Forward elimination, MATLAB in Engineering

Assignment Help:

Forward elimination:

In forward elimination, we want to obtain a 0 in the a21 position. To accomplish this, we can alter the second line in the matrix by subtracting from it 2 * the first row.

In this way we would write this ERO as:

643_Forward elimination.png

Now, placing it back in the matrix equation form:

1185_Forward elimination1.png

It says that the second equation is now -2x2 = 2 therefore x2 = -1. Now put it into the first equation:

x1 +  2(-1) = 2, and hence  x1 = 4.

This is known as the back-substitution.


Related Discussions:- Forward elimination

Technique is to create one element - vector, Technique is to create one ele...

Technique is to create one element - vector: Technique is to create one element with the values from one structure, and use repmat to replicate it to the preferred size. Then,

Function strncmp, Function strncmp: The function strncmp compares only...

Function strncmp: The function strncmp compares only the first n characters in the strings and ignores the rest. The initial two arguments are strings to compare, and third ar

Illustration sorting vectors of structures, Illustration sorting vectors of...

Illustration sorting vectors of structures: This function sorts the structures depend only on the price field. A more common function is shown next, that receives a string whi

Plotting from a function, Plotting from a Function: The following func...

Plotting from a Function: The following function creates a Figure Window as shown in figure, which shows various types of plots for similar y vector. The vector is passed as a

Forward substitution, Forward substitution: The Forward substitution (...

Forward substitution: The Forward substitution (done methodically by first getting a 0 in the a 21 place, and then a 31 , and lastly a 32 ): For the Gauss technique,

Creating the structure variables, Creating the structure Variables: Cr...

Creating the structure Variables: Creating a structure variable can be accomplished by simply storing the values in fields by using assignment statements, or by using the stru

Function fieldnames - structure functions, Function fieldnames - structure ...

Function fieldnames - structure functions: The function fieldnames will return the names of the fields which are contained in the structure variable. >> pack_fields = fiel

Illustration of preallocating a vector, Illustration of Preallocating a Vec...

Illustration of Preallocating a Vector: Illustration of calling the function: >> myveccumsum([5 9 4]) ans =     5  14  18 At the first time in the loop, outvec wil

Removing whitespace characters, Removing Whitespace Characters: The MA...

Removing Whitespace Characters: The MATLAB has functions which will eliminate trailing blanks from the end of a string and/or leading blanks from the starting of a string.

Illustration of subfunctions, Illustration of Subfunctions: This is an...

Illustration of Subfunctions: This is an illustration of running this program: >> rectarea Please enter the length: 6 Please enter the width: 3 For a rectan

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