Basics of MATLAB | Chapter 3

Data Types

There are 15 Data types in MATLAB.

double, single	Floating-point numbers
Int8,uint8 Int16,uint16 Int32,uint32 Int64,uint64	Integers
char	Characters & String
logical	Logical class
function_handle	Function Handles
struct	Structure
cell	Cell Array

Some Data Type conversion in MATLAB

>>char                            Character array

>>int2str                         Int data to string

>>mat2str                       Matrix data to string

>>num2str                      Number to str

>>str2double                  String to double precision

>>str2num                      String to number

>>native2unicode           Numeric byte to unicode

>>unicode2native           Unicode to numeric byte

>>base2dec base             Number string to decimal

>>bin2dec binary            Number to decimal

>>dec2base                     Decimal to base number string'

>>dec2bin                       Decimal number to binary

>>dec2hex                      Decimal to hexa

>>hex2dec                      Hex to decimal number

>>hex2num                     Hex to number string

>>cell2mat                      Cell array to numeric

>>cell2struct                   Cell array to structure

>>mat2cell                      Convert array into cell

>>num2cell                     Convert number string into cell

>>struct2cell                    structure to cell array

Programming:

In MATLAB programme is written on editor window before writing a programme we need to know about it.

-clc       it clears the command window

-clear it clears the workspace

Statements and their use.

• The if statement
• The switch statement
• The for Statement
• The while statement

If- else statement use:

Find a Number it's EVEN or ODD ?



n=input('enter any integer n'); if(n>1)     if rem(n,2)==1;         disp('odd');     else         disp('even');     end end

Switch-Case statement use:

A shop model, switch-case used.

disp('Welcome to Mechbots') disp('ENJOY SHOPPING') disp('What would you like to buy today') disp('1= Robot Chasis'); disp('2= Robot Wheels'); disp('3= Robot Track Belt'); disp('4= Robot Arm'); disp('5= Robot Gear Motors'); disp('6= Robot Gears'); disp('7= Robot L Clamp'); disp('8= DIY Kits'); a= input('Input item Number'); switch (a) case 1 disp( 'Which type of chassis you want to buy') disp('1= Tank Chassis') disp('2= Pick and Place Robot Chassis') disp('3= LFR Chassis') disp('4= Steering Robot Chassis') disp('5= Humanoid Robot Chassis ') b=input('Enter Chassis No.'); switch (b) case 1 disp('Please Pay Rs 50') d=input('Enter the amount'); if d<50 Pay=50-d; display(Pay) else disp('Take Remaining Amount') Take=d-50; disp(Take); end case 2 disp('Please Pay Rs 150') d=input('Enter the amount'); if d<150 Pay=150-d; display(Pay) else disp('Take Remaining Amount') Take=d-150; disp(Take); end case 3 disp('Please Pay Rs 250') d=input('Enter the amount'); if d<250 Pay=250-d; display(Pay) else disp('Take Remaining Amount') Take=d-250; disp(Take); end case 4 disp('Please Pay Rs 350') d=input('Enter the amount'); if d<350 Pay=350-d; display(Pay) else disp('Take Remaining Amount') Take=d-350; disp(Take); end case 5 disp('Please Pay Rs 1300') d=input('Enter the amount'); if d<1300 Pay=1300-d; display(Pay) else disp('Take Remaining Amount') Take=d-1300; disp(Take); end end end

For statement use:

To Find factorial of any given number ?

x=input('enter a no.'); a=1; for k=1:x y=a*k; a=y; end disp(y)

Note: In Matlab factorial function is there, factorial(x) we can find factorial of any number.

While statement use:

n=input('enter any integer n'); while(n>1) if rem(n,2)==1; disp('odd'); else disp('even'); end end
Note: To terminate while loop use ctrl+c .

There are more statements like try and catch and etc.