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Use of built-in colormaps:
MATLAB has built-in colormaps, it is also possible to generate others by using combinations of any colors. For illustration, the following generates a customized colormap with only three colors: black, white, & red. This is then set to be the present colormap by passing the color map matrix to the colormap function. Then, a 40× 40 matrix of arbitrary integers in the range from 1 to 3 (as there are just 3 colors) is generated, and that is passed to the image function; the results are as shown in figure:
>> mycolormap = [0 0 0; 1 1 1; 1 0 0]
mycolormap =
0 0 0
1 1 1
1 0 0
>> colormap(mycolormap)
>> mat = randint(40,40,[1 3]);
>> image(mat)
Creating Cell arrays: There are many ways to create cell arrays. For illustration, we will create a cell array in which one element will store an integer, one element store ch
str2num function - String: The function str2num does the opposite; it takes the string in which a number is stored and converts it to the type double: >> num = str2num('123.
Application: Menu driven Modular Program Numerous longer, more involved programs which have interaction with the user are menu-driven, that means that the program prints a men
printrectarea function: function call: printrectarea(length, width) function header: function printrectarea(len, wid) In the function call, there are two argume
Executing a program: Running the program would be completed by typing the name of the script; this would call the other functions: >> calcandprintarea Whenever prompt
Converting between the String and Number types: The MATLAB has many functions which convert numbers to strings in which each character element is a separate digit, and vice ve
Uses of Function handles: The Function handles can also be generated for functions other than anonymous functions, both built-in & user-defined functions. For illustration, th
Gauss-Jordan: The Gauss-Jordan elimination technique begins in similar way which the Gauss elimination technique does, but then rather than of back-substitution, the eliminati
Technique is to create one element - vector: Technique is to create one element with the values from one structure, and use repmat to replicate it to the preferred size. Then,
Reading from a Mat-File: The load function is used to read from various types of files. As with save function, by default the file will be supposed to be a MAT-file, and load
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