Hi All,
          I have a data set ( only a portion) as follows:
   No.     x1         x2         x3        y1          y2        y3          y4
   1   0.200000   0.200000   0.200000   0.765685    75881.9    29289.3   -46592.6
   2   0.200345   0.200000   0.200345   0.766661    75766.0    29268.4   -46497.6
   3   0.200000   0.200345   0.200000   0.766030    75867.1    29259.8   -46607.4
   4   0.359575   0.253987   0.359575   1.271019    43898.7    19675.6   -24223.1
   5   0.359921   0.253987   0.359921   1.271995    43861.3    19666.1   -24195.2

This data set has to be filtered using the following conditions ( example only. in 
reality this can be anything):

0.2 < x1 < 0.3
y1 > 0.8
15000 < y3 < 30000

I have to filter the data set satisfying all the conditions. 

Can somebody help me out to do the same. Any help in this regard is solicited.

Thanks
Regards
Guruguhan
EACoE, India.


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