Graphics Programs Reference
In-Depth Information
Fig. 2.3
Screenshot of the MATLAB
Text Editor
showing the function
average
. The
function starts with a line containing the keyword
function
, the name of the function
average
and the input variable
x
and the output variable
y
. The following lines contain
the output for
help average
, the copyright and version information as well as the actual
MATLAB code for computing the average using this function.
which displays the fi rst block of contiguous comment lines. The fi rst execut-
able statement or blank line — as in our example — effectively ends the
help section and therefore the output of
help
. Now we are independent from
the variable names used in our function. We clear the workspace and defi ne
a new data vector.
clear
data = [3 6 2 -3 8];
We run our function by the statement
result = average(data);
This clearly illustrates the advantages of functions compared to scripts.
Typing
whos
results in
Name Size Bytes Class
data 1x5 40 double array
result 1x1 8 double array
Grand total is 6 elements using 48 bytes
