103

MATLAB 2-D Plots

Objective: To study graphics, i.e., 2-D plots, printing labels, grid and axis box, text in plot, bar, and pie chart.

Example

Output:

Multiple plots:

Examples

Output:

Line color, Line style, Marker style, and legends:

• Line color:

y  m  c  r  g  b  w  k

• Marker style:

.  → point                                                               o → circle  x → x-mark  + → plus  *→ star  s → square  d → diamond  v → triangle(left)  ^ → triangle(up)  < → triangle(left)  >→ triangle(right)  p → pentagon  h → hexagon              <none> → no marker

• Line style:

-  → solid   -. → dashed dot  -- →dashed  .. → dotted  <none> → no line

TITLE:

Title (‘title_string’, ‘Font Name’, Helvetica’,’Font Size’,20.’color’,’green’,’Font Weight’,’light/bold/normal’,’Font Angle’,’Normal/italic’);

AXES:

Axes(‘Position’,[left, bottom,width,height])

E.g.: To create axes at (0.2,0.2), size half of the figure window.

            axes (‘Position’, [.2 .2 .5  .5]);

TEXT:

To add a text string to a specified location in the plot area.

text(r,c,’string’);

GTEXT: need not to specify text location.

gtext(‘string’);

where we click, the text will be displayed there.

LEGEND:

Position of legend:

top lefttop centertop right
  medium leftmedium center           medium right
  bottom leftbottom center           bottom right

Example

Output:

Statistical plots:

pie(x):

Example

Output:

To pull out 3^rd slide:

Example

Output:

To pull text labels:

Example

Output:

Bar graphs:

bar(x): It plots the bar. Plot the values of x against the time index.

bar(t,x): if we want to give t by ourselves.

Example

Output:

bar(x,’stacked’):

Output:

Print command:

print<option><filename>

options:

• -deps: It creates a monochrome encapsulated postscript image.
• -depsc: It creates a colored encapsulated postscript image.
• -djpeg: Its joint photography expert group.
• -dpng: Its portable network graphics.

E.g.: print -djpeg myimg.jpeg

---