Command reference, MATLAB Programming

Assignment Help:

Matlab Command Reference

1. Getting Help:

The help command is used to find the functions and its syntax. Similarly, lookfor is used to find the functions or topics. For example:

help power

Another example:

lookfor integration

2. Arithmetic Equations:

+,-,* and / are the arithmetic operators. These operators are used in arithmetic expression.+ meansaddition, - meanssubtraction,* meansmultiplication and/ means division.

For example:

            » 5+6/4*2-6

ans =     2

3. Accuracy of Operations:

The eps(x)function used to set the accuracy of floating number. For example:

            » eps(4)

» power(sqrt(2),2)-2

ans =  4.4409e-016

4. Order of operations:

BEDMAS means Bracket, Exponential, Division/Multiplication and Addition/Subtraction. It is very important in arithmetic operations. For example:

            » 5+6/4*2-6

ans =     2

5. Trigonometric Functions:

Sin(x),cos(x), tan(x) and so on are the trigonometric functions.

» tan(45*pi/180)

ans =    1.0000

Here 45 numbers is converted into 45 degree.

6. Exponential and log functions:

exp(x) is the exponential of the elements of x, e to the x.

For complex Z=X+i*Y, EXP(Z) = EXP(X)*(COS(Y)+i*SIN(Y)).

log(x) is the natural logarithm, log10(x)is the base 10 logarithm. For example:

» exp(3)

ans =   20.0855

» log10(10)

ans =    1

7. Vectors:

A Matlab vector is list of values which can be used in function evaluations or arithmetic expressions. For example:

» x=[1:0.5:3]

x =    1.0000    1.5000    2.0000    2.5000    3.0000

Start Value=1

Step Value=0.5

Stop Value=3

 

8. Vector Arithmetic:

To perform element by element multiplication and division, use "dotted" operators. For example:

     » x=[3:0.2:4]

x =    3.0000    3.2000    3.4000    3.6000    3.8000    4.0000

» y=[2:0.5:4.5]

y =    2.0000    2.5000    3.0000    3.5000    4.0000    4.5000

» x.*y

ans =    6.0000    8.0000   10.2000   12.6000   15.2000   18.0000

9. Plotting vectors:

The plot command is used to make x-y plots. For example:

     » x=[3:0.2:4]

x =    3.0000    3.2000    3.4000    3.6000    3.8000    4.0000

» y=[2:0.5:4.5]

y =2.0000    2.5000    3.0000    3.5000    4.0000    4.5000

» plot(x,y)

1722_Command Reference.png

Figure: Plot a line graph of two vector values

 

10. Printing the Plots

» print('-djpeg','Lab1.jpeg')

This command is used to convert the plot into jpeg picture format.

11. 3D Plots

The above plots are two dimensional graphics. Now we study about the three dimensional graphics.

z=peaks(25);       

mesh(z);  

12. Data Type Conversion

These types of functions are used to convert from one data type to another one. For example:

            q=5;

title(['Area = ',num2str(q)]);    

ans     Area=5

13. Limit the Decimal Part

Round function is used to round towards nearest integer. Similarly Floor, Ceil and Fix functions are also related to Round function. For example:

x =2.4455

» round(x)

ans = 2

14. Square and Power Functions

sqrt(x)function is used to calculate the square root the value of x. Similarly,the power function is used to calculate the power of the value of x. For example:

 » a=30

a = 30

» sqrt(a)

ans = 5.4772

     » power(a,1/2)

ans = 5.4772

15. Conversion

If we need to change from decimal to binary or decimal to octal we use bin2dec and dec2binfunctions. For example:

            » dec2bin(5)

ans = 101

» bin2dec('101')

ans = 5


Related Discussions:- Command reference

A matlab program to produce a map of the route, Micro-mouse is an engineeri...

Micro-mouse is an engineering design competition created by IEEE in the late 1970s. Small robotic "mice" solve a 16x16 cell maze. The mice are completely autonomous and must find t

CPM AND PERT, ACTIVITIES OF A PROJECT 1-2 1-3 1-4 1-5 2-6 3-6 3-7 4-7 5-7 7...

ACTIVITIES OF A PROJECT 1-2 1-3 1-4 1-5 2-6 3-6 3-7 4-7 5-7 7-6 6-8 7-8 THE COMMPANY LOSES 2,000 FOR EVERY WEEK THE PROJECT LASTS BEYOND 30 WEEKS. fOR EACH OF THE PROPOSALS; ACTIVI

Calculate displacement using indefinite integrals, Problem: A function ...

Problem: A function is given by Y= 2x3 + 3 x2 -12x + 5 a determine the finite values of x at which any local maximum of minimum occur and determine the corresponding val

Various commands for get the help, Various commands for get the help: T...

Various commands for get the help: There are various commands which can serve as an introduction to MATLAB and allow you to get the help: info will show contact informatio

Logical operators, logical operators: The logical operators are as sho...

logical operators: The logical operators are as shown below: All the logical operators operate on Boolean or logical operands. The not operator is a unary operator; wh

If-else statement, The IF-ELSE Statement: The if statement selects whe...

The IF-ELSE Statement: The if statement selects whether an action is executed or not. Selecting between the two actions, or selecting from numerous actions, is accomplished by

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd