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Full Discussion: How get only required lines & delete the rest of the lines in file
Top Forums UNIX for Dummies Questions & Answers How get only required lines & delete the rest of the lines in file Post 302426129 by reva on Tuesday 1st of June 2010 01:24:03 AM
Old 06-01-2010
Question How get only required lines & delete the rest of the lines in file
Hiiii
I have a file which contains huge data as
a.dat:
HTML Code:
 PDE 1990  1  9 18 51 28.90  24.7500   95.2800 118.0 6.1 0.0 BURMA
event name:     010990D
time shift:      7.3000
half duration:   5.0000
latitude:       24.4200
longitude:      94.9500
depth:         129.6000
Mrr:       2.016000e+25
Mtt:      -1.576000e+25
Mpp:      -4.390000e+24
Mrt:      -2.089000e+25
Mrp:      -1.011000e+25
Mtp:       1.012000e+25

 PDE 1990  1 10 11 53 21.20  11.6000   95.1900  33.0 5.3 5.4 ANDAMAN ISLANDS REGION
event name:     011090D
time shift:      1.6000
half duration:   2.5000
latitude:       11.7100
longitude:      95.0300
depth:          61.0000
Mrr:      -2.770000e+23
Mtt:      -2.288000e+24
Mpp:       2.565000e+24
Mrt:       6.300000e+22
Mrp:      -1.190000e+24
Mtp:       6.836000e+24

 PDE 1990  1 22 17 26 12.10   3.8500   96.1000  51.0 6.0 0.0 NORTHERN SUMATERA
event name:     012290D
time shift:      7.1000
half duration:   5.0000
latitude:        3.5500
longitude:      95.9300
depth:          50.1000
Mrr:       1.837000e+25
Mtt:      -1.010000e+25
Mpp:      -8.270000e+24
Mrt:       1.084000e+25
Mrp:      -1.030000e+25
Mtp:       1.330000e+25

 PDE 1990  2  5  5 16 45.10  37.0700   71.2700 102.0 6.1 0.0 AFGHANISTAN-USSR BORDER
event name:     020590A
time shift:      8.4000
half duration:   4.9000
latitude:       36.5600
longitude:      70.8400
depth:         113.5000
Mrr:       1.749000e+25
Mtt:      -2.940000e+25
Mpp:       1.191000e+25
Mrt:      -7.030000e+24
Mrp:      -1.093000e+25
Mtp:      -5.500000e+23
I just want to retain first line & delete rest of the lines in the file
THe output file should be like
b.dat
Code:
 PDE 1990  1  9 18 51 28.90  24.7500   95.2800 118.0 6.1 0.0 BURMA
 PDE 1990  1 10 11 53 21.20  11.6000   95.1900  33.0 5.3 5.4 ANDAMAN ISLANDS
 PDE 1990  1 22 17 26 12.10   3.8500   96.1000  51.0 6.0 0.0 NORTHERN SUMATERA
 PDE 1990  2  5  5 16 45.10  37.0700   71.2700 102.0 6.1 0.0 AFGHANISTAN-USSR BORDER

Help me out.....
 

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LEARN ABOUT PHP

date_sun_info

DATE_SUN_INFO(3)							 1							  DATE_SUN_INFO(3)

date_sun_info - Returns an array with information about sunset/sunrise and twilight begin/end

SYNOPSIS

       array date_sun_info (int  $time, float  $latitude, float  $longitude)

DESCRIPTION

PARAMETERS

	      o $time
		- Timestamp.

	      o $latitude
		- Latitude in degrees.

	      o $longitude
		- Longitude in degrees.

RETURN VALUES

	Returns array on success or FALSE on failure.

EXAMPLES

       Example #1

	      A date_sun_info(3) example

	      <?php
	      $sun_info = date_sun_info(strtotime("2006-12-12"), 31.7667, 35.2333);
	      foreach ($sun_info as $key => $val) {
		  echo "$key: " . date("H:i:s", $val) . "
";
	      }
	      ?>

	      The above example will output:

	      sunrise: 05:52:11
	      sunset: 15:41:21
	      transit: 10:46:46
	      civil_twilight_begin: 05:24:08
	      civil_twilight_end: 16:09:24
	      nautical_twilight_begin: 04:52:25
	      nautical_twilight_end: 16:41:06
	      astronomical_twilight_begin: 04:21:32
	      astronomical_twilight_end: 17:12:00

SEE ALSO

       date_sunrise(3), date_sunset(3).

PHP Documentation Group 													  DATE_SUN_INFO(3)
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