OOCs (Object-Oriented Commands)

  1. Display contents (data & attributes) of NAO
  2. Set (change) these contents
  3. Write data to (netCDF) file

Display contents (data & attributes) of NAO (n-dimensional array object)

Default OOC 

% [nap "2 ** (0 .. 8)"]
1 2 4 8 16 32 ..
% [nap "2 ** (0 .. 8)"] -columns 8 -format %.1f
1.0 2.0 4.0 8.0 16.0 32.0 64.0 128.0 ..
% [nap "2 ** (0 .. 8)"] -columns -1; # -1 = infinity
1 2 4 8 16 32 64 128 256

Method value: Display all lines & columns 

% [nap "2 ** (0 .. 8)"] value
1 2 4 8 16 32 64 128 256
% [nap "2 ** (0 .. 8)"] v; # can abbreviate, provided unique
1 2 4 8 16 32 64 128 256

Method head 

% [nap "2 ** (0 .. 8)"] head
::NAP::233-233  f32  MissingValue: NaN  References: 0  Unit: (NULL)
Dimension 0   Size: 9      Name: (NULL)    Coordinate-variable: (NULL)

Method all 

% [nap "2 ** (0 .. 8)"] all
::NAP::242-242  f32  MissingValue: NaN  References: 0  Unit: (NULL)
Dimension 0   Size: 9      Name: (NULL)    Coordinate-variable: (NULL)
Value:
1 2 4 8 16 32 ..
% [nap "2 ** (0 .. 8)"] all -columns -1 -lines -1; # all columns & lines
::NAP::252-252  f32  MissingValue: NaN  References: 0  Unit: (NULL)
Dimension 0   Size: 9      Name: (NULL)    Coordinate-variable: (NULL)
Value:
1 2 4 8 16 32 64 128 256

Individual attributes 

% [nap "x = {{0 2.4 1}{3.6 2 -9}}"]
 0.0  2.4  1.0
 3.6  2.0 -9.0
% $x datatype
f64
% $x shape
2 3
% $x missing
NaN

Method set: Change these contents

Set missing value 

% [nap "sum(x)"]
3.6 4.4 -8
% $x set missing -9
% $x missing
-9
% $x 
0.0 2.4 1.0
3.6 2.0   _
% [nap "sum(x)"]
3.6 4.4 1
% $x set value "{-1 -3}" "1,{0 2}"; # Set x(1,0) = -1, x(1,2) = -3
% $x
 0.0  2.4  1.0
-1.0  2.0 -3.0

Set coordinate variable 

% nap "x = 999 ... -2p .. 2p"
::NAP::339-339
% $x all
::NAP::339-339  f64  MissingValue: NaN  References: 1  Unit: (NULL)
Dimension 0   Size: 999    Name: (NULL)    Coordinate-variable: (NULL)
Value:
-6.28319 -6.27059 -6.258 -6.24541 -6.23282 -6.22023 ..
% nap "y = sin x"
::NAP::341-341
% $y all
::NAP::341-341  f64  MissingValue: NaN  References: 1  Unit: (NULL)
Dimension 0   Size: 999    Name: (NULL)    Coordinate-variable: (NULL)
Value:
2.44921e-16 0.0125912 0.0251804 0.0377657 0.0503449 0.0629162 ..
% $y set coord x
% $y all
::NAP::341-341  f64  MissingValue: NaN  References: 1  Unit: (NULL)
Dimension 0   Size: 999    Name: x         Coordinate-variable: ::NAP::339-339
Value:
2.44921e-16 0.0125912 0.0251804 0.0377657 0.0503449 0.0629162 ..
% plot_nao y; # Display graph. Note that x axis corresponds to coordinate variable 'x'
.win0

Write data to (netCDF) file 

% $y netcdf test.nc sin; # write to variable "sin" in netCDF file "test.nc"

Author: Harvey Davies       © 2005, CSIRO Australia.       Legal Notice and Disclaimer
CVS Version Details: $Id: demo_ooc.html,v 1.2 2005/03/14 23:18:25 dav480 Exp $