Page 838 - Mechatronics with Experiments

824 MECHATRONICS

>> save filename var1 var2 -ascii -double -tab
% saves the selected variables in ascii format in the
filename specified.
% if no variable name is provided, all of the variables
% in workspace is saved.

Data can be displayed in text format on the screen, plotted in graphical form, or saved
toafile,
x
% Not terminating a line in m-file (or in command
window) ";" displays
% the numerical result of the current line on the
screen including the name of the variables
disp(x)
% Displays the value of x without printing the name of
the variable

disp(’Message’);
% display the text string ’Message’

Formatted printing to screen or file can be done using the fprintf() function, which
is almost identical to the fprintf() function used in C language.

A = [1 2 3 ;
4 5 6 ] ;
[row,col]=size(A) ;

fprintf(’The matrix has %4.0f rows and \t %4.0f columns \r\n’,
row, col) ;

% the ’%5d’ means the data for 5 digit integer format,
% the ’%4.0f’ means the data is in decimal notation,
% 4 characters long, 0 digits after the decimal
point.

myTitle = ’Result: Force versus Time’ ;
fprintf(’%s \n’, myTitle) ;

The result is

>>
The matrix has 2 rows and 3 columns

Result: Force versus Time
>>

The

\n
format specifier adds a carriage-return after printing “myTitle” on the screen. In the above
example, “fprintf()” statements print on the screen.