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Top Forums Shell Programming and Scripting How to filter out data file...? Post 302741507 by Scrutinizer on Sunday 9th of December 2012 03:45:10 AM
Old 12-09-2012
If you have ksh93 that has floating point arithmetic, so you can do something like this:
Code:
{
  read header
  printf "%s\n" "$header"
  while read col1 col2 col3 col4 col5; do
    if [ $c1_min -lt $col1 ] && [ $c1_max -gt $col1 ] && 
       [ $c2_min -lt $col2 ] && [ $c2_max -gt $col2 ] &&
       [ $c3_min -lt $col3 ] && [ $c3_max -gt $col3 ]
    then 
      printf "%s\t%s\t%s\t%s\t%s\n" $col1 $col2 $col3 $col4 $col5
    fi
  done 
} < data_filter.txt

If you are using ksh93 then there are better ways of writing this, but you get the idea...


In other shells you would need to convert the values to integer first or use an external program like for example bc

For example, using parameter expansion:
Code:
{
  read header
  printf "%s\n" "$header"
  while read col1 col2 col3 col4 col5; do
    if [ $c1_min -lt ${col1%%.*} ] && [ $c1_max -gt ${col1%%.*} ] && 
       [ $c2_min -lt ${col2%%.*} ] && [ $c2_max -gt ${col2%%.*} ] &&
       [ $c3_min -lt ${col3%%.*} ] && [ $c3_max -gt ${col3%%.*} ]
    then 
      printf "%s\t%s\t%s\t%s\t%s\n" $col1 $col2 $col3 $col4 $col5
    fi
  done 
} < data_filter.txt


Last edited by Scrutinizer; 12-09-2012 at 05:05 AM..
 

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MYSQLI_STMT_BIND_RESULT(3)						 1						MYSQLI_STMT_BIND_RESULT(3)

mysqli_stmt::bind_result - Binds variables to a prepared statement for result storage

       Object oriented style

SYNOPSIS
bool mysqli_stmt::bind_result (mixed &$var1, [mixed &$...]) DESCRIPTION
Procedural style bool mysqli_stmt_bind_result (mysqli_stmt $stmt, mixed &$var1, [mixed &$...]) Binds columns in the result set to variables. When mysqli_stmt_fetch(3) is called to fetch data, the MySQL client/server protocol places the data for the bound columns into the speci- fied variables $var1, .... Note Note that all columns must be bound after mysqli_stmt_execute(3) and prior to calling mysqli_stmt_fetch(3). Depending on column types bound variables can silently change to the corresponding PHP type. A column can be bound or rebound at any time, even after a result set has been partially retrieved. The new binding takes effect the next time mysqli_stmt_fetch(3) is called. PARAMETERS
o $ stmt -Procedural style only: A statement identifier returned by mysqli_stmt_init(3). o $var1 - The variable to be bound. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Object oriented style <?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world"); if (mysqli_connect_errno()) { printf("Connect failed: %s ", mysqli_connect_error()); exit(); } /* prepare statement */ if ($stmt = $mysqli->prepare("SELECT Code, Name FROM Country ORDER BY Name LIMIT 5")) { $stmt->execute(); /* bind variables to prepared statement */ $stmt->bind_result($col1, $col2); /* fetch values */ while ($stmt->fetch()) { printf("%s %s ", $col1, $col2); } /* close statement */ $stmt->close(); } /* close connection */ $mysqli->close(); ?> Example #2 Procedural style <?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (!$link) { printf("Connect failed: %s ", mysqli_connect_error()); exit(); } /* prepare statement */ if ($stmt = mysqli_prepare($link, "SELECT Code, Name FROM Country ORDER BY Name LIMIT 5")) { mysqli_stmt_execute($stmt); /* bind variables to prepared statement */ mysqli_stmt_bind_result($stmt, $col1, $col2); /* fetch values */ while (mysqli_stmt_fetch($stmt)) { printf("%s %s ", $col1, $col2); } /* close statement */ mysqli_stmt_close($stmt); } /* close connection */ mysqli_close($link); ?> The above examples will output: AFG Afghanistan ALB Albania DZA Algeria ASM American Samoa AND Andorra SEE ALSO
mysqli_stmt_get_result(3), mysqli_stmt_bind_param(3), mysqli_stmt_execute(3), mysqli_stmt_fetch(3), mysqli_prepare(3), mysqli_stmt_pre- pare(3), mysqli_stmt_init(3), mysqli_stmt_errno(3), mysqli_stmt_error(3). PHP Documentation Group MYSQLI_STMT_BIND_RESULT(3)
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