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Full Discussion: how to do decimal arithmetic in shell script
Top Forums Shell Programming and Scripting how to do decimal arithmetic in shell script Post 302686259 by sam05121988 on Tuesday 14th of August 2012 08:02:13 AM
Old 08-14-2012
MySQL how to do decimal arithmetic in shell script
hi,

I have a file with decimal/non-decimal values
Code:
$ cat b22
373 164 92 62 20 131 94 12 129 111 95 154 37 15 447 25 7.4 135 77 122 32 92 70 57 37 42 72 17 13 97 40 41 53 22 80 71 29 87 23 31 273 6.2 12K 43 44 45 22 11 7.7 13 18 173 36 20 18 13 56 67 104 53 5.4 241 19 13 3.8 38 14 31 329 16 155 17 81 74 18 45 110 58 23 4.0 13 33 6.9 32 68 28 22 34 139 60 31 22 101 12 13 105 14 19 109 11 6.6 65 44 9.0 132 221 16 16 166 11 76 46 38 42 18 87 68 29 5.4 3.4 41 32 27 406 275 35 24 26 49 5.2 19 146 60 41 12 7.9 77 14 15 24 29 98 24 98 187 56 96 9.5 46 60 24 25 169 196 13 37 16 50 76 12 181 12 74 8.2 26 112 21 12 86 41 1.5 2.3 130 8.2 415 36 24 18 52 54 17 11 8.1 9.2 101 15 85 44 43 107 21 19 111 6.2 26 42 15 39 116 33 49 60 20 127 7.6 55 84 87 34 32 22 21 66 102 29 14 20 7.7 27 22 12 25 138 45 6.4 40 18 34 103 22 18 64 106 121 7.7 16 75 9.3 7.9 23 4.8 28 40 63 23 50 3.4 14 1.5 24 5.4 9.2 16 73 34 150 13 41 120 127 260 4.3 147 14 29

I am trying to add these values
however, expr and let would fail
Code:
 
expr: non-numeric argument

Code:
 
-bash: let: a=1.2+2.8: syntax error: invalid arithmetic operator

I am trying to add these with this code
Code:
 
$ $sum=0; for i in `cat b22`
> do
> sum=`echo "$sum + $i" | bc`
> done; echo $sum;

but it throws the following error 256 times [same asthe no. of values in file b22]
Code:
(standard_in) 1: parse error

 

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LEARN ABOUT MOJAVE

platform::shell

platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME

       platform::shell - System identification support code and utilities

SYNOPSIS

       package require platform::shell ?1.1.4?

       platform::shell::generic shell
       platform::shell::identify shell
       platform::shell::platform shell
_________________________________________________________________

DESCRIPTION

       The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell.

       This  package  allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only
       requirement is that the other shell (identified by its path), is actually executable on the current machine.

       While for most platform this means that the architecture of the interrogated shell is identical to the architecture of  the  running  shell
       this  is  not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run
       32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers.

       For applications like a code repository it is important to identify the architecture of the shell which will  actually  run  the  installed
       packages, versus the architecture of the shell running the repository software.

COMMANDS

       platform::shell::identify shell
	      This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::generic shell
	      This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::platform shell
	      This command returns the contents of tcl_platform(platform) for the specified Tcl shell.

KEYWORDS

       operating system, cpu architecture, platform, architecture

platform::shell 						       1.1.4							platform::shell(n)
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