add numerical recipes library

lib/nr/ansi/recipes/f1dim.c

@@ -0,0 +1,19 @@
+
+#define NRANSI
+#include "nrutil.h"
+
+extern int ncom;
+extern float *pcom,*xicom,(*nrfunc)(float []);
+
+float f1dim(float x)
+{
+	int j;
+	float f,*xt;
+
+	xt=vector(1,ncom);
+	for (j=1;j<=ncom;j++) xt[j]=pcom[j]+x*xicom[j];
+	f=(*nrfunc)(xt);
+	free_vector(xt,1,ncom);
+	return f;
+}
+#undef NRANSI