User`s guide

Data Import and Export
2-15
Data Import and Export
Faster data import from text files using Import Tool, and readtable and
textscan functions
The performance of the Import Tool, the readtable function, and the textscan function
improves for text files.
Import of data as categorical and datetime arrays using the
readtable and textscan functions
The readtable and textscan functions can read data from text files a categorical or
datetime arrays. Use the %C conversion specifier to read text as a category name. Use the
%D conversion specifier to read text as a datetime value.
Data import from text files and collections of text files that do not fit into
memory with datastore
The datastore function creates a datastore for reading collections of data that are too
large to fit in memory. For example, TabularTextDatastore works with collections of
text files.
VideoReader performance improvements and ability to start reading
from a specified time in the video
The VideoReader.hasFrame and VideoReader.readFrame methods allow for improved
performance when reading video files. The methods check for and read the next available
frame in the video. You can set the CurrentTime property to begin reading from a
specified time in the video file. This simplifies seeking into variable frame-rate video.
Compatibility Considerations
When you first create the VideoReader object, VideoReader no longer automatically
populates the NumberOfFrames property . This behavior greatly improves performance,
especially for large files. The NumberOfFrames property will be removed in a
future release, and is now hidden when displaying the properties of a VideoReader