Script M-Files
Generally, MATLAB requires the use of several commands to produce a complicated
graphic. Improving these graphics need repeated use of a large number of commands. To
get around this, we enter the commands into a text file (called M-files), and execute them
with one command. M-files used to create complicated graphics are called script M-files.
Example: Plot the solutions to the differential equation 2+=
′xy with initial conditions
2,1,0,1,2)0( −−=yover the interval 22 ≤≤− x
The general solution to the differential equation is Cx
x
xy ++= 2
2
)( 2. The initial
condition Cy =)0( . We create a script file as follows:
1. From the menu, choose File →New →M-file
2. The MATLAB editor will open as a blank page.
3. Enter the following commands
)'2)0(','1)0(','0)0(','1)0(','2)0(('
).'2/to('
)'('
)'('
)'',2
2
2
)'',2
2
1
)'',2
2
0
)'',2
2
1
)'',2
2
2
2:.01:2-
2
2
2
2
2
===−=−=
+=
++=
++=
−−++=
−++=
−++=
=
yyyyylegend
xdxdySolutionstitle
yylabel
txlabel
ongrid
Cx
x
; plot(x,C
Cx
x
; plot(x,C
Cx
x
; plot(x,C
Cx
x
; plot(x,-C
onhold
Cx
x
; plot(x,-C
;x
:
.
.
•Save as mfilename⋅in Current Directory
•Execute by typing filename in Command Window and enter
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