Data Import and Analysis > Data Import and Export

83 functions in MATLAB › Data Import and Analysis > Data Import and Export.

Standard File Formats

`audioinfo`	Reads the metadata of an audio file without loading its samples.
`audioread`	Reads an audio file into a matrix of samples and returns its sample rate.
`audiowrite`	Writes a matrix of samples to an audio file.
`close`	Closes figure windows.
`csvread`	Reads a comma-separated numeric file into a matrix.
`csvwrite`	Writes a numeric matrix to a comma-separated file.
`delimitedTextImportOptions`	Creates an options object that describes how to import a delimited text file.
`dlmread`	Reads a delimited numeric file into a matrix.
`dlmwrite`	Writes a numeric matrix to a delimited text file.
`fileread`	Reads a whole text file into a character vector.
`get`	Reads a property of a graphics object.
`imfinfo`	Returns information about an image file.
`importdata`	Loads data from a file, choosing the loader by file type.
`imread`	Reads an image file into an array.
`imwrite`	Writes an array to an image file.
`jsondecode`	Converts JSON text into MATLAB values.
`jsonencode`	Converts MATLAB values into JSON text.
`lin2mu`	Converts linear audio samples to 8-bit mu-law.
`mu2lin`	Converts 8-bit mu-law codes back to linear audio samples.
`readcell`	Reads a spreadsheet or delimited text file into a cell array.
`readlines`	Reads the lines of a text file into a string array.
`readmatrix`	Reads a numeric matrix from a text or spreadsheet file.
`readstruct`	Reads an XML file into a scalar struct.
`readvars`	Reads the columns of a file into separate variables.
`set`	Sets properties of a graphics object.
`sheetnames`	Lists the sheet names of a spreadsheet file.
`textread`	Reads formatted text-file data into separate variables.
`textscan`	Reads formatted data from a file or text into a cell array of columns.
`Tiff.close`	Closes the TIFF file held by a `Tiff` object.
`Tiff.computeStrip`	Returns the index of the strip that contains a given image row.
`Tiff.computeTile`	Returns the index of the tile that contains a given image position.
`Tiff.currentDirectory`	Returns the number of the current image directory in the file.
`Tiff.getTag`	Reads the value of a TIFF tag of the current directory.
`Tiff.getTagNames`	Returns the names of the tags that the `Tiff` class supports.
`Tiff.getVersion`	Returns the version text of the TIFF library in use.
`Tiff.isTiled`	Tells whether the current image is stored in tiles.
`Tiff.lastDirectory`	Tells whether the current directory is the last one in the file.
`Tiff.nextDirectory`	Moves to the next image directory in the file.
`Tiff.numberOfStrips`	Returns the number of strips in the current image.
`Tiff.numberOfTiles`	Returns the number of tiles in the current image.
`Tiff.read`	Reads the whole current image into an array.
`Tiff.readEncodedStrip`	Reads one strip of the current image, still as stored.
`Tiff.readEncodedTile`	Reads one tile of the current image, still as stored.
`Tiff.readRGBAImage`	Reads the whole image converted to RGB color data.
`Tiff.readRGBAStrip`	Reads one strip converted to RGB color data.
`Tiff.readRGBATile`	Reads one tile converted to RGB color data.
`Tiff.rewriteDirectory`	Updates the current directory of a file with changed tags.
`Tiff.setDirectory`	Makes a given image directory the current one.
`Tiff.setSubDirectory`	Moves to a sub-image whose file offset is given by a `SubIFD` tag.
`Tiff.setTag`	Sets the value of a TIFF tag before writing an image.
`Tiff.write`	Method of a Tiff object: writes an image to the current directory of a TIFF file opened for writing.
`Tiff.writeDirectory`	Method of a Tiff object: closes the current image directory and starts a new one, for multi-image TIFF files.
`Tiff.writeEncodedStrip`	Method of a Tiff object: writes one strip of a stripped TIFF image from an array of pixels.
`Tiff.writeEncodedTile`	Method of a Tiff object: writes one tile of a tiled TIFF image from an array of pixels.
`type`	Displays the contents of a text file in the command window.
`writecell`	Writes a cell array to a delimited text file or spreadsheet.
`writelines`	Writes text lines to a file, one string per line.
`writematrix`	Writes a numeric matrix to a delimited text file or spreadsheet.
`writestruct`	Writes a structure to an XML or JSON file.
`xlsfinfo`	Reports whether a file is a readable spreadsheet and lists its sheets.
`xlsread`	Reads numbers and text from an Excel spreadsheet.
`xlswrite`	Writes a matrix or cell array to an Excel spreadsheet.

Workspace Variables and MAT-Files

`clear`	Removes variables from the workspace.
`clearvars`	Clears selected variables from the workspace, with options to keep some.
`disp`	Displays a value in the command window without printing its name.
`formattedDisplayText`	Returns, as a string, the text that displaying a value would print.
`load`	Loads variables from a MAT-file or numeric data from a text file.
`matfile`	Accesses variables in a MAT-file without loading the whole file.
`save`	Saves workspace variables to a MAT-file or a text file.
`who`	Lists the names of the variables in the current workspace.

Low-Level File I/O

`fclose`	Closes an open file.
`feof`	Tests whether the read position is at the end of a file.
`ferror`	Returns the error message and code of the last file operation.
`fgetl`	Reads one line from a file and drops the newline.
`fgets`	Reads one line from a file and keeps the newline character.
`fopen`	Opens a file and returns a file identifier.
`fprintf`	Writes formatted text to the command window or to a file.
`fread`	Reads binary data from a file.
`frewind`	Moves the read position of a file back to its beginning.
`fscanf`	Reads formatted data from a text file.
`fseek`	Moves the file position to a given byte offset.
`ftell`	Returns the current byte position in a file.
`fwrite`	Writes binary data to a file.