Create a datastore from the sample file, airlinesmall.csv, which contains tabular data.

ds = tabularTextDatastore('airlinesmall.csv','TreatAsMissing','NA',...
    'MissingValue',0);

Modify the SelectedVariableNames property to specify the variables of interest.

ds.SelectedVariableNames = {'DepTime','ArrTime','ActualElapsedTime'};

Preview the data for the selected variables.

data = preview(ds)

data=8×3 table
    DepTime    ArrTime    ActualElapsedTime
    _______    _______    _________________

      642        735              53       
     1021       1124              63       
     2055       2218              83       
     1332       1431              59       
      629        746              77       
     1446       1547              61       
      928       1052              84       
      859       1134             155       

Create a datastore from the sample file, mapredout.mat, which is the output file of the mapreduce function.

ds = datastore('mapredout.mat');

Preview the data in the datastore.

data = preview(ds)

data=1×2 table
     Key        Value  
    ______    _________

    {'AA'}    {[14930]}

Create a datastore that maintains parity between the pair of images of the underlying datastores. For instance, create two separate image datastores, and then create a combined datastore representing the two underlying datastores.

Create an image datastore imds1 representing a collection of three images.

imds1 = imageDatastore({'street1.jpg','street2.jpg','peppers.png'}); 

Create a second datastore imds2 by transforming the images of imds1 to grayscale and then reflecting the images horizontally.

imds2 = transform(imds1,@(x) fliplr(rgb2gray(x)));

Create a combined datastore from imds1 and imds2.

imdsCombined = combine(imds1,imds2);

Preview the data in the combined datastore. The output is a 1-by-2 cell array. The two columns represent the first subset of data from the two underlying datastores imds1 and imds2, respectively.

dataOut = preview(imdsCombined)

dataOut=1×2 cell array
    {480x640x3 uint8}    {480x640 uint8}

Display the previewed data as a pair of tiled images.

tile = imtile(dataOut);
imshow(tile)