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nested functionswe have seen that the loops can be nested that means that one inside of the other functions can be nested the terminology for nested
uses of function handlesthe function handles can also be generated for functions other than anonymous functions both built-in amp user-defined
illustration of anonymous functionsdissimilar functions stored in the m-files when no argument is passed to an anonymous function the parentheses
function cirarea - anonymous functionsthe function handle name is cirarea the one argument is passed to the input argument radius the body of the
anonymous functionsthe anonymous function is a very easy one-line function the benefit of an anonymous function is that it does not have to be stored
reading from a mat-filethe load function is used to read from various types of files as with save function by default the file will be supposed to be
appending variables to the mat-fileappending to the file adds to what has been saved in a file and is accomplished by using the -append option for
illustration of writing variables to a filefor illustration in the below session in the command window 3 variables are generated these are then
writing variables to a filethe save command is used to write variables to a file or to append the variables to a mat-file by the default save
illustration of spreadsheet filesthis reads the numbers in a double vector variable nums and the text in a cell array txt the xlsread function
function xlsread - file functionthe function xlsread will read from the spreadsheet file for illustration to read from file just generatedgtgt ssnums
writing and reading spreadsheet filesthe matlab functions xlswrite amp xlsread will write to and read from the spreadsheet files which have the
illustration of writing to fileshere is the other illustration in which a matrix is written to a file at first an arbitrary 2 times 4 matrix is
function fopen - file functionthe permission string in the call to the fopen function identifies that the file is opened for writing to it just as
fprintf function - file functionthe fprintf function really returns the number of bytes which was written to the file therefore if you do not want to
writing to filesthere are many lower level functions which can write to files we will focus on the fprintf function that can be used to write a file
advanced file input and outputwhere format involves the conversion characters much like those used in the fprintf function for illustration to read
fopen function - file functionthe fopen opens the file for reading the fscanf then reads each line one double and one character and put each pair in
fscanf function - file functionthe fscanf reads matrix variable mat columnwise from the file specified by fid the format involves conversion
generic code for reading from filesthe generic code to complete this is as shown below fid fopenfilenameif fid -1 dispfile open not
operation on filewe concentrate first on the fgetl function that reads strings from the file one line at a time the fgetl functions afford more
reading from filesthere are many lower level functions which read from files the function fscanf reads the formatted data into a matrix by using
opening and closing a filethe files are opened with the fopen function by the default fopen function opens a file for reading if the other mode is
steps for input output functions - lower level filethe steps involved are as shown below open the file read the file write to the file or
lower level file io functionswhenever reading from data file as long as the data in the file is regular the load function works-in another words the