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)
Hi friends
I have 100 files in my directory. Each file look like this..
Temp1 Temp2 Temp3
MAS 1 2 3
MAS 4 5 6
MAS 7 8 9
Delhi 10 11 12
Delhi 13 14 15
Delhi 16 17 ... (4 Replies)
Hi Friends,
In continuation to my earlier post
https://www.unix.com/shell-programming-scripting/99166-script-find-average-given-column-also-specified-number-rows.html
I am extending my problem as follows.
Input:
Column1 Column2
MAS 1
MAS 4 ... (2 Replies)
Dear users,
I need your support, I have a file like this:
272134.548 6680572.715
272134.545 6680572.711
272134.546 6680572.713
272134.548 6680572.706
272134.545 6680572.721
272134.543 6680572.710
272134.544 6680572.715
272134.543 6680572.705
272134.540 6680572.720
272134.544... (10 Replies)
Dear Gurus,
I have tab-delimited text files with matrix containing values. The first column is a identifier and other columns have the corresponding values. I would like to calculate the average value (total number/number of entries) for all entries from 2nd column to the last column in row... (3 Replies)
I have a dataset with 120 columns. I would like to write a script, that takes the average of every two columns, starting from columns 2 and 3, and moving consecutively in frames of 3 columns, all the way until the last column.
The first column in the output file would be the averages of columns... (1 Reply)
Hi,
My input file
Gene1 1
Gene1 2
Gene1 3
Gene1 0
Gene2 0
Gene2 0
Gene2 4
Gene2 8
Gene3 9
Gene3 9
Gene4 0
Condition:
If the first column matches, then look in the second column. If there is a value of zero in the second column, then don't consider that record while averaging.
... (5 Replies)
Hi Friends,
My input file
Gene1 10 20 0
Gene2 5 0 15
Gene3 10 10 10
Gene4 5 0 0
If there is a zero for any gene in any column, I don't want that column to be considered which reduces the denominator value during average.
Here is my output
Gene1 10 20 0 10
Gene2 5 0 15 10
Gene3... (5 Replies)
I have no idea how to even get started with this script.
I need to average field 3 for each of the unique identifiers found in field 1. However, I only want to average these rows when field 2 is equal to 1506 - 2000 (note that i replaced the values field 2 for security reasons, but the real... (6 Replies)
Discussion started by: ncwxpanther
6 Replies
LEARN ABOUT DEBIAN
dispatch_apply
dispatch_apply(3) BSD Library Functions Manual dispatch_apply(3)NAME
dispatch_apply -- schedule blocks for iterative execution
SYNOPSIS
#include <dispatch/dispatch.h>
void
dispatch_apply(size_t iterations, dispatch_queue_t queue, void (^block)(size_t));
void
dispatch_apply_f(size_t iterations, dispatch_queue_t queue, void *context, void (*function)(void *, size_t));
DESCRIPTION
The dispatch_apply() function provides data-level concurrency through a "for (;;)" loop like primitive:
dispatch_queue_t the_queue = dispatch_get_concurrent_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT);
size_t iterations = 10;
// 'idx' is zero indexed, just like:
// for (idx = 0; idx < iterations; idx++)
dispatch_apply(iterations, the_queue, ^(size_t idx) {
printf("%zu
", idx);
});
Like a "for (;;)" loop, the dispatch_apply() function is synchronous. If asynchronous behavior is desired, please wrap the call to
dispatch_apply() with a call to dispatch_async() against another queue.
Sometimes, when the block passed to dispatch_apply() is simple, the use of striding can tune performance. Calculating the optimal stride is
best left to experimentation. Start with a stride of one and work upwards until the desired performance is achieved (perhaps using a power
of two search):
#define STRIDE 3
dispatch_apply(count / STRIDE, queue, ^(size_t idx) {
size_t j = idx * STRIDE;
size_t j_stop = j + STRIDE;
do {
printf("%zu
", j++);
} while (j < j_stop);
});
size_t i;
for (i = count - (count % STRIDE); i < count; i++) {
printf("%zu
", i);
}
FUNDAMENTALS
Conceptually, dispatch_apply() is a convenient wrapper around dispatch_async() and a semaphore to wait for completion. In practice, the dis-
patch library optimizes this function.
The dispatch_apply() function is a wrapper around dispatch_apply_f().
SEE ALSO dispatch(3), dispatch_async(3), dispatch_queue_create(3), dispatch_semaphore_create(3)Darwin May 1, 2009 Darwin