  202
         /GRID 202
         /TITLE     202
         /UNITS     203
    SET VIEWPORT    203
    SET WINDOW 203
         /ASPECT    204
         /CLEAR     204
         /LOCATION  204
         /NEW  205
         /SIZE 205
    setup
         /SET_UP    89
         setting up an account     119
    SHADE 205
         /D    205
         /FRAME     205
         /I/J/K/L   205
         /KEY  206
         /LEVELS    206
         /NOKEY     206
         /NOLABELS  206
         /OVERLAY   206
         /PALETTE   206
         /SET_UP    206
         /TITLE     207
         /TRANSPOSE 207
         /X/Y/Z/T   205
         /XLIMITS   207
         /YLIMITS   207
    shape (of variable)  59
    SHF transformation
         shift data 49
    shift transformation
         @SHF  49
    SHN transformation
         Hanning smoother     50
    SHOW  207
         /ALL  208
    SHOW ALIAS 208
    SHOW AXIS  208
         /ALL  208
    SHOW COMMANDS   209
    SHOW DATA
         /BRIEF     209
         /FILES     209
         /FULL 209
         /VARIABLES 210
    SHOW DATA_SET   209
    SHOW EXPRESSION 210
    SHOW GRID  210
         /ALL  211
         /I/J/K/L   211
         /X/Y/Z/T   211
    SHOW LIST  211
         /ALL  211
    SHOW MEMORY     211
         /ALL  212
         /FREE 212
         /PERMANENT 212
         /TEMPORARY 212
    SHOW MODE  212
         /ALL  212
    SHOW MOVIE 213
         /ALL  213
    SHOW QUERIES    213
    SHOW REGION     213
    SHOW TRANSFORM  213
         /ALL  213
    SHOW VARIABLES  213
         /ALL  214
         /DIAGNOSTIC     214
         /USER 214
    SHOW VIEWPORT   214
         /ALL  214
    SHOW WINDOWS    214
         /ALL  214
    sigma coordinate     9
    slab_max_index
         NetCDF     139
    slab_min_index
         NetCDF     139
    smoothing
         contour lines   110
         transformations 43, 45
    SPAWN 214
    special axis interpretations
         NetCDF     132
    SPZ transformation
         Parzen     50
              staggered grids
         NetCDF     138
    standard deviation   48
    state (equation of)  42
    state (Ferret state) 12, 189, 192
    STATISTICS 215
         /D    215
         /I/J/K/L   215
         /X/Y/Z/T   215
         BRIEF 216
    string     13, 113, 115
    subroutines (scripts)     15
    subscript  2, 228
    SUM transformation
         unweighted sum  52
    SWL transformation
         Welch 50
    symbol
         plot point symbols   9, 10,
                              180
         text  113
         text string as  115
    syntax     8
         abbreviated     8
         command    227
         filenames  126
         region     76
         regridding 68
         transformation  43
         variable   33, 43
    Tektronix
         MODE WAIT  200
    text  113, 115
         color 99
         font  103, 193
    three-dimensional plot
         WIRE  221
    time  42, 78, 140
    time axis
         MODE CALENDAR   193
    title
         /TITLE qualifier     180, 207,
                              220, 222
         data set   188
         defining variable title   165
         plot  93
         TITLE qualifier 157
    TMAP-formatted file  23, 228
    tools
         Unix tools 17
    tracer
         scattered  217
    transformation  5, 43, 228
         @DDB backward derivative  51
         @DDC centered derivative  51
         @DDF forward derivative   51
         @DIN definite integral    46
         @FAV averaging filler     52
         @FLN linear interpolation
          filler    52
         @FNR nearest neighbor filler   52
         @IIN indefinite integral  47
         @LOC location of     53
         @MAX maximum value   49
         @MIN minimum value   49
         @NBD number of bad points 51
         @NGD number of good points     51
         @RSUM running unweighted sum   52
         @SBN binomial smoother    50
         @SBX boxcar smoother 49
         @SHF shift data 49
         @SHN Hanning smoother     50
         @SPZ Parzen smoother 50
         @SUM unweighted sum  52
         @SWL Welch smoother  50
         @VAR weighted variance    48
         @WEQ weighted equal  53
         axis  5, 43
         examples   44
         general information  44
         regridding 70
         SHOW  44
    TS
         locating files  120
    tutorial   2, 9
    unformatted files    24
    units 161, 203
         axis  161
         in transformations   44
    Unix
         command line    3
         environment variables     18
         from Ferret     214
         setting up an account     119
         Unix tools 17
    unmapped windows     3
    unweighted sum
         @SUM transformation  52
         transformation @RSUM 52
         transformation @SUM  52
    USE   216
         SET DATA/FORMAT=CDF  185
    USER  216
    user's group    2
    utilities
         NetCDF utilities     129
         Unix tools 17
    VAR transformation
         weighted variance    48
    variable   2, 33, 225
         abstract   5, 35, 225
         conformable     39
         default    61
         DEFINE     164
         file  34, 226
         global     61
         local 61
         NetCDF     130
         pseudo     34, 227
         reserved names  164
         SET   202
         SET DATA_SET    184
         SHOW  213
         syntax     33
         user  35
         user-defined    37, 60, 154,
                         164
    variance
         regridding transform      70
         transformation @VAR  48
    VECTOR     219
         /ASPECTS   219
         /D    219
         /FRAME     219
         /I/J/K/L   219
         /LENGTH    220
         /NOLABELS  220
         /OVERLAY   220
         /PEN  220
         /SET_UP    220
         /TITLE     220
         /TRANSPOSE 221
         /X/Y/Z/T   219
         /XLIMITS   221
         /XSKIP     221
         /YLIMITS   221
         /YSKIP     221
    vectors
         special    10
    versions
         GO    168
         purging    19
         relative version numbers  126
         Unix file naming     125
    vertical profile
         example of reading file   30
    viewport   4, 105, 165
         advanced usage  107
         CANCEL     155
         pre-defined     106
         SET   203
         SHOW  214
    wait
         MESSAGE    177
    weighted equal
         @WEQ transformation  53
    weighted variance
         @VAR  48
    Welch smoother
         @SWL transformation  50
    WEQ transformation
         weighted equal  53
    window     229
         CANCEL     155
         SET   203
         SHOW  214
    windowing
         transformations 43
    windows
         size and shape  203
    WIRE  221
         /D    222
         /FRAME     222
         /I/J/K/L   222
         /NOLABEL   222
         /OVERLAY   222
         /SET_UP    222
         /TITLE     222
         /TRANSPOSE 222
         /VIEWPOINT 222
         /X/Y/Z/T   222
         /ZLIMITS   223
         /ZSCALE    223
         example    222
    wire frame 221
    world coordinate     2, 229
    World Wide Web  1, 87
    X  windows
         size and shape  203
    X Data Slice    84
    X windows
         backing store   198
         setting up an account     119
         unmapped   3
    X-Y plot
         PLOT  178
