www.gusucode.com > datastoreio工具箱 matlab源码程序 > datastoreio/+matlab/+io/+datastore/@KeyValueDatastore/reset.m
function reset(kvds) %RESET Reset the KeyValueDatastore to the start of the data. % RESET(KVDS) resets KVDS to the beginning of the datastore. % % Example: % -------- % % 'mapredout.mat' is the output file of a mapreduce function. % kvds = datastore('mapredout.mat') % kvds.ReadSize = 3 % % Read 3 key-value pairs % kv3 = read(kvds) % % Reset to the beginning of the datastore % RESET(kvds) % % Read the same 3 key-value pairs % kv3 = read(kvds) % % See also matlab.io.datastore.KeyValueDatastore, read, readall, hasdata, preview % Copyright 2014-2016 The MathWorks, Inc. try if ~isempty(kvds.Splitter) && isvalid(kvds.Splitter) && ... kvds.Splitter.NumSplits ~= 0 kvds.SplitIdx = 1; setSplitsWithValuesOnly(kvds.Splitter, false); if ~isempty(kvds.SplitReader) && isvalid(kvds.SplitReader) kvds.SplitReader.Split = kvds.Splitter.Splits(kvds.SplitIdx); else kvds.SplitReader = createReader(kvds.Splitter, kvds.SplitIdx); end reset(kvds.SplitReader); end catch ME throw(ME); end end