Matlab 2013 b

The class of the objectclassName = class(obj)obj = MyClass with properties: Property1: 10 Property2: 20className = 'MyClass'>> isobject() function in MATLABThe isobject() function in MATLAB is used to determine if a variable is an object of a user-defined class. This can be particularly useful when you need to check the type of a variable before performing operations that are specific to objects.In MATLAB, variables can belong to different data types, including numeric arrays, character arrays, structures, cell arrays, and objects. An object in MATLAB is an instance of a class, which can be either a built-in class or a user-defined class. The isobject function helps to identify if a given variable is an object.Syntaxtf = isobject(A)In the syntax above.A − The variable you want to test.tf − A logical value (true or false). It returns true if A is an object; otherwise, it returns false.Let us see few examplesExample 1: Checking a Numeric ArrayA = [1, 2, 3, 4, 5];tf = isobject(A);disp(['Is A an object? ', num2str(tf)]);In the example above tf = isobject(A); checks if A is an object.On execution in matlab command window the output is −>> A = [1, 2, 3, 4, 5];tf = isobject(A);disp(['Is A an object? ', num2str(tf)]);Is A an object? 0>>Example 2: Checking a StructureThe code we have isB = struct('field1', 10, 'field2', 20);tf = isobject(B);disp(['Is B an object? ', num2str(tf)]);Here tf = isobject(B); checks if B is an object.On execution in matlab command window the output is −>> B = struct('field1', 10, 'field2', 20);tf = isobject(B);disp(['Is B an object? ', num2str(tf)]);Is B an object? 0>> Example 3: Checking a User-Defined ObjectFirst, define a custom class MyClass in a file named MyClass.m:The code we have is.% MyClass.mclassdef MyClass properties Property1 Property2 end methods function obj = MyClass(val1, val2) obj.Property1 = val1; obj.Property2 = val2; end

MATLAB is a very powerful, high-level technical computing language used by mathematicians, scientists and engineers to solve problems in a wide range of application areas. It also comes with several toolboxes to solve most common problems. The book introduces MATLAB programming in simple language with numerous examples that help clarify the concepts. It is designed to enable readers develop a strong working knowledge of MATLAB and acquire programming skills to write efficient programs. The book is suitable for undergraduate and postgraduate engineering students, researchers and professionals who wish to learn this language quickly and more conveniently. The readers after going through this book will be able to write their own programs to solve scientific and engineering problems of varying complexity. KEY FEATURES : Use of system commands and problem-solving techniques in command windows is explained in simple and clear language. Handling of arrays and matrices, which are the main entities in MATLAB environment, is discussed extensively in separate chapters. Handling of cell arrays and structures is described clearly with examples. Techniques of developing new MATLAB programs using scripts and functions are explained in a systematic way. File-handling techniques are also demonstrated. Topics of two-dimensional graphics are discussed with illustrative plots. GUI programming is introduced in an easily understandable way.About the author (2007)SINGH, Y. KIRANI Y. KIRANI SINGH, Project Engineer, Centre for Development of Advanced Computing (CDAC), Kolkata. CHAUDHURI, B. B. B. B. CHAUDHURI, Professor and Head, Computer Vision and Pattern Recognition Unit, Indian Statistical Institute Kolkata.Bibliographic information

X has the same numerictype and fimath properties as p. Complex Fixed-Point OneCreate a scalar fixed-point 1 that is not real valued, but instead is complex like an existing array. Define a complex fi object. p = fi( [1+2i 3i],1,24,12);Create a scalar 1 that is complex like p. X = 1.0000 + 0.0000i DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 24 FractionLength: 12Write MATLAB Code That Is Independent of Data TypesWrite a MATLAB® algorithm that you canrun with different data types without changing the algorithm itself.To reuse the algorithm, define the data types separately from thealgorithm.This approach allows you to define a baseline by running thealgorithm with floating-point data types. You can then test the algorithmwith different fixed-point data types and compare the fixed-pointbehavior to the baseline without making any modifications to the original MATLAB code.Write a MATLAB function, my_filter,that takes an input parameter, T, which is a structurethat defines the data types of the coefficients and the input andoutput data. function [y,z] = my_filter(b,a,x,z,T) % Cast the coefficients to the coefficient type b = cast(b,'like',T.coeffs); a = cast(a,'like',T.coeffs); % Create the output using zeros with the data type y = zeros(size(x),'like',T.data); for i = 1:length(x) y(i) = b(1)*x(i) + z(1); z(1) = b(2)*x(i) + z(2) - a(2) * y(i); z(2) = b(3)*x(i) - a(3) * y(i); endendWrite a MATLAB function, zeros_ones_cast_example,that calls my_filter with a floating-point stepinput and a fixed-point step input, and then compares the results.function zeros_ones_cast_example % Define coefficients for a filter with specification % [b,a] = butter(2,0.25) b = [0.097631072937818 0.195262145875635 0.097631072937818]; a = [1.000000000000000 -0.942809041582063 0.333333333333333]; % Define floating-point types T_float.coeffs = double([]); T_float.data = double([]); % Create a step input using ones with the % floating-point data type t = 0:20; x_float = ones(size(t),'like',T_float.data); % Initialize the states using zeros with the % floating-point data type z_float = zeros(1,2,'like',T_float.data); % Run the floating-point algorithm y_float = my_filter(b,a,x_float,z_float,T_float); % Define fixed-point types T_fixed.coeffs = fi([],true,8,6); T_fixed.data = fi([],true,8,6); % Create a step input using ones with the % fixed-point data type x_fixed = ones(size(t),'like',T_fixed.data); % Initialize the states using zeros with the % fixed-point