weighted vertical integration

[Irina Mahlstein]

Hi
I would like to perform a weighted vertical integration. The heather of my file looks as following:
dimensions:
level = 10 ;
latitude = 181 ;
longitude = 360 ;
time = 1 ;
variables:
double level(level) ;
level:axis = "Z" ;
level:units = "millibars" ;
level:long_name = "pressure_level" ;
float pw(level) ;
pw:_FillValue = 1.e+32f ;
pw:long_name = "pressure level weights" ;
float latitude(latitude) ;
latitude:units = "degrees_north" ;
latitude:long_name = "latitude" ;
float longitude(longitude) ;
longitude:units = "degrees_east" ;
longitude:long_name = "longitude" ;
float q(time, level, latitude, longitude) ;
q:_FillValue = 9.96921e+36f ;
q:missing_value = 9.96921e+36f ;
q:units = "kg kg**-1" ;
q:long_name = "Specific humidity" ;
q:standard_name = "specific_humidity" ;
int time(time) ;
time:units = "hours since 1900-01-01 00:00:0.0" ;
time:long_name = "time" ;
time:calendar = "gregorian" ;

   I want to integrate variable 'q' over the level dimension applying the weights 'pw'.

   If I do the following:
   ncwa  -N -v q -w pw
   I end up with one number. It seems to loose the lat/long dimensions.

   Thanks for your help!

[Charlie Zender]

By default ncwa averages over all dimensions. Use -a option to restrict the averaging to specified dimensions, i.e., try
ncwa -N -v q -w pw -a level

[Irina Mahlstein]

thanks