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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.
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
Nested Structures: The nested structure is a structure in which at least one of the members is itself a structure. For illustration, a structure for the line segment may co
Mode The mode of a data set is the value which appears most often. The built-in function in a MATLAB for this is known as the mode. >> x = [9 10 10 9 8 7 3 10 9 8 5 10];
Introduction and Purpose In the lectures and tutorials you have been introduced to a number of probability distributions. You have also learned that modelling any system (such
Advanced File Input and Output: In that section, we saw how to read the values entered by user using the input as well as the output functions disp and fprintf, that shows inf
Help function: Function is computing the two values, there are two output arguments in the function header (i.e., area & circum), that are placed in the square brackets [ ]. A
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
Nested Functions: We have seen that the loops can be nested, that means that one inside of the other, functions can be nested. The terminology for nested functions is that an
Indexing: The Indexing is an alternate to sort a vector. With indexing, the vector is left in its original order. An index vector is used to point values in the original vecto
Graphics objects: The objects involve graphics primitives like lines and text, and also the axes used to orient the objects. These objects are organized hierarchically, and the
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