%% STEP 1: INHERIT FROM DATASTORE CLASSESclassdefmydatastorePar < matlab.io.Datastore &。。。matlab.io.datastore。Partitionable% properties(Access = private)特性CurrentFileIndex double FileSet matlab.io.datastore.DsFileSetend%% STEP 2: DEFINE THE CONSTRUCTOR AND THE REQUIRED METHODS方法％定义您的数据存储构造函数功能myds = MyDatastorePar(location) myds.FileSet = matlab.io.datastore.DsFileSet(location,。。。“ fileextensions','.bin',。。。'FileSplitSize'，8*1024）;myds.CurrentFileIndex = 1;重置（myds）;end% Define the hasdata method功能tf = hasdata(myds)% Return true if more data is availabletf = hasfile(myds.FileSet);end％定义读取方法功能[数据，信息] =读（myds）％读取有关提取数据的数据和信息% See also: MyFileReader()if~hasdata(myds) error(“没有更多数据”);endfileInfoTbl = nextfile(myds.FileSet); data = MyFileReader(fileInfoTbl); info.Size = size(data); info.FileName = fileInfoTbl.FileName; info.Offset = fileInfoTbl.Offset;% Update CurrentFileIndex for tracking progressiffileInfoTbl.Offset + fileInfoTbl.SplitSize >=。。。fileInfoTbl.FileSize myds.CurrentFileIndex = myds.CurrentFileIndex + 1 ;endend％定义重置方法功能reset(myds)％重置数据开始重置（myds.fileset）;myds.CurrentFileIndex = 1;end％定义进度方法功能frac =进度（myds）％确定您阅读的数据百分比% from a datastorefrac = (myds.CurrentFileIndex-1)/myds.FileSet.NumFiles;end% Define the partition method功能subds = partition(myds,n,ii) subds = copy(myds); subds.FileSet = partition(myds.FileSet,n,ii); reset(subds);endend方法（访问=受保护）% If you use the FileSet property in the datastore,% then you must define the COPYELEMENT method. The% copyelement method allows methods such as readall% and preview to remain stateless功能dscopy = copyElement（ds）dscopy = copyElement@matlab.mixin.copyable（ds）;dscopy.fileset = copy（ds.fileset）;end% Define the maxpartitions method功能n = maxpartitions(myds) n = maxpartitions(myds.FileSet);endendend%%步骤3：实现您的自定义文件阅读功能功能data = myfilereader（fileInfotbl）% create a reader object using FileName阅读器= matlab.io.datastore.dsfileReader（fileInfotbl.fileName）;%寻求偏移量搜索（读者，fileinfotbl.offset，'起源',“文件开始”);％读取fileInfotbl.splitsize数据量data = read（读取器，fileInfotbl.splitsize）;end