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/* util.h */
/*--------------------------------------------------------------------*/
/*
--------------------------------------------------------------------
sort and count observations of two integers.
input
nobs -- # of observations
x[] -- vector of first components of observations
y[] -- vector of second components of observations
output
pndistinct -- pointer to hold # of distinct observations
pxdistinct -- pointer to hold first components of the
distinct observations
pydistinct -- pointer to hold second components of the
distinct observations
pcounts -- pointer to hold counts of the distinct observations
created -- 95sep30, cca
--------------------------------------------------------------------
*/
void
IV2sortAndCount (
int nobs,
int x[],
int y[],
int *pndistinct,
int **pxdistinct,
int **pydistinct,
int **pcounts
) ;
/*--------------------------------------------------------------------*/
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