Main Content

hasdata

Determine if data is available to read from datastore

所有的页面崩溃

Syntax

tf = hasdata(ds)

Description

example

tf= hasdata(ds)returns logical1(true) if there is data available to read from the datastore specified byds. Otherwise, it returns logical0(false).

Examples

collapse all

Open Live Script

Check if pixel label data can be read from a datastore.

Set the location of the image and pixel label data.

dataDir = fullfile(toolboxdir('vision'),'visiondata'); imDir = fullfile(dataDir,'building'); pxDir = fullfile(dataDir,'buildingPixelLabels');

Create an image and pixel label datastore.

imds = imageDatastore(imDir); classNames = ["sky""grass""building""sidewalk"]; pixelLabelID = [1 2 3 4]; pxds = pixelLabelDatastore(pxDir,classNames,pixelLabelID);

While data is available in the datastore, read the data.

whilehasdata(pxds) T = read(pxds);end

Input Arguments

collapse all

Datastore with labeled data for training a semantic segmentation network or an object detection network, specified as apixelLabelDatastore,pixelLabelImageDatastore, orboxLabelDatastoreobject.

Output Arguments

collapse all

Datastore data status, returned as a logical1(true) if there is data available to read from the datastore specified byds. Otherwise, it returns logical0(false).

版本;n History

Introduced in R2017b

See Also

||