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Shell Programming and Scripting
Match files based on either of the two columns awk
Post 302827487 by smitra on Friday 28th of June 2013 09:06:10 PM
06-28-2013
sorry DGPickett, I tried such a way also but as sometimes I have to match with 2nd col (see the last example) also, it getts messed 
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LEARN ABOUT OPENDARWIN
spline
spline(1) User Commands spline(1) NAME
spline - interpolate smooth curve SYNOPSIS
spline [-aknpx] ... DESCRIPTION
spline takes pairs of numbers from the standard input as abcissas and ordinates of a function. It produces a similar set, which is approxi- mately equally spaced and includes the input set, on the standard output. The cubic spline output (R. W. Hamming, Numerical Methods for Scientists and Engineers,2nd ed., 349ff) has two continuous derivatives, and sufficiently many points to look smooth when plotted, for example by graph(1). OPTIONS
-a Supply abscissas automatically (they are missing from the input); spacing is given by the next argument, or is assumed to be 1 if next argument is not a number. -k The constant k used in the boundary value computation (2nd deriv. at end) = k*(2nd deriv. next to end) is set by the next argument. By default k = 0. -n Space output points so that approximately n intervals occur between the lower and upper x limits. (Default n = 100.) -p Make output periodic, that is, match derivatives at ends. First and last input values should normally agree. -x Next 1 (or 2) arguments are lower (and upper) x limits. Normally these limits are calculated from the data. Automatic abcissas start at lower limit (default 0). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWesu | +-----------------------------+-----------------------------+ SEE ALSO
graph(1), attributes(5) R. W. Hamming, Numerical Methods for Scientists and Engineers, 2nd ed. DIAGNOSTICS
When data is not strictly monotonic in x, spline reproduces the input without interpolating extra points. BUGS
A limit of 1000 input points is enforced silently. SunOS 5.10 14 Sep 1992 spline(1)