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Top Forums Shell Programming and Scripting Standard Deviation For Every "n" lines Post 302965322 by jacobs.smith on Wednesday 27th of January 2016 09:29:15 AM
Old 01-27-2016
Quote:
Originally Posted by jim mcnamara
What the code above does is to give you the stddev every forty lines - for ALL of the preceding records (thanks Ravinder)

Code:
rows 40 stddev x.xxx
rows 80 stddev x.xxx
......
rows 8000 stddev x.xxx

or did you mean to treat every 40 lines as a separate population of size 40, except possibly the END{} clause? - what RudiC shows except that the divisors should not be NR, rather 40 and the divisor in the END has to be calculated (maybe).

A clear description of what you want would help a lot.
Hi Jim,

Thank you for good thoughts.

What I meant was to treat every 40rows as a set.

Lines 1 to 40 as set1
Lines 41 to 80 as set2
.......

Ravi's reply was exactly what I was looking at.

Thank you @Rudic and everyone.
 

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fmt(1)							      General Commands Manual							    fmt(1)

NAME
fmt - format text SYNOPSIS
width] [file...] DESCRIPTION
The command is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the width option. The default width is 72. concatenates the arguments. If none are given, formats text from the standard input. Blank lines are preserved in the output, as is the spacing between words. does not fill lines beginning with a period for compatibility with Nor does it fill lines starting with Indentation is preserved in the output and input lines with differing indentation are not joined (unless is used). can also be used as an in-line text filter for the command: reformats the text between the cursor location and the end of the paragraph. Options recognizes the following options: Crown margin mode. Preserve the indentation of the first two lines within a paragraph and align the left margin of each subsequent line with that of the second line. This is useful for tagged paragraphs. Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such "formatted" text, from being unduly combined. Fill output lines to up to width columns. WARNINGS
The width option is acceptable for BSD compatibility, but it may go away in future releases. SEE ALSO
nroff(1), vi(1). fmt(1)
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