Date: Tue, 29 Nov 2011 14:22:56 -0600 (CST)
From: Tim McDaniel <tmcd@panix.com>
cc: cygwin@cygwin.com
Subject: Re: Illegal character ^M
In-Reply-To: <32881791.post@talk.nabble.com>
Message-ID: <Pine.NEB.4.64.1111291416260.19989@panix3.panix.com>
References: <32881791.post@talk.nabble.com>
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On Tue, 29 Nov 2011, frenco wrote:
> I have a variable that is a float value.
> When I print it with the echo command i get:
> 0.495959
...
> I think it's because my variable have the ^M character (not printed
> with the echo command)

You might try
     echo "[$the_variable_name]"
The quoting is significant.  If it does have a carriage return like
you think, then it will probably display like
     ].495959
That is, the ^M will probably make it go back to the start of the
line, and characters after it (here, ]) will overwrite what it output
before.

> But when I try to make an operation on that value with the bc
> command (I am not sure how to write the bc command).
> echo $mean *1000 |bc
...
> How can i eliminate this error?

     echo $mean *1000 | tr -d '\r' | bc
seems to work.  "tr" translates characters, "-d" says that instead of
translating it should just delete the name characters, and '\r' (note:
single quote ', not double quote ") is the ^M character.

-- 
Tim McDaniel

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