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partition

Partition MDF datastore

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Syntax

subds = partition(mdfds,N,index)
subds = partition(mdfds,'Files',index)
subds = partition(mdfds,'Files',filename)

Description

subds = partition(mdfds,N,index) partitions the MDF datastore mdfds into the number of parts specified by N, and returns the partition corresponding to the index index.

example

subds = partition(mdfds,'Files',index) partitions the MDF datastore by files and returns the partition corresponding to the file of index index in the Files property.

example

subds = partition(mdfds,'Files',filename) partitions the datastore by files and returns the partition corresponding to the specified filename.

example

Examples

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Partition an MDF datastore from the sample file CANape.MF4, and return the first part.

mdfds = mdfDatastore("C:\myMDFData\CANape.MF4");
N = numpartitions(mdfds);
subds1 = partition(mdfds,N,1);

Partition an MDF datastore according to its files, and return partitions by index and file name.

cd C:\myMDFData
mdfds = mdfDatastore({'CANape1.MF4','CANape2.MF4','CANape3.MF4'});
mdfds.Files 
ans =
  3×1 cell array
    'C:\myMDFData\CANape1.MF4'
    'C:\myMDFData\CANape2.MF4'
    'C:\myMDFData\CANape3.MF4'
subds2 = partition(mdfds,'files',2);
subds3 = partition(mdfds,'files','C:\myMDFData\CANape3.MF4');

Input Arguments

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MDF datastore, specified as an MDF datastore object.

Example: mdfds = mdfDatastore("CANape.MF4")

Number of partitions, specified as a double of positive integer value. Use the numpartitions function for the recommended number or partitions.

Example: numpartitions(mdfds)

Data Types: double

Index, specified as a double of positive integer value. When using the 'files' partition scheme, this value corresponds to the index of the MDF datastore object Files property.

Example: 1

Data Types: double

File name, specified as a character vector. The argument can specify a relative or absolute path.

Example: "CANape.MF4"

Data Types: char

Output Arguments

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MDF datastore partition, returned as an MDF datastore object. This output datastore is of the same type as the input datastore mdfds.

Version History

Introduced in R2017b

See Also

Functions