NAME:
	generate_from_files
 PURPOSE:
	Takes in all the input files and makes databases, webpages and plots
	This program uses ~xmmssc/public_html/xidops/fields_status.txt or a 
	similar file to find the input files it needs.
	If some input data is absent then that part of the program is ignored
	The program checks the directories for placing ouput files are there 
	and creates them if they are not (using a csh script
        ~xmmssc/soft/php/mk_outdirs.csh)
 CATEGORY:

 CALLING SEQUENCE:
	generate_from_files[,infile=infile,field_name=field_name,$
		xmm_list=xmm_list,offmax=offmax,offmax_apm=offmax_apm]
 OPTIONAL INPUT KEYWORDS
 	infile: text file containing the file names of inputs. Default is
		~xmmssc/public_html/xidops/fields_status.txt
	field_name: name of field to treat (from those listed in infile)
		case insensitive. Asked for if not given 
	xmm_list: type of list to choose if there are several
		case insensitive. Asked for if not given and there are several
	offmax: maximum offset for XMM/WFC/CIRSI matches 
		default is 5, arcsecs, max 30
	offmax_apm: maximum offset for XMM/APM matches
		default is 6, arcsecs, max 100
 
 DEPENDENCIES:

 The input files should be correctly named (when applicable) and placed in 
 directories as decribed in: 
 http://www.ast.cam.ac.uk/~xmmssc/xidops/dir_structure.html

 RESTRICTIONS

 Currently thew whole thing only works if there is XMM 52 and WFC i data

 CALLED PROCEDURES:
 astrolib functions
 rd_to_vector
 dbcreate_xmm
 dbcreate_cirsi
 dbcreate_wfc_mer
 dbcreate_wfc_unmer
 dbcreate_apm
 plot_lognlogs_5bands
 plot_hardness
 plot_xf52_wfc
 i_gi_wfc
 ug_gi_wfc
 ug_gr_wfc
 ri_gr_wfc
 g_ug_wfc
 stat_cl_wfc
 diffmag_wfc
 diffmag_byclass
 posangle_wfc
 posangle_byclass
 ellip_wfc
 ellip_byclass
 dotplot_wfc
 mkgif
 mkhtml_table
 mkgif_xmm
 mkgif_cirsi
 mkgif_wfc
 mkhtml_gif
 mkhtml_table_apm
 mkgif_poss1
 mkgif_poss2
 mkhtml_gif_apm

 
 MODIFICATION HISTORY:
	08-Nov-2000  Original by Suzanne Aigrain
	10-Jan-20001 S. Aigrain: use fields_status.txt as input, check and 
		create output dir. structure

(See /home/xmmssc/soft/idl/pro/generate_from_files.pro)