How to open multiple nc files

Hi

I want to load data from 4 different .nc files (four months), but with the same structure and same variables. Can only read them one file at a time. How can I figure it out as a single data file?

How I load one file:

file='December81.nc'
file1='Januar82.nc'
file2='Februar82.nc'
file3='Marts82.nc'

%Viser indholdet af filen.
ncdisp(file)
ncdisp(file1)
ncdisp(file2)

%Åbner filen, så den kun kan læses
ncid=netcdf.open(file,'NOWRITE')
ncid1=netcdf.open(file1,'NOWRITE')
ncid2=netcdf.open(file2,'NOWRITE')

%Indlæser dimensioner, variabler, attributter, unim
[ndim, nvar, natt, unlim]=netcdf.inq(ncid)

for i=0:nvar-1
[varname, xtype, dimid, natt]=netcdf.inqVar(ncid,i);
if strcmp(varname,'surf_temp')==1
    varnumber=i;
end
end

for i=1:length(dimid)
    [dimname, dimlength]=netcdf.inqDim(ncid,dimid(1,i))
end

for i=0:nvar-1
[varname, xtype, dimid, natt]=netcdf.inqVar(ncid,i);

if strcmp(varname,'latitude')==1
    dimnumber=i
end
end

%Definerer længdegrader, breddegrader, tid og z
lon = ncread(file,'longitude') ; nx = length(lon) ; 
lat = ncread(file,'latitude') ; ny = length(lat) ;
time = ncread(file,'time') ; nt = length(time);
z = ncread(file,'z') ; nz = length(z);

[Image Analyst]

Exactly what does "figure it out as a single data file" mean? I have no idea.

You read in the 4 files, so what else do you need? Do you want to put them into a structure array rather than as 4 separate variables?

[Jonas Damsbo]

What I mean is that when I working with the data, I would like, for example. could plot them together in one plot - not 4 plots in one plot - I dont think i can do this with 4 separate files?

[Walter Roberson]

plot does not know or care where data comes from . Use as many files or functions as you need to construct the data to pass to plot.