The first row in the desired output (C1 C1 1) is the correlation between column 2 and column 2 which is a correlation of1 as it is the same data. The second row in the desired output (C1 C2 -0.4) is the correlation between column 2 and column 3 etc.
Last edited by Scrutinizer; 11-21-2018 at 05:25 PM..
Reason: Code Tags
Hello,
With the following small script I list the size of documents belonging to a certain user by each time selecting the bytes-field of that file ($7). Now it fills the array with every file it finds so in the end the output of some users contains up to 200.000 numbers. So how can I calculate... (7 Replies)
I have about 5000 columns of data that i need to convert all of it into pecentages. for shorter colums i have been using this code:
{print $1/($1+$2)*100,$2/($1+$2),$3/($3+$4)*100 .....}
but this is a teadious process... is there anyway to do it without having to write all of them out?
sample... (20 Replies)
Hi All,
I have a txt file which has hundreds of lines and 41 fields. I have a requirement to pick up field 14 from the text file which is a date fiels in the following format.
Field 14 :
Data Type : NUMERIC DATE (YYYYMMDD)
Field Length : 8
Example of Data :20090415
Field 42 :
Data Type... (2 Replies)
Hey guys, maybe you can help me with this...
I want to read input.dat line by line, while doing a simple calculation between the second column value of the current line and the second column value of the next line (like a difference).
input is something like this:
0 3.945757
1 ... (1 Reply)
I would like to extract a number from $0 and calculate if it can be devided by 25. Though the number can also be less then 25 or bigger than 100. How do i extract the number and how can the integer be calculated?
String:
"all_results">39</span>I am looking for the number between "all_results"> ... (5 Replies)
Hi All,
IS there any 'awk' way to manipulate following data?
Fruit Date Count
Apple 20/08/2011 5
Apple 27/08/2011 7
Apple 05/09/2011 11
Apple 12/09/2011 3
Apple 19/09/2011 25
.
.
.
.
Orange 20/08/2011 9
Orange 27/08/2011 20
Orange 27/08/2011 7
Orange 05/09/2011 15
Orange... (3 Replies)
Hi All,
I have the following time stamp data in 2 columns
Date TimeStamp(also with milliseconds)
05/23/2012 08:30:11.250
05/23/2012 08:30:15.500
05/23/2012 08:31.15.500
.
.
etc
From this data I need the following output.
0.00( row1-row1 in seconds)
04.25( row2-row1 in... (5 Replies)
Hi all,
I am attempting to calculate a running variance for a file containing a column of numbers. I am using the formula variance=sum((x-mean(x))^2)/(n-1), where x is the value on the current row, and mean(x) is the average of all of the values up until that row. n represents the total number... (1 Reply)
Hi, I wanted to calculate cumulative frequency distribution of my data that involves several arithmetic calls. I did things in excel but its taking me forever. this is what I want to do:
var1.txt contains n observations which I have to compute for frequency which is given by 1/n and subsequently... (7 Replies)
Discussion started by: ida1215
7 Replies
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spi_modifytuple
SPI_MODIFYTUPLE(3) PostgreSQL 9.2.7 Documentation SPI_MODIFYTUPLE(3)NAME
SPI_modifytuple - create a row by replacing selected fields of a given row
SYNOPSIS
HeapTuple SPI_modifytuple(Relation rel, HeapTuple row, int ncols,
int * colnum, Datum * values, const char * nulls)
DESCRIPTION
SPI_modifytuple creates a new row by substituting new values for selected columns, copying the original row's columns at other positions.
The input row is not modified.
ARGUMENTS
Relation rel
Used only as the source of the row descriptor for the row. (Passing a relation rather than a row descriptor is a misfeature.)
HeapTuple row
row to be modified
int ncols
number of column numbers in the array colnum
int * colnum
array of the numbers of the columns that are to be changed (column numbers start at 1)
Datum * values
new values for the specified columns
const char * Nulls
which new values are null, if any (see SPI_execute_plan for the format)
RETURN VALUE
new row with modifications, allocated in the upper executor context; NULL only if row is NULL
On error, SPI_result is set as follows:
SPI_ERROR_ARGUMENT
if rel is NULL, or if row is NULL, or if ncols is less than or equal to 0, or if colnum is NULL, or if values is NULL.
SPI_ERROR_NOATTRIBUTE
if colnum contains an invalid column number (less than or equal to 0 or greater than the number of column in row)
PostgreSQL 9.2.7 2014-02-17 SPI_MODIFYTUPLE(3)