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Full Discussion: Abnormality while piping tr command output to sed
Top Forums Shell Programming and Scripting Abnormality while piping tr command output to sed Post 302746495 by chidori on Wednesday 19th of December 2012 01:16:45 PM
Old 12-19-2012
Abnormality while piping tr command output to sed
i have a file seperated each line seperated by newline. For example
Code:
alpha
beta
gamma

i am trying to replace the newlines to "," but dont want , present at the end of the line so i am trying the below one liner . but not sure whats wrong but its not working
cat myfile | tr -s '\n' ',' | sed 's/,$//'

But when i try it this way , its working
echo "alpha,beta,gamma," | sed 's/,$//'

can someone please explain me this behaviour.
 

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LEARN ABOUT DEBIAN

zlagtm

zlagtm.f(3)							      LAPACK							       zlagtm.f(3)

NAME

       zlagtm.f -

SYNOPSIS

   Functions/Subroutines
       subroutine zlagtm (TRANS, N, NRHS, ALPHA, DL, D, DU, X, LDX, BETA, B, LDB)
	   ZLAGTM

Function/Subroutine Documentation
   subroutine zlagtm (characterTRANS, integerN, integerNRHS, double precisionALPHA, complex*16, dimension( * )DL, complex*16, dimension( * )D,
       complex*16, dimension( * )DU, complex*16, dimension( ldx, * )X, integerLDX, double precisionBETA, complex*16, dimension( ldb, * )B,
       integerLDB)
       ZLAGTM

       Purpose:

	    ZLAGTM performs a matrix-vector product of the form

	       B := alpha * A * X + beta * B

	    where A is a tridiagonal matrix of order N, B and X are N by NRHS
	    matrices, and alpha and beta are real scalars, each of which may be
	    0., 1., or -1.

       Parameters:
	   TRANS

		     TRANS is CHARACTER*1
		     Specifies the operation applied to A.
		     = 'N':  No transpose, B := alpha * A * X + beta * B
		     = 'T':  Transpose,    B := alpha * A**T * X + beta * B
		     = 'C':  Conjugate transpose, B := alpha * A**H * X + beta * B

	   N

		     N is INTEGER
		     The order of the matrix A.  N >= 0.

	   NRHS

		     NRHS is INTEGER
		     The number of right hand sides, i.e., the number of columns
		     of the matrices X and B.

	   ALPHA

		     ALPHA is DOUBLE PRECISION
		     The scalar alpha.	ALPHA must be 0., 1., or -1.; otherwise,
		     it is assumed to be 0.

	   DL

		     DL is COMPLEX*16 array, dimension (N-1)
		     The (n-1) sub-diagonal elements of T.

	   D

		     D is COMPLEX*16 array, dimension (N)
		     The diagonal elements of T.

	   DU

		     DU is COMPLEX*16 array, dimension (N-1)
		     The (n-1) super-diagonal elements of T.

	   X

		     X is COMPLEX*16 array, dimension (LDX,NRHS)
		     The N by NRHS matrix X.

	   LDX

		     LDX is INTEGER
		     The leading dimension of the array X.  LDX >= max(N,1).

	   BETA

		     BETA is DOUBLE PRECISION
		     The scalar beta.  BETA must be 0., 1., or -1.; otherwise,
		     it is assumed to be 1.

	   B

		     B is COMPLEX*16 array, dimension (LDB,NRHS)
		     On entry, the N by NRHS matrix B.
		     On exit, B is overwritten by the matrix expression
		     B := alpha * A * X + beta * B.

	   LDB

		     LDB is INTEGER
		     The leading dimension of the array B.  LDB >= max(N,1).

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 145 of file zlagtm.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.1							  Sun May 26 2013						       zlagtm.f(3)
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