hasNextFile

Determine if file-set has another file in file-set

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Syntax

tf = hasNextFile(fs)

Description

tf = hasNextFile(fs) returns logical 1 (true) if any more files are available to process in the FileSet object specified by fs. Otherwise, it returns logical 0 (false).

example

Examples

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Check if a file-set has another file and read the data iteratively.

Create a file-set fs for a collection of files.

folder = {'accidents.mat','airlineResults.mat','census.mat','earth.mat'}
folder = 1×4 cell
    {'accidents.mat'}    {'airlineResults.mat'}    {'census.mat'}    {'earth.mat'}


fs = matlab.io.datastore.FileSet(folder)
fs = 
  FileSet with properties:

                    NumFiles: 4
                NumFilesRead: 0
                    FileInfo: Show FileInfo for all 4 files
    AlternateFileSystemRoots: {}

Use the hasNextFile and nextfile functions to read file information one file at a time while files remain in the set.

while hasNextFile(fs)
   file = nextfile(fs)
end
file = 
  1×1 FileInfo
                Filename                FileSize
    _______________________________    __________

    "C:\...\folder1\accidents.mat"        7343   


file = 
  1×1 FileInfo
                  Filename                  FileSize
    ___________________________________    __________

    "C:\...\folder1\airlineResults.mat"    1.5042e+05


file = 
  1×1 FileInfo
              Filename              FileSize
    ___________________________    __________

    "C:\...\folder1\census.mat"        353    


file = 
  1×1 FileInfo
              Filename              FileSize
    ___________________________    __________

    "C:\...\folder1\earth.mat"        32522

Input Arguments

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File-set, specified as a FileSet object. To create a FileSet object, see matlab.io.datastore.FileSet.

Version History

Introduced in R2020a

See Also

Topics