Purdue University: ECE438 - Digital Signal Processing with Applications
Printing in VISE Laboratory
For information specic to printing in the Purdue VISE laboratory, please refer to this link.
Printing Matlab Figures
The simplest way to print Matlab gures is usually through the menu in the gure window by following File->Print.... Matlab also has a built-in print command that allows you to print from the Matlab prompt. This is sometimes useful in a script if you want to automatically print your gures to les (e.g. pdf or postscript). The print command by itself will print the currently active gure window to the default printer. The active Matlab gure is usually the last gure window that was brought to the forefront. You can also choose the active gure window using the command figure(n) where n is the desired gure number. The default printer is dened by your operating system (not within Matlab), and how to dene this depends on your platform. In Matlab, you can specify the printer to use for each print job with the -P option. print -Pprinter_name You can print to le by specifying one of several options and the lename. For example, the following will print to a pdf le. print -dpdf filename.pdf There are many other output options available (e.g -dps, -djpeg, -dti). See Matlabs help for print for a listing. If you use the subplot command to produce vertically stacked plots, you will often get the best looking output if you specify tall mode before printing the gure. This will stretch the subplots out to use the full height of the paper. To do this, select the active gure then issue the following command orient(tall) directly before you print. You can also obtain print output in landscape mode using orient(landscape)
Questions or comments concerning this laboratory should be directed to Prof. Charles A. Bouman, School of Electrical and Computer Engineering, Purdue University, West Lafayette IN 47907; (765) 4940340; bouman@ecn.purdue.edu
Purdue University: ECE438 - Digital Signal Processing with Applications
Printing Simulink System Windows
To print a Simulink system window, type the following command from the Matlab prompt print -sSimulink_window -Pprinter_name where Simulink_window is the name displayed along the top of the Simulink system window, and printer_name is the destination printer.
Printing Simulink Figures
Some Simulink simulations produce output in standard Matlab gure windows. These can be printed as any other Matlab gure, as described in Section 2 above. Make sure the simulation is completed or terminated before printing the output.
Matlab help on print
PRINT Print figure or model. Save to disk as image or M-file. SYNTAX: print PRINT alone sends the current figure to your current printer. The size and position of the printed output depends on the figures PaperPosition[mode] properties and your default print command as specified in your PRINTOPT.M file. print -s Same as above but prints the current Simulink model. print -device -options You can optionally specify a print device (i.e., an output format such as tiff or PostScript or a print driver that controls what is sent to your printer) and options that control various characteristics of the printed file (i.e., the resolution, the figure to print etc.). Available devices and options are described below. print -device -options filename If you specify a filename, MATLAB directs output to a file instead of a printer. PRINT adds the appropriate file extension if you do not specify one. print( ... ) Same as above but this calls PRINT as a MATLAB function instead of a MATLAB command. The difference is only in the parenthesized argument list. It allows the passing of variables for any of the input arguments and is especially useful for passing the handles
Purdue University: ECE438 - Digital Signal Processing with Applications of figures and/or models to print and filenames. Note: PRINT will produce a warning when printing a figure with a ResizeFcn. To avoid the warning, set the PaperPositionMode to auto or match figure screen size in the PageSetup dialog.
BATCH PROCESSING: You can use the function form of PRINT, which is useful for batch printing. For example, you can use a for loop to create different graphs and print a series of files whose names are stored in an array: for i=1:length(fnames) print(-dpsc,-r200,fnames(i)) end SPECIFYING THE WINDOW TO PRINT -f<handle> % Handle Graphics handle of figure to print -s<name> % Name of an open Simulink model to print h % Figure or model handle when using function form of PRINT Examples: print -f2 print( 2 ) print -svdp
% Both commands print Figure 2 using the default driver % and operating system command specified in PRINTOPT. % prints the open Simulink model named vdp
SPECIFYING THE OUTPUT FILE: <filename> % String on the command line <filename> % String passed in when using function form of PRINT Examples: print -dps foo fn = foo; print( gcf, -dps, fn ) Both save the current figure to a file named foo.ps in the current working directory. This file can now be printed to a PostScript-compatible printer. COMMON DEVICE DRIVERS Output format is specified by the device driver input argument. This argument always starts with -d and falls into one of several categories: Microsoft Windows system device driver options: -dwin % Send figure to current printer in monochrome -dwinc % Send figure to current printer in color -dmeta % Send figure to clipboard (or file) in Metafile format
Purdue University: ECE438 - Digital Signal Processing with Applications -dbitmap -dsetup -v % Send figure to clipboard (or file) in bitmap format % Bring up Print Setup dialog box, but do not print % Verbose mode, bring up the Print dialog box which is normally suppressed.
Built-in MATLAB Drivers: -dps % PostScript for black and white printers -dpsc % PostScript for color printers -dps2 % Level 2 PostScript for black and white printers -dpsc2 % Level 2 PostScript for color printers -deps -depsc -deps2 -depsc2 % % % % Encapsulated Encapsulated Encapsulated Encapsulated PostScript Color PostScript Level 2 PostScript Level 2 Color PostScript
-dhpgl % HPGL compatible with Hewlett-Packard 7475A plotter -dill % Adobe Illustrator 88 compatible illustration file -djpeg<nn> % JPEG image, quality level of nn (figures only) E.g., -djpeg90 gives a quality level of 90. Quality level defaults to 75 if nn is omitted. -dtiff % TIFF with packbits (lossless run-length encoding) compression (figures only) -dtiffnocompression % TIFF without compression (figures only) -dpng % Portable Network Graphic 24-bit truecolor image (figures only) Other output formats are possible by using the GhostScript application supplied with MATLAB. For a full listing see the online help for GHOSTSCRIPT, use the command help private/ghostscript. An example of some of the device drivers supported via GhostScript are: -dljet2p % HP LaserJet IIP -dljet3 % HP LaserJet III -ddeskjet % HP DeskJet and DeskJet Plus -dcdj550 % HP Deskjet 550C (UNIX only) -dpaintjet % HP PaintJet color printer -dpcx24b % 24-bit color PCX file format, 3 8-bit planes -dppm % Portable Pixmap (plain format) Examples: print -dwinc % Prints current Figure to current printer in color print( h, -djpeg, foo) % Prints Figure/model h to foo.jpg PRINTING OPTIONS Options only for use with PostScript and GhostScript drivers:
Purdue University: ECE438 - Digital Signal Processing with Applications -loose -append -tiff -cmyk -adobecset % % % % % Use Figures PaperPosition as PostScript BoundingBox Append, not overwrite, the graph to PostScript file Add TIFF preview, EPS files only (implies -loose) Use CMYK colors instead of RGB Use Adobe PostScript standard character set encoding
Options for PostScript, GhostScript, Tiff, Jpeg, and Metafile: -r<number> % Dots-per-inch resolution. Defaults to 90 for Simulink, 150 for figures in image formats and when printing in Z-buffer or OpenGL mode, screen resolution for Metafiles and 864 otherwise. Use -r0 to specify screen resolution. Example: print -depsc -tiff -r300 matilda Saves current figure at 300 dpi in color EPS to matilda.eps with a TIFF preview (at 72 dpi for Simulink models and 150 dpi for figures). This TIFF preview will show up on screen if matilda.eps is inserted as a Picture in a Word document, but the EPS will be used if the Word document is printed on a PostScript printer. Other options for figure windows: -Pprinter % Specify the printer. On Windows and Unix. -noui % Do not print UI control objects -painters % Rendering for printing to be done in Painters mode -zbuffer % Rendering for printing to be done in Z-buffer mode -opengl % Rendering for printing to be done in OpenGL mode A note on renderers: when printing figures, MATLAB does not always use the same renderer as on screen. This is for efficiency reasons. There are cases, however, where the printed output is not exactly like the screen representation because of this. In these instances specifying -zbuffer or -opengl will more likely give you output that emulates the screen. See the Using MATLAB Graphics manual for more information on printing. See also printopt, printdlg, orient, imwrite, hgsave, saveas.
