add period to nc_date

Author: kongdd

docs/make.jl

@@ -8,6 +8,7 @@ makedocs(modules=[NetCDFTools], sitename="NetCDFTools.jl")
 makedocs(modules=[NetCDFTools],
   sitename="NetCDFTools.jl",
   doctest=false,
+  warnonly=true,
   format=Documenter.HTML(
     prettyurls=CI,
   ),

src/nc_date.jl

@@ -1,8 +1,12 @@
 nc_date(ds::NCdata) = ds["time"][:]
 
-function nc_date(file::NCfiles)
+function nc_date(file::NCfiles; period=nothing)
   nc_open(file) do ds
-    nc_date(ds)
+    dates = nc_date(ds)
+    period === nothing && return dates
+
+    inds = period[1] .<= year.(dates) .<= period[2]
+    return dates[inds]
   end
 end