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Full Discussion: How to join multiple files?
Top Forums Shell Programming and Scripting How to join multiple files? Post 302406716 by theFinn on Tuesday 23rd of March 2010 04:48:57 PM
Old 03-23-2010
How to join multiple files?
I am trying to join a few hundred files using join. Is there a way to use while read or something else to automate this. My problem is the following.

Day 1
Code:
City Temp
ABC    20
DEF    30
HIJ     15

Day 2
Code:
City  Temp
ABC    22
DEF    29
KLM     5

Day 3
Code:
City  Temp
 ABC    24
 DEF    27
 KLM     8

And so on for a few hundred days.

I am trying to make a file that looks like this
Code:
ABC  20,22,24
DEF  30,29,27
HIJ   15,,
KLM  ,5,8

My command looks like this:
Code:
join -t',' -j 2 -a1 -a2 -o 0 1.3 2.3 file1.csv file2.csv

where the common identifier is in column 2 (-j2) and the value i want to amend my master file with is always in column 3 (-o 1.3 2.3). I'm trying to avoid running this command over and over again, as the -o option keeps on growing (-o 1.3 1.4 2.3 --> -0 1.3 1.4 1.5 2.3 --> -o 1.3 1.4 1.5 1.6 2.3 --> -o 1.3 1.4 1.5...1.n 2.3, where n=~200)

Is there a way to use while read or something else to make the file?

Your help is much appreciated.

Thanks.
Last edited by zaxxon; 03-24-2010 at 09:33 AM.. Reason: use code tags please, ty
 

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LEARN ABOUT CENTOS

tk_getjoinstyle

Tk_GetJoinStyle(3)					       Tk Library Procedures						Tk_GetJoinStyle(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tk_GetJoinStyle, Tk_NameOfJoinStyle - translate between strings and join styles

SYNOPSIS

       #include <tk.h>

       int
       Tk_GetJoinStyle(interp, string, joinPtr)

       const char *
       Tk_NameOfJoinStyle(join)

ARGUMENTS

       Tcl_Interp *interp (in)		 Interpreter to use for error reporting.

       const char *string (in)		 String containing name of join style: one of "bevel", "miter", or "round".

       int *joinPtr (out)		 Pointer to location in which to store X join style corresponding to string.

       int join (in)			 Join style: one of JoinBevel, JoinMiter, JoinRound.
_________________________________________________________________

DESCRIPTION

       Tk_GetJoinStyle places in *joinPtr the X join style corresponding to string, which will be one of JoinBevel, JoinMiter, or JoinRound.  Join
       styles are typically used in X graphics contexts to indicate how adjacent line segments should be joined together.  See the X documentation
       for information on what each style implies.

       Under  normal circumstances the return value is TCL_OK and interp is unused.  If string does not contain a valid join style or an abbrevia-
       tion of one of these names, then an error message is stored in interp->result, TCL_ERROR is returned, and *joinPtr is unmodified.

       Tk_NameOfJoinStyle is the logical inverse of Tk_GetJoinStyle.  Given a join style such  as  JoinBevel  it  returns  a  statically-allocated
       string corresponding to join.  If join is not a legal join style, then "unknown join style" is returned.

KEYWORDS

       bevel, join style, miter, round

Tk																Tk_GetJoinStyle(3)
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