Hi
I want to sum of 3 columns in file.
Example: I want to sum of 3 ,6,8 th columns in file(SUM(3,6,8)).
Using awk can sum of single column
awk '{a+=$3} END {printf ("%f\n",a)' file_name
Thanks inadvance
MR (2 Replies)
Hello everyone I need to write a script that sums numbers passed to it as arguments on the command line and displays the results. I must use a for loop and then rewrite it using a while loop. It would have to output something like 10+20+30=60
this is what I have so far
fafountain@hfc:~$ vi sum... (1 Reply)
Hi
i data looks like this:
student 1
Subject1 45 55
Subject2 44 55
Subject3 33 44
//
student 2
Subject1 45 55
Subject2 44 55
Subject3 33 44
i would like to sum $2, $3 (marks) and divide each entry in $2 and $3 with their respective sums and print for each student as $4 and... (2 Replies)
Hi
I need to incorporate a 'sum' as follows into a script and not sure how. I have a variable per line and I need them to be summed, e.g below
1
23
1,456
1
1
34
46
How do I calculate the sum of all these numbers to ouptut the answer ( 1,562)
Thanks in advance (3 Replies)
I am trying to get the sum of the first column of a file. When I use the same method for other files it works just fine... for some reason for the file below it gives me an error that I don't understand... I tried looking at different lines of the file and tried different things, but I still... (7 Replies)
I have a list of values ( in Kb) I have the following code to sum up the values and convert the total to GB
cat list
701368101370
101370101370
801554101370
701636101370
101757101370
101876101370
901951101370
And this is the output of my script
awk '{ s += $1 } END {... (3 Replies)
Hi Friends,
I have a file with fields separated with comma. How to print sum of each field of the file?
Eg:
input file
1,3,6,7
2,1,2,1
0,1,1,0
I want to sum each field separately.
Output file
3,5,9,8
Thanks,
Suresh (2 Replies)
HI Guys,
I gave Input file F.Txt
ID H1 H2 H3 H4 H5
A 5 6 7 8 9
B 4 65 4 4 7
C 4 4 4 4 4
D 4 4 4 4 4
Output :-
ID H1 H2 H3 H4 H5
Total 17 79 19 20 24
Sum of Each Columns (8 Replies)
Discussion started by: pareshkp
8 Replies
LEARN ABOUT PHP
eval
EVAL(3) 1 EVAL(3)eval - Evaluate a string as PHP codeSYNOPSIS
mixed eval (string $code)
DESCRIPTION
Evaluates the given $code as PHP.
Caution
The eval(3) language construct is very dangerous because it allows execution of arbitrary PHP code. Its use thus is discouraged.
If you have carefully verified that there is no other option than to use this construct, pay special attention not to pass any user
provided data into it without properly validating it beforehand.
PARAMETERS
o $code
- Valid PHP code to be evaluated. The code mustn't be wrapped in opening and closing PHP tags, i.e. 'echo "Hi!";' must be passed
instead of '<? echo "Hi!"; >'. It is still possible to leave and reenter PHP mode though using the appropriate PHP tags, e.g.
'echo "In PHP mode!"; ?>In HTML mode!<? echo "Back in PHP mode!";'. Apart from that the passed code must be valid PHP. This
includes that all statements must be properly terminated using a semicolon. 'echo "Hi!"' for example will cause a parse error,
whereas 'echo "Hi!";' will work. A return statement will immediately terminate the evaluation of the code. The code will be exe-
cuted in the scope of the code calling eval(3). Thus any variables defined or changed in the eval(3) call will remain visible
after it terminates.
RETURN VALUES eval(3) returns NULL unless return is called in the evaluated code, in which case the value passed to return is returned. If there is a
parse error in the evaluated code, eval(3) returns FALSE and execution of the following code continues normally. It is not possible to
catch a parse error in eval(3) using set_error_handler(3).
EXAMPLES
Example #1
eval(3) example - simple text merge
<?php
$string = 'cup';
$name = 'coffee';
$str = 'This is a $string with my $name in it.';
echo $str. "
";
eval("$str = "$str";");
echo $str. "
";
?>
The above example will output:
This is a $string with my $name in it.
This is a cup with my coffee in it.
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
Tip
As with anything that outputs its result directly to the browser, the output-control functions can be used to capture the output of
this function, and save it in a string (for example).
Note
In case of a fatal error in the evaluated code, the whole script exits.
SEE ALSO call_user_func(3).
PHP Documentation Group EVAL(3)