create NETCDF file from a existing 3D array

Hello, I hope someone can help me with this.

I have a NETCDF file with multiple variables. I modified all the values of one of the variables (the old variable name is v and the new one is v_rev2).

Now I have a 3D array with the new values (v_rev2)

Now I have the NETCDF file and the 3D array in matlab with new values.

How I can replace the NETCDF file that has multiple variables with my new values for that specific variable? I understand first I need to convert my 3D array into a netcdf file and then I have to replace the old values of vel with the new ones v_rev2 .

I can create a netcdf file but I don't know how to call v_rev2

The dimensions are

n_uvnode=99999; %number of element centroids

n_depth=10; %number of depth layers

nt=24; %time

nccreate('velocityrev2.nc','v_rev2',...
          'Dimensions',{'n_uvnode',99999,'n_depth',10,'nt',24},...
          'Format','classic')
      
%Write data to the variable.
ncwrite('velocityrev2.nc','v_rev2',s_rev2('v_rev2'))

%Display the contents of the NetCDF file.

ncdisp('velocityrev2.nc')

% ncdisp('velocityrev2.nc')
%Source:
%           C:\modelana\velocityrev2.nc
%Format:
%           classic
%Dimensions:
%           n_uvnode = 99999
%           n_depth  = 10
%           nt       = 24
%Variables:
%    v_rev2
%           Size:       99999x10x24
%           Dimensions: n_uvnode,n_depth,nt
%          Datatype:   double