input x,h 
 DFRIDR=   1.000000       1.000000      1.1920929E-07
 input x,h 
 DFRIDR=   3.425523       3.425519      4.2915344E-06
 input x,h 
 DFRIDR=   3.425528       3.425519      1.6689301E-06
 input x,h 
 DFRIDR=   199.8570       199.8501      1.0009766E-02
 input x,h