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Advanced File Input and output:
Where 'format' involves the conversion characters much like those used in the fprintf function. For illustration, to read the file 'subjexp.dat' just shown, we can do the following (again, for ease, omitting the error-check of fopen & fclose):
>> fid = fopen('subjexp.dat');
>> subjdata = textscan(fid,'%f %c');
>> fclose(fid)
The format string '%f %c' identifies that on each line there is a double value followed by the space followed by the character. This generates a 1 × 2 cell array variable known as the subjdata. The initial element in this cell array is a column vector of doubles (the initial column from the file); the next element is a column vector of characters (the next column from the file), as shown here:
>> subjdata
subjdata =
[5x1 double] [5x1 char]
>> subjdata{1}
ans =
5.3000
2.2000
3.3000
4.4000
1.1000
>> subjdata{2}
a
b
To refer to separate values from the vector, it is essential to index into the cell array by using curly braces and then index into the vector by using the parentheses.
Steps for input output functions - Lower level file: The steps involved are as shown below: Open the file. Read the file, write to the file, or append to the file.
Properties of the text box - graphics objects: By using get will show properties of the text box, the illustration is as shown below: >> get(thand) BackgroundColor
Illustration of Mode When there is more than one value with similar (highest) frequency, then the smaller value is mode. In the case below, as 3 and 8 appear twice in the vecto
Example of Median For the vector [1 4 5 9 12 33], the median is the average of the 5 & 9 in the middle: >> median([1 4 5 9 12 33]) ans = 7
Illustration of nested for loops and the if statements: For illustration,when the file contains: 33 -11 2 4 5 9 22 5 -7 2 11 3 the outco
Execution of persistent variables: The functions can also be called from the script or from the Command Window, as shown here. For illustration, the functions are called first
Example of Vectorizing: Likewise, for an operation on a matrix, a nested loop would be needed; for illustration, supposing a matrix variable mat: [r c] = size(mat); for
Functions which return Values versus printing: Also, the function which computes and returns values (throughout the output arguments) does not generally print them; that is le
Illustration of tracing a error: The one way of following the flow of function, or tracing it, is to use the echo function. The echo function, that is a toggle, will show each
function sortrows - sorting strings: The function sortrows sorts each and every row as a block, or group, and it also will work on numbers. Here in this illustration the rows
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