MATLAB for Beginners – Volume-1 – MATLAB Basics – Tutorials

Unit-4

Basic Math Calculations

Addition

>> a=1;     % Assign 1 to a
>> b=2;      % Assign 2 to b
>> c=a+b    % Skipping semicolon at the end displays the result
c =
     3

Subtraction

>> d=a-b

d =
    -1

Multiplication

>> e=a*b

e =
     2

Division

>> a=23     % Skip the semicolon at the end to display the value
a =
    23

>> b=5;    % Type semicolon at the end to avoid displaying the value 

>> c=a/b 
c =
    4.6000

>> d=rem(a,b)   
d =
     3

Rounding Off Numbers – Floor

>> c = 4.6;
>> floor(c)  % Rounds off towards negative infinity
ans =
     4

>> floor(-5.43) % Rounds off towards negative infinity
ans =
    -6

Rounding Off Numbers – Ceiling

>> c = 4.6;
>> ceil(c)	% Rounds off towards positive infinity
ans =
     5

>> ceil(-5.43)	 % Rounds off towards positive infinity
ans =
    -5

Rounding Off Numbers – Round

>> round(-5.43)	 % Rounds off towards nearest integer
ans =
    -5
>> round(5.43)	 % Rounds off towards nearest integer
ans =
     5
>> round(5.5)	  % Rounds off towards nearest integer
ans =
     6

Rounding Off Numbers – Fix

>> fix(-5.43)	% Rounds off towards zero

ans =
    -5



>> fix(5.5)		% Rounds off towards zero

ans =      5

Decimal Points

>> a=22/7
a =
    3.1429


>> format long
>> a=22/7
a =
   3.142857142857143


>> format short
>> 22/7
ans =
    3.1429

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