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#include "nmath.h"
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#include "nmath.h"
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double rt(double df)
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double rt(double df)
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{
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{
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    if (ISNAN(df) || df <= 0.0)	ML_ERR_return_NAN;
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    if (ISNAN(df) || df <= 0.0)	ML_WARN_return_NAN;
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    if(!R_FINITE(df))
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    if(!R_FINITE(df))
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	return norm_rand();
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	return norm_rand();
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    else {
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    else {
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/* Some compilers (including MW6) evaluated this from right to left
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/* Some compilers (including MW6) evaluated this from right to left