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Top Forums Shell Programming and Scripting Script to solve second order (polynomial) interpolation Post 302759213 by Tzeronone on Monday 21st of January 2013 11:02:33 PM
Old 01-22-2013
Quote:
Originally Posted by Chubler_XL
How about this:

Code:
awk '
{ P[$1]=$2 ; m=$1>m?$1:m; x[NR]=$1 ; y[NR]=$2 }
END {
    for(i=1;i<=m;i++) {
       if (i in P) printf "%0.4f %0.4f\n", i, P[i];
       else printf "%0.4f %0.4f\n", i, \
           (((i-x[2]) * (i-x[3])) / ((x[1]-x[2]) * (x[1]-x[3]))) * y[1] + \
           (((i-x[1]) * (i-x[3])) / ((x[2]-x[1]) * (x[2]-x[3]))) * y[2] + \
           (((i-x[1]) * (i-x[2])) / ((x[3]-x[1]) * (x[3]-x[1]))) * y[3] ;
    }
}' infile

It is working but shows the wrong result, thus it remains dissolved. Any how, thanks.
 

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END(7)								   SQL Commands 							    END(7)

NAME
END - commit the current transaction SYNOPSIS
END [ WORK | TRANSACTION ] DESCRIPTION
END commits the current transaction. All changes made by the transaction become visible to others and are guaranteed to be durable if a crash occurs. This command is a PostgreSQL extension that is equivalent to COMMIT [commit(7)]. PARAMETERS
WORK TRANSACTION Optional key words. They have no effect. NOTES
Use ROLLBACK [rollback(7)] to abort a transaction. Issuing END when not inside a transaction does no harm, but it will provoke a warning message. EXAMPLES
To commit the current transaction and make all changes permanent: END; COMPATIBILITY
END is a PostgreSQL extension that provides functionality equivalent to COMMIT [commit(7)], which is specified in the SQL standard. SEE ALSO
BEGIN [begin(7)], COMMIT [commit(7)], ROLLBACK [rollback(7)] SQL - Language Statements 2010-05-14 END(7)
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