![Matrix entering in mat
A=[1 2 3;2 3 4]
Output we get here is
1 2 3
2 3 4](https://image.slidesharecdn.com/matlab-140314100422-phpapp02/85/mat-lab-introduction-and-basics-to-learn-6-320.jpg)
![Some more commands
Magic(x)
Sum(x)
X’
Diag(x)
Fliplr(x)
Flipud(x)
Size(x)
X(i,j)=n
Length(a)
Mean(A)
Max(a)
[d,n]=max(a)
Min(a)
Sort(a)
Median(a)
Std(a)
Rand
Rand(m,n)](https://image.slidesharecdn.com/matlab-140314100422-phpapp02/85/mat-lab-introduction-and-basics-to-learn-8-320.jpg)
![Solving polynomial
5*s^5+7*s^4+2*s^3+6*s+1
To enter into the mat lab software for working
x=[5 7 0 2 6 1]
At the value of s=2
Enter
X=polyval([x],2)
X=278](https://image.slidesharecdn.com/matlab-140314100422-phpapp02/85/mat-lab-introduction-and-basics-to-learn-10-320.jpg)
![Muliplying two polynomials
Here we write
X=[1 2 3]
Y=[3 4 5]
Z =conv(x,y)
Z=2 11 29 35](https://image.slidesharecdn.com/matlab-140314100422-phpapp02/85/mat-lab-introduction-and-basics-to-learn-11-320.jpg)
![Reading & writing diff files
For reading text files
X = dimread(‘abc.txt’,’,’)
For writing text files
X=[1 2 3 5 7 ]
dlmwrite(‘uvw.txt’,x);
For xls files enter xls in place dlm
Reading image files
F=uigetfile(‘*.m,*.bmp,*.gif,*.jpg’,’xxxxx’)
For plotting graphs
Plot(x,y)](https://image.slidesharecdn.com/matlab-140314100422-phpapp02/85/mat-lab-introduction-and-basics-to-learn-13-320.jpg)
mat lab introduction and basics to learn
- 2. Mat lab is very useful in design field now a days it is widely using software It has so many predefined functions It is space sensitive and case sensitive It is used in rocket launching and designing of mechanical parts
- 3. Some Mat Lab development windows Command Window : where you enter commands Command History : It shows the previously entered commands Editor : Here we edit programs
- 4. COMMANDS CLEAR : remove items from workspace WHO: list variables in workspace QUIT: close matlab
- 5. Math Functions Abs(x)=mod x Sqrt(x)=root x Round(x)=rounds to nearest integer Fix(x)=round to nearest integer towards zero Ceil(x)=nearest to infinite Ceil(x)=nearest to –ve infinite Rem(x,y)=gives remainder Exp(x)=e^x Log(x)=log x base e Sin(x) Cos(x) Tan(x) sinh(x) Cosh(x) Tanh(x)
- 6. Matrix entering in mat A=[1 2 3;2 3 4] Output we get here is 1 2 3 2 3 4
- 7. Colon for matrix A(:,n) = selects all row elements in nth column of A A(n,:) = selects all column elements in nth row of A A(:,m:n)=selects all rows b/w columns m & n A(m:n,:) = selects all columns b/w rows m &n A(m:n,p:q) = selects elements in rows b/w m & n and colmns b/w p &q Isequal(a,b) = if element in a=b returns 1 otherwise 0 Ismember(a,b) = if a element in b returns 1 otherwise 0
- 8. Some more commands Magic(x) Sum(x) X’ Diag(x) Fliplr(x) Flipud(x) Size(x) X(i,j)=n Length(a) Mean(A) Max(a) [d,n]=max(a) Min(a) Sort(a) Median(a) Std(a) Rand Rand(m,n)
- 9. Some functions 1 . Syms x f = inline (‘x^2+2x+1) 2 . Syms (u,v) simplify((u^3-v^3)/(u-v)) 3. Syms a syms b syms c syms x solve(‘a*x^2-b*x+c)
- 10. Solving polynomial 5*s^5+7*s^4+2*s^3+6*s+1 To enter into the mat lab software for working x=[5 7 0 2 6 1] At the value of s=2 Enter X=polyval([x],2) X=278
- 11. Muliplying two polynomials Here we write X=[1 2 3] Y=[3 4 5] Z =conv(x,y) Z=2 11 29 35
- 12. Statements If/elseif/else For loop While loop
- 13. Reading & writing diff files For reading text files X = dimread(‘abc.txt’,’,’) For writing text files X=[1 2 3 5 7 ] dlmwrite(‘uvw.txt’,x); For xls files enter xls in place dlm Reading image files F=uigetfile(‘*.m,*.bmp,*.gif,*.jpg’,’xxxxx’) For plotting graphs Plot(x,y)