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发表于 2016-3-22 09:42:33
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本帖最后由 xuebiz 于 2016-3-22 09:44 编辑
#第一部分
$ ncl
Copyright (C) 1995-2014 - All Rights Reserved
University Corporation for Atmospheric Research
NCAR Command Language Version 6.2.0
The use of this software is governed by a License Agreement.
See http://www.ncl.ucar.edu/ for more details.
ncl 0> f = addfile("hgt_2009_2012_monthly.nc", "r")
ncl 1> print(f)
Variable: f
Type: file
filename: hgt_2009_2012_monthly
path: hgt_2009_2012_monthly.nc
file global attributes:
dimensions:
time = 48
level = 12
lat = 37
lon = 144
variables:
short hgt ( time, level, lat, lon )
cell_methods : time: mean (montly from 6-hourly values)
standard_name : geopotential_height
parent_stat : Other
statistic : Individual Obs
level_desc : Pressure Levels
dataset : NCEP/DOE AMIP-II Reanalysis (Reanalysis-2) Monthly Avera
ges
var_desc : Geopotential height
GRIB_name : HGT
GRIB_id : 7
least_significant_digit : 0
precision : 0
_FillValue : -32767
missing_value : 32766
scale_factor : 1
add_offset : 31265
units : m
actual_range : ( -209, 32301 )
unpacked_valid_range : ( -1500, 35800 )
valid_range : ( -32765, 4534 )
long_name : Monthly Geopotential Heights on Pressure Levels
double time ( time )
bounds : time_bnds
coordinate_defines : start
axis : T
standard_name : time
prev_avg_period : 0000-00-01 00:00:00
avg_period : 0000-01-00 00:00:00
delta_t : 0000-01-00 00:00:00
actual_range : ( 1569072, 1866384 )
long_name : Time
units : hours since 1800-1-1 00:00:00
float level ( level )
coordinate_defines : point
axis : Z
GRIB_name : hPa
GRIB_id : 100
positive : down
long_name : Level
actual_range : ( 1000, 10 )
units : millibar
float lat ( lat )
coordinate_defines : point
axis : Y
standard_name : latitude
long_name : Latitude
actual_range : ( 90, 0 )
units : degrees_north
float lon ( lon )
coordinate_defines : point
axis : X
standard_name : longitude
actual_range : ( 0, 357.5 )
long_name : Longitude
units : degrees_east
ncl 2> list_filevars(f)
float lon [ lon | 144 ]
coordinate_defines
axis
standard_name
actual_range
long_name
units
float lat [ lat | 37 ]
coordinate_defines
axis
standard_name
long_name
actual_range
units
float level [ level | 12 ]
coordinate_defines
axis
GRIB_name
GRIB_id
positive
long_name
actual_range
units
double time [ time | 48 ]
bounds
coordinate_defines
axis
standard_name
prev_avg_period
avg_period
delta_t
actual_range
long_name
units
short hgt [ time | 48 ] x [ level | 12 ] x [ lat | 37 ] x [ lon | 144 ]
cell_methods
standard_name
parent_stat
statistic
level_desc
dataset
var_desc
GRIB_name
GRIB_id
least_significant_digit
precision
_FillValue
missing_value
scale_factor
add_offset
units
actual_range
unpacked_valid_range
valid_range
long_name
ncl 3> hgt = short2flt(f->hgt)
ncl 4> printvarsummary(hgt)
fatal:syntax error: line 4 before or near \n
printvarsummary(hgt)
--------------------^
fatal:syntax error: possibly an undefined procedure
------------这里没有区分大小写,出错了!!!
ncl 5> printVarSummary(hgt)
Variable: hgt
Type: float
Total Size: 12275712 bytes
3068928 values
Number of Dimensions: 4
Dimensions and sizes: [time | 48] x [level | 12] x [lat | 37] x [lon | 144]
Coordinates:
time: [1832064..1866384]
level: [1000..100]
lat: [90.. 0]
lon: [ 0..357.5]
Number Of Attributes: 20
cell_methods : time: mean (montly from 6-hourly values)
standard_name : geopotential_height
parent_stat : Other
statistic : Individual Obs
level_desc : Pressure Levels
dataset : NCEP/DOE AMIP-II Reanalysis (Reanalysis-2) Monthly Averages
var_desc : Geopotential height
GRIB_name : HGT
GRIB_id : 7
least_significant_digit : 0
precision : 0
units : m
actual_range : ( -209, 32301 )
unpacked_valid_range : ( -1500, 35800 )
long_name : Monthly Geopotential Heights on Pressure Levels
_FillValue_original : -32767
_FillValue : -32767
missing_value_original : 32766
valid_range : ( -1500, 35799 )
missing_value : -32767
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