Basic Condor Script for Running a Mandelbrot, stolen from https://computing.ee.ethz.ch/Services/Condor

mandelbrot.condor

##################################################################
##
## Mandelbrot pictures with MATLAB and Condor
##	Filename: mandelbrot.condor
##
##################################################################

#
# For this example, variables not used by Condor are marked my_*
#

universe	= vanilla
getenv		= True		# MATLAB needs local environment

#initialdir	= /home/foo/src/matlab
my_prefix	= Mandel

#
# Seek max floating point performance
#
Rank		= Kflops

#
# Mandelbrot Constants
#
my_procs	= 30
my_res		= 512
my_x		= 0.87485
my_y		= 0.75145
my_log_r0	= 1.5
my_log_r1	= -12

#
# MATLAB does all the math there,
# Condor just does string substitution
#
my_log_r	= ( $(my_log_r0) + ($(my_log_r1) - $(my_log_r0))*$(Process)/$(my_procs) )
my_r		= exp( $(my_log_r) )
my_x1		= ( $(my_x) - $(my_r) )
my_x2		= ( $(my_x) + $(my_r) )
my_y1		= ( $(my_y) - $(my_r) )
my_y2		= ( $(my_y) + $(my_r) )

#
# The name of the image file we want MATLAB to write
#
my_file		= $(my_prefix).$(Process).jpg

#
# For MATLAB and other SEPP packages, the executable must be a script wrapper.
#
executable	= mandelbrot.sh
arguments	= mandelplot($(my_res), $(my_x1), $(my_x2), $(my_y1), $(my_y2), '$(my_file)')

#
# To redirect stdout and/or stderr to /dev/null, comment these out.
#
log		= $(my_prefix).log
output		= $(my_prefix).$(Process).out
error		= $(my_prefix).$(Process).err

#
# Lastly, tell condor how many jobs to queue up.
#
queue $(my_procs)

mandelbrot.m

%
%	Filename: mandelbrot.m
%
function [m]=mandelbrot(edge,x1,x2,y1,y2)
maxloop=64;
maxsize=16;
if edge<1
   edge=10;
end
m=zeros(edge);
ystep=(y2-y1)/edge;
xstep=(x2-x1)/edge;
iy=1;
for y=y1:ystep:y2
   ix=1;
   for x=x1:xstep:x2
      mx=x;
      my=y;
      for i=1:maxloop
         realnum=mx*mx;
         imagnum=my*my;
         if(realnum+imagnum)>maxsize
            break
         end
         my=(mx*my)+y;
         mx=(realnum-imagnum)*.5 +x;
      end
      m(iy,ix)=maxloop-i;
      ix=ix+1;
   end
   iy=iy+1;
end

mandelbrot.sh

#!/bin/sh
#
#	Filename: mandelbrot.sh

#
# We use a shell wrapper for two reasons:
#
#   1)	By using "$*" we ensure that the matlab command string is
#	passed as a single argument even if it contains spaces.
#
#   2)	Condor changes argv[0], which causes problems for SEPP.  Hence,
#	whenever we run a program from /usr/sepp/bin/* we must use a
#	shell script wrapper.
#
exec /usr/sepp/bin/matlab  -nojvm -nodisplay -nodesktop -nosplash -r "$*"

mandelplot.m

%
%	Filename: mandelplot.m
%
function mandelplot(edge,x1,x2,y1,y2,filename)
x=[x1:(x2-x1)/edge:x2];
y=[y1:(y2-y1)/edge:y2];
m=zeros(edge);
m=mandelbrot(edge,x1,x2,y1,y2);

%clf;surf(x,y,m)
%axis tight;
%shading interp; map=colormap;
%map(1,3)=0;
%colormap(map);
%view(2)

imwrite(m,filename);