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fennecs/matlab/export_fig/SYNTAX
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SYNTAX
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Syntax:
[imageData, alpha] = export_fig(filename, [handle], options...)
Examples:
imageData = export_fig
[imageData, alpha] = export_fig
export_fig filename
export_fig filename -format1 -format2
export_fig ... -nocrop
export_fig ... -c[<val>,<val>,<val>,<val>]
export_fig ... -transparent
export_fig ... -native
export_fig ... -m<val>
export_fig ... -r<val>
export_fig ... -a<val>
export_fig ... -q<val>
export_fig ... -p<val>
export_fig ... -d<gs_option>
export_fig ... -depsc
export_fig ... -<renderer>
export_fig ... -<colorspace>
export_fig ... -append
export_fig ... -bookmark
export_fig ... -clipboard<:format>
export_fig ... -update
export_fig ... -version
export_fig ... -nofontswap
export_fig ... -font_space <char>
export_fig ... -linecaps
export_fig ... -noinvert
export_fig ... -preserve_size
export_fig ... -options <optionsStruct>
export_fig ... -silent
export_fig ... -regexprep <pattern> <replace>
export_fig ... -toolbar
export_fig ... -menubar
export_fig(..., handle)
export_fig(..., figName)
Description:
This function saves a figure or single axes to one or more vector and/or
bitmap file formats, and/or outputs a rasterized version to the workspace,
with the following properties:
- Figure/axes reproduced as it appears on screen
- Cropped/padded borders (optional)
- Embedded fonts (vector formats)
- Improved line and grid line styles
- Anti-aliased graphics (bitmap formats)
- Render images at native resolution (optional for bitmap formats)
- Transparent background supported (pdf, eps, png, tif, gif)
- Semi-transparent patch objects supported (png, tif)
- RGB, CMYK or grayscale output (CMYK only with pdf, eps, tif)
- Variable image compression, including lossless (pdf, eps, jpg)
- Optional rounded line-caps (pdf, eps)
- Optionally append to file (pdf, tif, gif)
- Vector formats: pdf, eps, emf, svg
- Bitmap formats: png, tif, jpg, bmp, gif, clipboard, export to workspace
This function is especially suited to exporting figures for use in
publications and presentations, because of the high quality and
portability of media produced.
Note that the background color and figure dimensions are reproduced
(the latter approximately, and ignoring cropping & magnification) in the
output file. For transparent background (and semi-transparent patch
objects), use the -transparent option or set the figure 'Color' property
to 'none'. To make axes transparent set the axes 'Color' property to
'none'. PDF, EPS, TIF & PNG are the only formats that support a transparent
background; only TIF & PNG formats support transparency of patch objects.
The choice of renderer (opengl/zbuffer/painters) has a large impact on the
output quality. The default value (opengl for bitmaps, painters for vector
formats) generally gives good results, but if you aren't satisfied
then try another renderer. Notes:
1) For vector formats (EPS,PDF), only painters generates vector graphics
2) For bitmap formats, only opengl correctly renders transparent patches
3) For bitmap formats, only painters correctly scales line dash and dot
lengths when magnifying or anti-aliasing
4) Fonts may be substitued with Courier when using painters
When exporting to vector format (PDF & EPS) and bitmap format using the
painters renderer, this function requires that ghostscript is installed
on your system. You can download this from: http://www.ghostscript.com
When exporting to EPS it additionally requires pdftops, from the Xpdf
suite of functions. You can download this from: http://xpdfreader.com
SVG output uses Matlab's built-in SVG export if available, or otherwise the
fig2svg (https://github.com/kupiqu/fig2svg) or plot2svg
(https://github.com/jschwizer99/plot2svg) utilities, if available.
Note: cropping/padding are not supported in export_fig's SVG and EMF output.
Inputs:
filename - string containing the name (optionally including full or
relative path) of the file the figure is to be saved as. If
a path is not specified, the figure is saved in the current
directory. If no name and no output arguments are specified,
the default name, 'export_fig_out', is used. If neither a
file extension nor a format are specified, a ".png" is added
and the figure saved in that format.
-<format> - string(s) containing the output file extension(s). Options:
'-pdf', '-eps', 'emf', '-svg', '-png', '-tif', '-jpg' and '-bmp'.
Multiple formats can be specified, without restriction.
For example: export_fig('-jpg', '-pdf', '-png', ...)
Note: '-tif','-tiff' are equivalent, and so are '-jpg','-jpeg'.
-transparent - option indicating that the figure background is to be made
transparent (PNG,PDF,TIF,EPS,EMF formats only). Implies -noinvert.
-nocrop - option indicating that empty margins should not be cropped.
-c[<val>,<val>,<val>,<val>] - option indicating crop amounts. Must be
a 4-element vector of numeric values: [top,right,bottom,left]
where NaN/Inf indicates auto-cropping, 0 means no cropping, any
other value means cropping in pixel amounts. e.g. '-c7,15,0,NaN'
Note: this option is not supported by SVG and EMF formats.
-p<val> - option to pad a border of width val to exported files, where
val is either a relative size with respect to cropped image
size (i.e. p=0.01 adds a 1border). For EPS & PDF formats,
val can also be integer in units of 1/72" points (abs(val)>1).
val can be positive (padding) or negative (extra cropping).
If used, the -nocrop flag will be ignored, i.e. the image will
always be cropped and then padded. Default: 0 (i.e. no padding).
Note: this option is not supported by SVG and EMF formats.
-m<val> - option val indicates the factor to magnify the figure dimensions
when generating bitmap outputs (does not affect vector formats).
Default: '-m1' (i.e. val=1). Note: val~=1 slows down export_fig.
-r<val> - option val indicates the resolution (in pixels per inch) to
export bitmap and vector outputs, without changing dimensions of
the on-screen figure. Default: '-r864' (for vector output only).
Note: -m option overides -r option for bitmap exports only.
-native - option indicating that the output resolution (when outputting
a bitmap format) should be such that the vertical resolution
of the first suitable image found in the figure is at the
native resolution of that image. To specify a particular
image to use, give it the tag 'export_fig_native'.
Notes: This overrides any value set with the -m and -r options.
It also assumes that the image is displayed front-to-parallel
with the screen. The output resolution is approximate and
should not be relied upon. Anti-aliasing can have adverse
effects on image quality (disable with the -a1 option).
-a1, -a2, -a3, -a4 - option indicating the amount of anti-aliasing (AA) to
use for bitmap outputs, when GraphicsSmoothing is not available.
'-a1'=no AA; '-a4'=max. Default: 3 for HG1, 1 for HG2.
-<renderer> - option to force a particular renderer (painters, opengl or
[in R2014a or older] zbuffer). Default value: opengl for bitmap
formats or figures with patches and/or transparent annotations;
painters for vector formats without patches/transparencies.
-<colorspace> - option indicating which colorspace color figures should
be saved in: RGB (default), CMYK or gray. Usage example: '-gray'.
Note: CMYK is only supported in PDF, EPS and TIF formats.
-q<val> - option to vary bitmap image quality (PDF, EPS, JPG formats only).
A larger val, in the range 0-100, produces higher quality and
lower compression. val > 100 results in lossless compression.
Default: '-q95' for JPG, ghostscript prepress default for PDF,EPS.
Note: lossless compression can sometimes give a smaller file size
than the default lossy compression, depending on the image type.
-append - option indicating that if the file already exists the figure is to
be appended as a new page, instead of being overwritten (default).
PDF, TIF & GIF output formats only (multi-image GIF = animated).
-bookmark - option to indicate that a bookmark with the name of the
figure is to be created in the output file (PDF format only).
-clipboard - option to save output as an image on the system clipboard.
-clipboard<:format> - copies to clipboard in the specified format:
image (default), bitmap, emf, or pdf.
Notes: Only -clipboard (or -clipboard:image, which is the same)
applies export_fig parameters such as cropping, padding etc.
Only the emf format supports -transparent background
-clipboard:image create a bitmap image using export_fig processing
-clipboard:bitmap create a bitmap image as-is (no auto-cropping etc.)
-clipboard:emf is vector format without auto-cropping; Windows-only
-clipboard:pdf is vector format without cropping; not universally supported
-d<gs_option> - option to indicate a ghostscript setting. For example,
-dMaxBitmap=0 or -dNoOutputFonts (Ghostscript 9.15+).
-depsc - option to use EPS level-3 rather than the default level-2 print
device. This solves some bugs with Matlab's default -depsc2 device
such as discolored subplot lines on images (vector formats only).
-update - option to download and install the latest version of export_fig
-version - return the current export_fig version, without any figure export
-nofontswap - option to avoid font swapping. Font swapping is automatically
done in vector formats (only): 11 standard Matlab fonts are
replaced by the original figure fonts. This option prevents this.
-font_space <char> - option to set a spacer character for font-names that
contain spaces, used by EPS/PDF. Default: ''
-linecaps - option to create rounded line-caps (vector formats only).
-noinvert - option to avoid setting figure's InvertHardcopy property to
'off' during output (this solves some problems of empty outputs).
-preserve_size - option to preserve the figure's PaperSize property in output
file (PDF/EPS formats only; default is to not preserve it).
-options <optionsStruct> - format-specific parameters as defined in Matlab's
documentation of the imwrite function, contained in a struct under
the format name. For example to specify the JPG Comment parameter,
pass a struct such as this: options.JPG.Comment='abc'. Similarly,
options.PNG.BitDepth=4. Only used by PNG,TIF,JPG,GIF output formats.
Options can also be specified as a cell array of name-value pairs,
e.g. {'BitDepth',4, 'Author','Yair'} - these options will be used
by all supported output formats of the export_fig command.
-silent - option to avoid various warning and informational messages, such
as version update checks, transparency or renderer issues, etc.
-regexprep <old> <new> - replaces all occurances of <old> (a regular expression
string or array of strings; case-sensitive), with the corresponding
<new> string(s), in EPS/PDF files (only). See regexp function's doc.
Warning: invalid replacement can make your EPS/PDF file unreadable!
-toolbar - adds an interactive export button to the figure's toolbar
-menubar - adds an interactive export menu to the figure's menubar
handle - handle of the figure, axes or uipanels (can be an array of handles
but all the objects must be in the same figure) to be exported.
Default: gcf (handle of current figure).
figName - name (title) of the figure to export (e.g. 'Figure 1' or 'My fig').
Overriden by handle (if specified); Default: current figure
Outputs:
imageData - MxNxC uint8 image array of the exported image.
alpha - MxN single array of alphamatte values in the range [0,1],
for the case when the background is transparent.
Some helpful examples/tips are listed at: https://github.com/altmany/export_fig
See also PRINT, SAVEAS, ScreenCapture (on the Matlab File Exchange)
Copyright (C) Oliver Woodford 2008-2014, Yair Altman 2015-
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