Pls explain your input file. I read it in a way that col 1 is sth. like a row no., and col 2 has data in it, mostly 2s and 3s, with one 7 in between. The output you show has absolutely nothing to do with this input file. Pls provide the desired output from that input file. I'd guess sth like
and so on. Pls confirm or present different example.
I have a m X n matrix written out to file, say like this:
1,2,3,4,5,6
2,6,3,10,34,67
1,45,6,7,8,8
I want to calculate the column averages in the MINIMUM amount of code or processing possible. I would have liked to use my favorite tool, "AWK" but since it processes rowwise, getting the... (5 Replies)
Howdy,
I need to convert an association data matrix, currently in a two-column format, into a matrix with numbers indicating the number of associations. I've been looking around for AWK code in the list, but could not find anything. Here's an example of what I want to perform:
original... (10 Replies)
Hi All,
I have a huge matrix file consisting some some millions rows and 6000 columns. The contents are just floating point numbers in the matrix. I want to extract each column (i.e. 6000 of them) and store each column in a separate file.
For example, 1.dat will consist of elements from column... (4 Replies)
Hi all,
Is there a way to convert full data matrix to linearised left data matrix?
e.g full data matrix
Bh1 Bh2 Bh3 Bh4 Bh5 Bh6 Bh7
Bh1 0 0.241058 0.236129 0.244397 0.237479 0.240767 0.245245
Bh2 0.241058 0 0.240594 0.241931 0.241975 ... (8 Replies)
Greetings, salutations.
I have a 3 column csv file with ~13 million rows and I would like to generate a correlation matrix. Interestingly, you all previously provided a solution to the inverse of this problem. Thread title: "awk? adjacency matrix to adjacency list / correlation matrix to list"... (6 Replies)
Hello!
I'm new to linux programming. It would be great if you could help me out.
I have a matrix of kind:
10 30.0
20 190.5
40 180.
50 320.5
I would like
to substract 180 from column 2 If the value is >180
to add 180 for column 2 If the value is <180
nothing if it is equal to... (3 Replies)
Dear all,
I'm new in perl scripting and I'm trying to creating a matrix from a 3 column file sorting data in a particular manner. In the final matrix I need to have the first column "IDs" on the header of the columns and the second column values on the header of each row. And the value fo the... (2 Replies)
Hi, Is it possible to transpose the matrix like this using awk ? Many thanks in advance
Input
abc Name_1 0
abc Name_2 1
abc Name_3 2
abc Name_4 0.4
def Name_1 0
def Name_2 9
def Name_3 78
def Name_4 1
Output
abc def
Name_1 0 ... (4 Replies)
Discussion started by: quincyjones
4 Replies
LEARN ABOUT PHP
pdostatement.execute
PDOSTATEMENT.EXECUTE(3) 1 PDOSTATEMENT.EXECUTE(3)PDOStatement::execute - Executes a prepared statement
SYNOPSIS
public bool PDOStatement::execute ([array $input_parameters])
DESCRIPTION
Execute the prepared statement. If the prepared statement included parameter markers, you must either:
ocall PDOStatement.bindParam(3) to bind PHP variables to the parameter markers: bound variables pass their value as input and
receive the output value, if any, of their associated parameter markers
oor pass an array of input-only parameter values
PARAMETERS
o $input_parameters
- An array of values with as many elements as there are bound parameters in the SQL statement being executed. All values are
treated as PDO::PARAM_STR. You cannot bind multiple values to a single parameter; for example, you cannot bind two values to a
single named parameter in an IN() clause. You cannot bind more values than specified; if more keys exist in $input_parameters
than in the SQL specified in the PDO::prepare, then the statement will fail and an error is emitted.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.2.0 | |
| | |
| | The keys from $input_parameters must match the |
| | ones declared in the SQL. Before PHP 5.2.0 this |
| | was silently ignored. |
| | |
+--------+---------------------------------------------------+
EXAMPLES
Example #1
Execute a prepared statement with bound variables
<?php
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < :calories AND colour = :colour');
$sth->bindParam(':calories', $calories, PDO::PARAM_INT);
$sth->bindParam(':colour', $colour, PDO::PARAM_STR, 12);
$sth->execute();
?>
Example #2
Execute a prepared statement with an array of insert values (named parameters)
<?php
/* Execute a prepared statement by passing an array of insert values */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < :calories AND colour = :colour');
$sth->execute(array(':calories' => $calories, ':colour' => $colour));
?>
Example #3
Execute a prepared statement with an array of insert values (placeholders)
<?php
/* Execute a prepared statement by passing an array of insert values */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < ? AND colour = ?');
$sth->execute(array($calories, $colour));
?>
Example #4
Execute a prepared statement with question mark placeholders
<?php
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < ? AND colour = ?');
$sth->bindParam(1, $calories, PDO::PARAM_INT);
$sth->bindParam(2, $colour, PDO::PARAM_STR, 12);
$sth->execute();
?>
Example #5
Execute a prepared statement using array for IN clause
<?php
/* Execute a prepared statement using an array of values for an IN clause */
$params = array(1, 21, 63, 171);
/* Create a string for the parameter placeholders filled to the number of params */
$place_holders = implode(',', array_fill(0, count($params), '?'));
/*
This prepares the statement with enough unnamed placeholders for every value
in our $params array. The values of the $params array are then bound to the
placeholders in the prepared statement when the statement is executed.
This is not the same thing as using PDOStatement::bindParam() since this
requires a reference to the variable. PDOStatement::execute() only binds
by value instead.
*/
$sth = $dbh->prepare("SELECT id, name FROM contacts WHERE id IN ($place_holders)");
$sth->execute($params);
?>
NOTES
Note
Some drivers require to close cursor before executing next statement.
SEE ALSO PDO.prepare(3), PDOStatement.bindParam(3), PDOStatement.fetch(3), PDOStatement.fetchAll(3), PDOStatement.fetchColumn(3).
PHP Documentation Group PDOSTATEMENT.EXECUTE(3)