MATLAB Answers

How to shuffle fileDatastore

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Haoqing Li
Haoqing Li on 18 Jun 2020
Commented: dpb on 14 Jul 2020
Hi,
I tried to shuffle fileDatastore, but failed.
Any method how to do it?

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Answers (1)

Ayush Laddha
Ayush Laddha on 19 Jun 2020
I understand that you wish to shuffle the fileDatastore. You can utilize the shuffle function to do so. You can use it as given below –
fs = fileDatastore(path, 'ReadFcn', @load)
shuffled_fs = shuffle(fs)
Link to its documentation –

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Ayush Laddha
Ayush Laddha on 22 Jun 2020
Hi,
It works perfectly fine for me. I am not able to reproduce the issue you are facing. It would be great if you could provide more info about the MATLAB version you are using?
Haoqing Li
Haoqing Li on 1 Jul 2020
Hi,
I'm using 2020a.
dpb
dpb on 14 Jul 2020
I get same error on R2019b as does Haoqing LI (another poster just asked same Q? and this thread showed up in the automated links system so came to investigate).
Dunno' what is different w/ the release Ayush Laddha used, but
>> ds=fileDatastore('3*.xlsx','ReadFcn',@readtable)
ds =
FileDatastore with properties:
Files: {
'C:\Users\...\Documents\MATLAB\Work\3-15-17.xlsx';
'C:\Users\...\Documents\MATLAB\Work\3-16-17.xlsx';
'C:\Users\...\Documents\MATLAB\Work\3-17-17.xlsx'
}
UniformRead: 0
ReadMode: 'file'
BlockSize: Inf
PreviewFcn: @readtable
ReadFcn: @readtable
AlternateFileSystemRoots: {}
>> ds=shuffle(ds)
Undefined function 'shuffle' for input arguments of type 'matlab.io.datastore.FileDatastore'.
>>

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