I have some files with the following contents.I would like to calculate average of fifth column. How can I do this with awk?
I used the following code to calculate average. But the output is wrong.
Saying "the output is wrong" doesn't help us much. What, in the output you are getting, is wrong? With your sample input, what output are you trying to get? The output you said you want does not show the sum of values for each animal nor the average value for each animal (except for animals that only appear in one of your input files). Are you trying to prints animal sums in the output, or animal averages?
What values are you trying to average in your final line of output? Are you trying to calculate the average of all of the input values (which seems to be what your code is doing)? Are you trying to calculate the average of the averages for each animal? Are you trying to calculate the average of the sums for each animal?
This is the cronjob
----------------------
root@a7germ:/home/paxtemp > crontab -l|grep test
57 * * * * /home/paxtemp/test_1.sh
0,5,10,15,20,25,30,35,40,45,50,55 * * * * /home/paxtemp/test.sh
root@a7germ:/home/paxtemp >
This is the contents of test.sh script... (2 Replies)
Hi All
I like to know how can we calculate the number of rows and the average of the values present in the file. I will not know what will be the rowcount, which will be dynamic in nature of the file.
eg.
29
33
48
30
28 (6 Replies)
Dear all,
i have 200 values in a file. How can i calculate a weighted average and output into a new file avg.dat?
INPUT:
file1.dat
1.3453
2.434
2.345
.....
OUTPUT:
avg.dat
file1: 1.762
Thanks.
Po (3 Replies)
Hey guys.....
I have many files (lets say 100 or more) of same size, and I want to create a new output file and calculate the average of first row fifth column in all files and print it in first row of output file, then 2nd row fifth col in all 100 files and print it in 2nd row of output... (1 Reply)
Is there an awk script that can easily perform the following operation?
I have a data file that is in the format of
1944-12,5.6
1945-01,9.8
1945-02,6.7
1945-03,9.3
1945-04,5.9
1945-05,0.7
1945-06,0.0
1945-07,0.0
1945-08,0.0
1945-09,0.0
1945-10,0.2
1945-11,10.5
1945-12,22.3... (3 Replies)
Hi
I have file like below
111,victor,48,12,36
342,Peter,54,58,30
476,Scott,25,36,48
567,Patty,74,17,95
I have written below code to calcualte avereage for every id
Victor = 48+12+36/3
#!/bin/ksh
/usr/xpg4/bin/awk '
BEGIN {FS=","} {sum=0; n=0;i=3 (1 Reply)
Can anyone explain what each line of the code does and how it works? I have no experience with python so I am not sure how the arrays and such work. I found this code while looking through the forums.
f = open("exams","r")
l = f.readline()
while l:
l = l.split(" ")
values = l
... (22 Replies)
Discussion started by: totoro125
22 Replies
LEARN ABOUT PHP
db2_prepare
DB2_PREPARE(3) 1 DB2_PREPARE(3)db2_prepare - Prepares an SQL statement to be executedSYNOPSIS
resource db2_prepare (resource $connection, string $statement, [array $options])
DESCRIPTION db2_prepare(3) creates a prepared SQL statement which can include 0 or more parameter markers ( ? characters) representing parameters for
input, output, or input/output. You can pass parameters to the prepared statement using db2_bind_param(3), or for input values only, as an
array passed to db2_execute(3).
There are three main advantages to using prepared statements in your application:
o Performance: when you prepare a statement, the database server creates an optimized access plan for retrieving data with that
statement. Subsequently issuing the prepared statement with db2_execute(3) enables the statements to reuse that access plan and
avoids the overhead of dynamically creating a new access plan for every statement you issue.
o Security: when you prepare a statement, you can include parameter markers for input values. When you execute a prepared statement
with input values for placeholders, the database server checks each input value to ensure that the type matches the column defini-
tion or parameter definition.
o Advanced functionality: Parameter markers not only enable you to pass input values to prepared SQL statements, they also enable
you to retrieve OUT and INOUT parameters from stored procedures using db2_bind_param(3).
PARAMETERS
o $connection
- A valid database connection resource variable as returned from db2_connect(3) or db2_pconnect(3).
o $statement
- An SQL statement, optionally containing one or more parameter markers..
o $options
- An associative array containing statement options. You can use this parameter to request a scrollable cursor on database servers
that support this functionality. For a description of valid statement options, see db2_set_option(3).
RETURN VALUES
Returns a statement resource if the SQL statement was successfully parsed and prepared by the database server. Returns FALSE if the data-
base server returned an error. You can determine which error was returned by calling db2_stmt_error(3) or db2_stmt_errormsg(3).
EXAMPLES
Example #1
Preparing and executing an SQL statement with parameter markers
The following example prepares an INSERT statement that accepts four parameter markers, then iterates over an array of arrays con-
taining the input values to be passed to db2_execute(3).
<?php
$animals = array(
array(0, 'cat', 'Pook', 3.2),
array(1, 'dog', 'Peaches', 12.3),
array(2, 'horse', 'Smarty', 350.0),
);
$insert = 'INSERT INTO animals (id, breed, name, weight)
VALUES (?, ?, ?, ?)';
$stmt = db2_prepare($conn, $insert);
if ($stmt) {
foreach ($animals as $animal) {
$result = db2_execute($stmt, $animal);
}
}
?>
SEE ALSO db2_bind_param(3), db2_execute(3), db2_stmt_error(3), db2_stmt_errormsg(3).
PHP Documentation Group DB2_PREPARE(3)