Graphics in MATLAB allow visualization of data in 2D and 3D plots. Common 2D plot commands include plot to graph vectors against each other, and ezplot for simple functions. Labels, titles, legends and grids can be added. Multiple graphs can be plotted on the same axes using hold. Logarithmic and polar plots are also possible. 3D plots include plot3 to connect points in space and mesh/surf to visualize surfaces.

1. MATLAB GRAPHICS

2. PHILOSOPHY
A picture, it is said, is worth a thousand words.
Graphics ki duniyan me swagat hai!!!!
Hum log 2d 3d plots ki kuch jankari lene ki koshish karenge
Per for further information u shud chk the help part in MATLAB

3. Basic 2d graphics
Try this
plot(rand(1,20))
Most common format is plot(x,y) where x and y are nothing but
Vectors of same length.
Axes are automatically scaled and drawn to include the
minimum and maximum data points.
Eg of vectors of same length:
x = 0:pi/40:4*pi;
plot(x, sin(x))

4. Another form of plot to draw a line between two points:
coordinates (0, 1) and (4, 3)
plot([0 4], [1 3])
Also has set of easy to use plot commands called ezplot
Eg ezplot(‘tan(x)’)
ezplot(‘cos(x))
ezplot(‘x^2’)

5. Labels
gtext(‘x marks the spot’)
Try with me!
Try to explore figure menus like insert
grid
title(’text’)
xlabel(’horizontal’)
ylabel(’vertical’)

6. Multiple plots on same axis:
hold
plot(rand(1,20))
plot(rand(1,17))
hold off
If you are plotting two graphs on the same axes you may find
plotyy useful—it allows you to have independent y-axis labels
on the left and the right, e.g.
plotyy(x,sin(x), x, 10*cos(x))
(for x suitably defined).

7. plot(0, 0, 'o')
plot(x,sin(x), x, cos(x), ‘m’)
plots sin (x) in the default style and color and cos (x) with
circles joined with dashes in magenta. The available colors
are denoted by the symbols c, m, y,k, r, g, b, w. You can
have fun trying to figure out what they mean, or you can use
help plot to see the full range of possible symbols.

8. Axis limits
axis( [xmin, xmax, ymin, ymax] )
Go home try to find out on internet abt other axis commands
Multiple plots in figure

9. Logarithmic plots:
x = 0:.01:4;
semilogy(x, exp(x)), grid
Try to find out info on semilogx
Polar plots
polar(theta, r)
x = 0:pi/40:2*pi;
polar(x, sin(2*x)),grid

10. Plotting rapidly changing mathematical function
x = 0.01:.001:.1;
plot(x, sin(1./x))
.001 ki jagah .0001 daliye graphs significantly alag hai
Instead of this use fplot
fplot('sin(1/x)', [0.01 0.1])

11. 3 d plots
plot3(x, y, z)
draws a 2-D projection of a line in 3-D through the points
whose coordinates are the elements of the vectors x, y and
z. For example, the command z-axis
plot3(rand(1,10), rand(1,10), rand(1,10))
generates 10 random points in 3-D space, and joins them with
Lines.

12. Mesh surfaces
z =x^2 –y^2
0<=x<=5 and 0<=y<=5
[x,y] =meshgrid(0:5)
z = x.^2 - y.^2
mesh(x,y,z)
Now type
surf(x,y,z)
See what happens