'showattribute' does not work for some attributes

Hi,

I found cdo showattributes,varname@attributes only show some attributes, but not others. For example,

$ ncdump -h avgtmp.nc
netcdf avgtmp {
dimensions:
    time = UNLIMITED ; // (1 currently)
    y = 385 ;
    x = 360 ;
variables:
    short sst(time, y, x) ;
        sst:_FillValue = -32768s ;
        sst:valid_range = -32767s, 32767s ;
        sst:actual_range = -1.82587709157577, 31.0985797623512 ;
        sst:scale_factor = 0.000502402674244315 ;
        sst:add_offset = 14.6363513353877 ;
        sst:units = "degC" ;
        sst:long_name = "Ocean surface temperature" ;
        sst:coordinates = "plon plat" ;
        sst:cell_measures = "area: parea" ;
    double time(time) ;
        time:long_name = "time" ;
        time:units = "days since 1001-01-01 00:00" ;
        time:calendar = "noleap" ;

// global attributes:
        :NCO = "4.6.9" ;

$ cdo --no_warning -s showattribute,sst@long_name avgtmp.nc
sst:
  long_name = "Ocean surface temperature"

$ cdo -s --no_warning showattribute,sst@coordinates avgtmp.nc
sst:

cdo showattribute (Abort): Could not find variable attribute coordinates in infile.

$ cdo -s --no_warning showattsvar avgtmp.nc
sst:
  long_name = "Ocean surface temperature" 
  units = "degC" 
  missing_value = "-3.276800e+04" 
  actual_range = -1.825877e+00
  cell_measures = "area: parea"

If anyone has ideas why only some of the attributes are supported? Many thanks!

Yanchun

Replies (4)

RE: 'showattribute' does not work for some attributes - Added by Yanchun He almost 6 years ago

...sorry, forget to attache the sample nc file.

avgtmp.nc (148 KB) avgtmp.nc

RE: 'showattribute' does not work for some attributes - Added by Karin Meier-Fleischer almost 6 years ago

Hi Yanchun,

the coordinates plon and plat are missing, there should be a warning message. Turn on warnings.

-Karin

RE: 'showattribute' does not work for some attributes - Added by Yanchun He almost 6 years ago

Thanks Karin,

Yes, I am aware there are warning of the missing plot/plat, but that seems not matter.

Again, I attached the nc file with plat/plon included. And the coordinates, as well as for example scale_factor can not be parsed.

$ ncdump -h avgtmp.nc
netcdf avgtmp {
dimensions:
    time = UNLIMITED ; // (1 currently)
    y = 385 ;
    x = 360 ;
variables:
    short sst(time, y, x) ;
        sst:_FillValue = -32768s ;
        sst:valid_range = -32767s, 32767s ;
        sst:actual_range = -1.82587709157577, 31.0985797623512 ;
        sst:scale_factor = 0.000502402674244315 ;
        sst:add_offset = 14.6363513353877 ;
        sst:units = "degC" ;
        sst:long_name = "Ocean surface temperature" ;
        sst:coordinates = "plon plat" ;
        sst:cell_measures = "area: parea" ;
    double time(time) ;
        time:long_name = "time" ;
        time:units = "days since 1001-01-01 00:00" ;
        time:calendar = "noleap" ;
    double plat(y, x) ;
        plat:units = "degrees_north" ;
        plat:long_name = "Latitude at p-points" ;
        plat:corners = "pclat" ;
    double plon(y, x) ;
        plon:units = "degrees_east" ;
        plon:long_name = "Longitude at p-points" ;
        plon:corners = "pclon" ;

// global attributes:
        :NCO = "4.6.9" ;
}

$ cdo showattsvar,sst avgtmp.nc
sst:
  long_name = "Ocean surface temperature" 
  units = "degC" 
  missing_value = "-3.276800e+04" 
  actual_range = -1.825877e+00
  cell_measures = "area: parea" 
cdo showattsvar: Processed 1 variable ( 0.02s 23MB )

cdo showattribute,sst@scale_factor avgtmp.nc
sst:

cdo showattribute (Abort): Could not find variable attribute scale_factor in infile.

avgtmp.nc (2.26 MB) avgtmp.nc

RE: 'showattribute' does not work for some attributes - Added by Jay Su almost 6 years ago

Similar error here:

cdo showattribute,history infile

=> cdo showattribute (Abort): Could not find global attribute history in infile.

Where infile is created by CDO and should have the history attribute by default.

(1-4/4)

Project

General

Profile

CDO