how do use patch in the background?

I know matlab has patch function, which is patch(X,Y,Z,C) creates a patch in 3-D coordinates. If the coordinate data does not define closed polygons, patch closes the polygons. The data can define concave or intersecting polygons. However, if the edges of an individual patch face intersect themselves, the resulting face might be only partly filled. In that case, it is better to divide the face into smaller polygons.

I can use it to plot my figure normally, but the question is I need to do this work in the background (something like use patch to plot the figure(no display), then save the figure as jpg or eps in the background, then only display the jpg or eps.)

can anyone help me? Thanks,

LZ

Answer 1

[Liang Zhan]

I run the code in unix background, and the main code is:

h=figure('Visible','off');

for i=1:256

for j=1:256

 patch(XX, YY, ZZ,C,'LineStyle', 'none');

end

end

saveas(h,'figure_test_no_display.jpg');

then it come out a very long error message, which I can not post here.

[Walter Roberson]

What error message does it come out with?

[Liang Zhan]

------------------------------------------------------------------------

Segmentation violation detected at Fri Apr 8 14:33:43 2011

------------------------------------------------------------------------

Configuration:

MATLAB Version: 7.4.0.287 (R2007a)

MATLAB License: 95863

Operating System: Linux 2.6.9-89.0.9.ELsmp #1 SMP Mon Aug 24 07:59:15 EDT 2009 x86_64

GNU C Library: 2.3.4 stable

Window System: No active display

Current Visual: None

Virtual Machine: Java 1.5.0_04 with Sun Microsystems Inc. Java HotSpot(TM) 64-Bit Server VM mixed mode

Default Charset: US-ASCII

Register State:

rax = 0000000001583040 rbx = 0000000000bf46b0

rcx = 3ff0000000000000 rdx = 0000000000000000

rbp = 0000007fbfe00010 rsi = 0000000001583040

rdi = 0000002a9dcc4a60 rsp = 0000007fbfdffff0

r8 = 0000000000000000 r9 = 0000000000000009

r10 = 0000007fbfff5701 r11 = 0000002a98cafa90

r12 = 0000002a9dcc4a60 r13 = 0000002a9dcc4a60

r14 = 0000007fbfff5970 r15 = 0000000000000000

rip = 0000002a9a9ea7d3 flg = 0000000000010206

Stack Trace:

[0] libmwhardcopy.so:psStringDescent(105, 0, 0x00bf46b0, 0x2a9dcc4a60) + 99 bytes

[1] libmwgui.so:wm_StringDescent(WinRec_tag*)(0, 0, 0x00bf46b0, 0x2a9dcc4a60) + 86 bytes

.....

[Walter Roberson]

I ran the code with XX, YY, ZZ, and C each set to different rand(1,53), and had no problems in 2008b on Linux-64.

[Liang Zhan]

yes, in normal, this code is fine, and has no problem,

but I run this code in unix "background",and it come out these errors.

[Liang Zhan]

forgot to mention, I use R2007a

[Walter Roberson]

How exactly are you running in the background ?

[Liang Zhan]

[e-mail][31]% matlab

Warning: Unable to open display , MATLAB is starting without a display.

You will not be able to display graphics on the screen.

< M A T L A B >

Copyright 1984-2007 The MathWorks, Inc.

Version 7.4.0.287 (R2007a)

January 29, 2007

Warning: Name is nonexistent or not a directory: /usr/lshare/prog/pub/spm/spm2.

Warning: Name is nonexistent or not a directory: /usr/lshare/prog/pub/spm/spm2.

To get started, type one of these: helpwin, helpdesk, or demo.

For product information, visit www.mathworks.com.

>> ODF_plot

then it come out those error message

[Walter Roberson]

Undefined function or variable sphere_tri

The missing mask.mat and ack1.mat are also going to cause problems for other people wishing to debug your code.

[Walter Roberson]

I tried switching to

set(h,'Renderer','painters')

in my sample code. It is taking a long time to execute; hard to say yet ha terminate.

[Liang Zhan]

let me test in my side.

where should I add set(h,'Renderer','painters')?

just before

saveas(h,'figure_test_no_display.jpg')?

thanks,

[Liang Zhan]

it shows error

Warning: RGB color data not yet supported in Painter's mode.

> In /usr/local/matlab-7.4-1_64bit/toolbox/matlab/graphics/private/render.p>render at 144

In print at 267

In saveas at 159

In ODF_plot at 89

Warning: RGB color data not yet supported in Painter's mode.

> In /usr/local/matlab-7.4-1_64bit/toolbox/matlab/graphics/private/render.p>render at 144

In print at 267

In saveas at 159

In ODF_plot at 89

Warning: RGB color data not yet supported in Painter's mode.

> In /usr/local/matlab-7.4-1_64bit/toolbox/matlab/graphics/private/render.p>render at 144

In print at 267

In saveas at 159

In ODF_plot at 89

[Walter Roberson]

Have you tried the Matlab File Exchange contribution export_fig ?

[Liang Zhan]

no, but I will try it now

[Liang Zhan]

Wow~, it works very well, thanks a lot for your suggestion. It solved me a big problem, appreciate!!!