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Illustration of if - else statement:
The one application of an if-else statement is to check for errors in the inputs to a script. For illustration, a former script prompted the user for a radius, and then used that to compute the area of a circle. Though, it did not check to make sure that the radius be valid (example, a positive number). Here is a modified script which checks the radius:
Illustrations of running this script whenever the user enters invalid and then valid radii are shown here:
>> checkradius
Please enter the radius: -4
Sorry; -4.00 is not a valid radius
Please enter the radius: 5.5
For a circle with radius of 5.50, the area becomes 95.03
The if-else statement in this illustration selects between two actions: printing an error message, or really using the radius to compute the area, and then printing out the result. Note that the action of the if clause is a single statement, while the action of the else clause is a group of three statements.
Function call: In the function call, not any arguments are passed so there are no input arguments in the function header. The function returns an output argument, therefore th
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Function iscellstr - string function: The function iscellstr will return the logical true when a cell array is a cell array of all the strings, or logical false if not. >>
Matrix solutions to systems of the linear algebraic equations: The linear algebraic equation is an equation of the form a 1 x 1 + a 2 x 2 + a 3 x 3 . . . . a n x n
Illustration of Gauss elimination: For illustration, for a 2 × 2 system, an augmented matrix be: Then, the EROs is applied to obtain the augmented matrix into an upper
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Illustration of Image processing: This displays that there are 64 rows, or in another word, 64 colors, in this specific colormap. It also displays that the first five colors a
function numden: The function numden will return individually the numerator & denominator of a symbolic expression: >> sym(1/3 + 1/2) ans = 5/6 >> [n, d] =
Defined a variable in work space: The variables defined in the script will become a part of the workspace: >> clear >> who >> mysummfile 15 >> who
function imread: The function imread can read an image file, for illustration a JPEG (.jpg) file. The function reads color images into a 3-dimensional matrix. >> myimage1
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