README file
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To extract the data files, 

 unzip CSV_files.zip

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One folder CSV_files contains the following data files (csv)

density_of_zeros_data.csv  data file for Fig.4
fixedjb_n.csv		   data file for Fig. 7b
periodic_01.csv	  	   data file for Fig. 7a
periodic_02.csv    	   data file for Fig. 7c

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