Added matlab_for_beginners

Author: puneet-pr-arya

matlab_for_beginners/README.md

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+
+
+The best way to learn matlab programming is to go through the basics problems along with the code.
+It allows us to understand the matlab language in a better way.
+
+This, matlab_for_beginners tutorial is divided into different parts. Just go one by one through each part.
+After completion of all parts you will have good basic knowledge of matlab.
+
+All The Best.
+

matlab_for_beginners/matlab_introduction.md

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+author - Puneet Prakash Arya
+email  - [email protected]
+github - https://github.com/puneet-pr-arya
+
+
+
+
+"MATLAB" is a programming platform designed specifically for engineers and scientists. 
+The heart of MATLAB is the MATLAB language, a matrix-based language allowing the most natural expression of computational mathematics.
+
+
+What can you do with MATLAB?
+
+Using MATLAB, you can:
+
+Analyze data
+Develop algorithms
+Create models and applications
+
+
+Matlab Advantages
+
+                 (.) Implement and test your algorithms easily
+                 (.) Develop the computational codes easily
+                 (.) Debug easily
+                 (.) Use a large database of built in algorithms
+                 (.) Process still images and create simulation videos easily
+                 (.) Symbolic computation can be easily done
+                 (.) Call external libraries 
+                 (.) Perform extensive data analysis and visualization
+                 (.) Develop application with graphics user interface
+
+
+Who uses MATLAB?
+
+Millions of engineers and scientists in industry and academia use MATLAB. 
+You can use MATLAB for a range of applications, including deep learning and machine learning,
+signal processing and communications, image and video processing, control systems, test and measurement, 
+computational finance, and computational biology.
+
+
+With these tutorials, i would like to give all of you a basic idea of matlab so that all of you got familiar with the platform
+and can work on it in future.
+
+Thank you and all the best.

matlab_for_beginners/part_1(learn_basic_programing)/README.md

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+
+
+This part-1 contains basics programs of matlab to make you familiar with the language.
+For better understanding the basics of the matlab programming,
+please go through the programs according the following
+sequence. Details of each the programs is given alongside:--
+
+1- add.m  ( addition of numbers)
+2- equal.m ( The meaning of "a = b" )
+3- math.m   ( Basic math operations )
+4- equal_add.m  ( The meaning of "a = b", continued )
+5- print.m      ( Formatted output )
+6- formatted_output.m    ( Formatted output continued )
+7- array.m              ( Simple addition of array )
+8- individual_eL_add.m  ( Extracting an individual element of an array )
+9- comment.m         ( The use of comment)
+10- continuation.m   ( Continuation to next line )
+11- intr_math_fun.m  ( Intrinsic math functions and constants )
+12- nam_var.m        ( Naming a variable )
+13- Plot a graph     ( for making a quick plot)
+

matlab_for_beginners/part_1(learn_basic_programing)/add.m

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+%%Addition
+a = 3;
+b = 5;
+c = a+b
+%%Output:8

matlab_for_beginners/part_1(learn_basic_programing)/array.m

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+%%Ex. 7 Arrays
+
+
+a = [3 6 7];
+b = [1 9 4];
+c = a + b
+
+
+%Output:   4 15 11

matlab_for_beginners/part_1(learn_basic_programing)/comment.m

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+%%Ex. 9 Comment
+%
+% This program demonstrates how to "comment out"
+% a segment of code
+
+A = 3;
+B = A*A;
+%
+% B = 2*B <--- This statement is not executed
+%
+C = A+B
+
+
+
+%Output: c = 12

matlab_for_beginners/part_1(learn_basic_programing)/continuation.m

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+%%Ex. 10 Continuation to next line
+summation1 = 1 + 3 + 5 + 7 ...
+ + 9 + 11
+
+
+%Note: The three periods (...) allow continuation to the next line of commands. The two
+%  lines in the above example are essentially one line of "summation1 = 1+3+5+7+9+11".

matlab_for_beginners/part_1(learn_basic_programing)/equal.m

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+%%Ex. 2 The meaning of "a = b"
+
+
+%In Matlab and in any programming language, the statement "a = b" does not mean
+%"a equals b". Instead, it prompts the action of replacing the content of a by the
+%content of b.
+a = 3;
+b = a;
+b
+
+%Output:3

matlab_for_beginners/part_1(learn_basic_programing)/equal_add.m

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+%%Ex. 4 The meaning of "a = b", continued
+a = 3;
+a = a+1;
+a
+
+%Output:4
+

matlab_for_beginners/part_1(learn_basic_programing)/formatted_output.m

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+%%Ex. 6 Formatted output
+a = 3;
+b = a*a;
+c = a*a*a;
+d = sqrt(a);
+fprintf('%4u square equals %4u \r', a, b)
+fprintf('%4u cube equals %4u \r', a, c)
+fprintf('The square root of %2u is %6.4f \r', a, d)
+
+
+%Output:  3 square equals 9
+        % 3 cube equals 27
+        % The square root of 3 is 1.7321

matlab_for_beginners/part_1(learn_basic_programing)/individual_eL_add.m

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+%%Ex. 8 Extracting an individual element of an array
+
+
+a = [3 6 7];
+b = [1 9 4 5];
+c = a(2) + b(4)
+
+
+%Output:  c = 11

matlab_for_beginners/part_1(learn_basic_programing)/intr_math_fun.m

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+%%Ex. 11 Intrinsic math functions and constants
+x = pi;
+y = sin(pi/2)
+z = exp(-sin(pi/2))
+
+
+%Output:
+    %    y = 1
+    %    z = 0.3679

matlab_for_beginners/part_1(learn_basic_programing)/make_graph.m

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+%% Ex. 13 Making a quick plot
+x = [0:0.1:20]; 
+y = sin(x);
+plot(x,y)
+
+
+
+
+% remaks : Remarks: This only serves as a very quick example of what Matlab can do in making
+% plots.The first line is equivalent to x = [0 0.1 0.2 0.3 ... 19.8 19.9 20]. It
+% assigns the content of x which is an array of 201 elements. The "0:0.1:20" means the
+% 201 numbers are evenly spaced. They start from 0 and end at 20 with an increment of
+% 0.1. The second line gives the content of the new array, y, as
+ % y = [sin(x(1)) sin(x(2)) sin(x(3)) ... sin(x(200)) sin(x(201))] ,
+% or
+% y = [sin(0) sin(0.1) sin(0.2) ... sin(19.9) sin(20)] .
+% The 3rd line makes a plot of y vs. x. 

matlab_for_beginners/part_1(learn_basic_programing)/math.m

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+%%Ex. 3 Basic math operations
+
+a = 3;
+b = 9;
+c = 2*a+b^2-a*b+b/a-10
+
+%Output:53

matlab_for_beginners/part_1(learn_basic_programing)/nam_var.m

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+%%Ex. 12 "Clear" a variable
+
+%Naming a variable
+
+%(i) Matlab variables are case sensitive. For example, "ASU" and "asu" are two different
+%variables. (ii) An underscore (_) or a number (0-9) can also be part of the name of a
+%variable. For example, "MAE_384" is a legitimate variable name. (iii) Some names are
+%reserved for special constants. For example (see Ex. 11), "pi" is an intrinsic constant
+%with a fixed value of 3.14159...

matlab_for_beginners/part_1(learn_basic_programing)/print.m

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+%%Ex. 5 Formatted output
+
+fprintf('Hello')
+%Output:Hello

matlab_for_beginners/part_2(basic_looping)/README.md

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+
+
+This part-2 introduces the concept of loops in the matlab language.
+
+For understanding the concept of looping just go through the programs one by one.
+ After that u will be able to apply the loops.
+
+1 - program1 -   ( Loop: Using for command )
+
+2-  program2 -  ( For loop: Utility of the dummy index )
+
+
+3 - program3 -   ( For loop: More on the dummy index)
+
+4 - program4 -    (Treatment of array within a loop)
+
+5 - program5 -     ( Double loop )
+
+
+6 - program6 -     ( another double lopp )
+
+
+7-  program7 -    ( More complicated use of loop and index )
+
+
+8-  wh_loop  -     ( while loop )

matlab_for_beginners/part_2(basic_looping)/program1.m

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+%% The for loop
+%Ex. 1 Loop: Using for command
+b = 3;
+for k = 1:5
+ b
+end
+
+
+%Output: 
+%  3
+%  3
+%  3
+%  3
+%  3
+
+%Remark: The blue-colored segment in lines 2-4 forms a "for-loop". The statement
+% sandwiched between "for k = 1:5" and "end" is repeated 5 times, with the "k" index
+% going from 1 to 5 step 1

matlab_for_beginners/part_2(basic_looping)/program2.m

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+%% Ex. 2 For loop: Utility of the dummy index
+
+b = 3;
+for k = 1:5
+ b^k
+end
+%Output:
+% 3
+% 9
+% 27
+% 81
+% 243
+
+%Remark: The outputs are 3^1, 3^2, 3^3, 3^4, and 3^5. the value of "k" keeps changing as
+% we go through the loop

matlab_for_beginners/part_2(basic_looping)/program3.m

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+%% Ex.3 For loop: More on the dummy index
+
+sum1 = 0;
+for k = 1:9
+ sum1 = sum1+k;
+end
+sum1
+%Output:
+%         45
+% Remark: this program performs the summation of 1+2+3+4+5+6+7+8+9 (= 45).

matlab_for_beginners/part_2(basic_looping)/program4.m

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+%% Ex.4 Treatment of array within a loop
+
+
+b = [3 8 9 4 7 5];
+sum1 = 0;
+for k = 1:4
+ sum1 = sum1+b(k);
+end
+sum1
+
+
+%Output:
+  %       24
+  
+  % Remark: This program performs the summation of sum1 = b(1)+b(2)+b(3)+b(4) =
+% 3+8+9+4 = 24

matlab_for_beginners/part_2(basic_looping)/program5.m

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+%% Ex. 5 Double loop
+
+sum1 = 0;
+for n = 1:2
+ for m = 1:3
+ sum1 = sum1+n*m;
+ end
+end
+sum1
+
+
+%Output:
+       18
+% Remark: this program performs the summation of
+% Sum1 = 1*1+1*2+1*3 +2*1+2*2+2*3 = 18

matlab_for_beginners/part_2(basic_looping)/program6.m

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+%% Ex. 6 Double loop
+
+for n = 1:2
+ for m = 1:3
+ fprintf('n = %3u m = %3u \r', n, m)
+ end
+end
+
+
+%Output:
+% n = 1 m = 1
+% n = 1 m = 2
+% n = 1 m = 3
+% n = 2 m = 1
+% n = 2 m = 2
+% n = 2 m = 3

matlab_for_beginners/part_2(basic_looping)/program7.m

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+%% Ex. 7 More complicated use of loop and index
+
+
+b = [2 5 7 4 9 8 3];
+c = [2 3 5 7];
+sum1 = 0;
+for k = 1:4
+ sum1 = sum1+b(c(k));
+end
+sum1
+%Output:
+%       24
+% Remark: This program performs the summation of
+% sum1 = b(c(1))+b(c(2))+b(c(3))+b(c(4))
+%      = b(2)+b(3)+b(5)+b(7)
+%       = 5+7+9+3
+%       = 24

matlab_for_beginners/part_2(basic_looping)/wh_loop.m

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+%% The while loop
+
+
+x = 3;
+while (x < 100)
+ x = x*3;
+end
+x
+
+
+% Output:
+%      x = 243
+% Remark: One can think of a while loop as a combination of a for loop and an if
+% statement. Here, the looping will keep going indefinitely as long as the condition,
+% (x < 100), is satisfied. Therefore, the value of x progresses from 3, 9, 27, 81, to 243
+% when the loop is terminated.