input x,h 
 DFRIDR=   1.000000       1.000000      1.1920929E-07
 input x,h 
 DFRIDR=   3.425524       3.425518      3.0994415E-06
 input x,h 
 DFRIDR=   3.425528       3.425518      1.9073486E-06
 input x,h 
 DFRIDR=   199.8568       199.8501      9.4909668E-03
 input x,h