add modified test script

test.m

-% https://api.db.nomics.world/v22/series/AFDB/bbkawjf/AFDB_CPIA_EM_DB_S.BDI?observations=1
-%[d, dd] = get_series('AFDB','bbkawjf','AFDB_CPIA_EM_DB_S.BDI')
-%disp(d)
-%disp(dd)
-[d, dd] = get_dataset('AMECO','UVGD');
+% fetch series by provider code and dataset code
+df = fetch_series('provider_code', "AMECO", 'dataset_code', "UVGD", 'max_nb_series', 500);
+% fetch one series by ID
+df_id = fetch_series('series_ids',"AMECO/ZUTN/EA19.1.0.0.0.ZUTN");
+% fetch multiple series by ID
+df_ids = fetch_series('series_ids', ["AMECO/ZUTN/EA19.1.0.0.0.ZUTN", "AMECO/ZUTN/DNK.1.0.0.0.ZUTN"]);
+% fetch many series by ID from different datasets
+df_ids_sets = fetch_series('series_ids', ["AMECO/ZUTN/EA19.1.0.0.0.ZUTN", "AMECO/ZUTN/DNK.1.0.0.0.ZUTN", "IMF/CPI/A.AT.PCPIT_IX"]);
+
+% fetch time series by code mask 
+df_code_mask1 = fetch_series('provider_code', "IMF", 'dataset_code', "CPI", 'series_code', "M.FR+DE.PCPIEC_IX+PCPIA_IX");
+df_code_mask2 = fetch_series('provider_code', "IMF", 'dataset_code', "CPI", 'series_code', ".FR.PCPIEC_WT");
+% df_code_mask3 = fetch_series('provider_code', "IMF", 'dataset_code', "CPI", 'series_code', "M..PCPIEC_IX+PCPIA_IX", 'max_nb_series', 400);
+% fetch series by dimensions
+% dimensions=struct("geo", "dnk");
+df_dim = fetch_series('provider_code',"AMECO", 'dataset_code', "ZUTN", 'dimensions', '{"geo":["dnk"]}');
+df_dims = fetch_series('provider_code',"WB",'dataset_code',"DB", 'dimensions', '{"country":["ES","FR","IT"],"indicator":["IC.REG.COST.PC.FE.ZS.DRFN"]}');
+% fetch series by api link
+df_link = fetch_series_by_api_link("https://api.db.nomics.world/v22/series/WB/DB?observations=1&dimensions=%7B%22country%22%3A%5B%22FR%22%2C%22IT%22%2C%22ES%22%5D%2C%22indicator%22%3A%5B%22IC.REG.COST.PC.FE.ZS.DRFN%22%5D%7D");
+% fetch series from the cart
+df_cart = fetch_series_by_api_link("https://api.db.nomics.world/v22/series?series_ids=AMECO%2FZUTN%2FEA19.1.0.0.0.ZUTN&observations=1");
+% fetch multi frequency series
+df_multi_freq = fetch_series('series_ids', ["BEA/NIUnderlyingDetail-U001BC/S315-A",...
+                                            "BEA/NIUnderlyingDetail-U001BC/S315-Q",...
+                                            "BEA/NIUnderlyingDetail-U001BC/S315-M"]);
+                                        
+%% TO BE IMPLEMENTED
+% fetch one series and apply interpolation filter %NOT IMPLEMENTED
+df_filter = fetch_series('series_ids', "AMECO/ZUTN/EA19.1.0.0.0.ZUTN",...
+                         'dbnomics_filters', '{"code":["interpolate"], "parameters": {"frequency": ["monthly"], "method": ["spline"]}}');