>> drva
------------ 11.1.3 a -------------
  t           y      y true
0.1  1.40843171  1.40834155
0.2  1.02226375  1.02214040
0.3  0.78331775  0.78319232
0.4  0.65103904  0.65092714
0.5  0.59722789  0.59713617
0.6  0.60234998  0.60228009
0.7  0.65295283  0.65290384
0.8  0.73985699  0.73982679
0.9  0.85688993  0.85687604
1.0  1.00000000  1.00000000
------------ 11.1.3 b -------------
   t           y       ytrue
1.00 -0.50000000 -0.50000000
1.05 -0.31133020 -0.31132607
1.10 -0.15691415 -0.15690801
1.15 -0.02915423 -0.02914729
1.20  0.07760211  0.07760914
1.25  0.16761752  0.16762427
1.30  0.24414679  0.24415306
1.35  0.30970384  0.30970953
1.40  0.36625115  0.36625623
1.45  0.41533600  0.41534047
1.50  0.45818961  0.45819349
1.55  0.49580025  0.49580358
1.60  0.52896762  0.52897044
1.65  0.55834384  0.55834619
1.70  0.58446450  0.58446641
1.75  0.60777249  0.60777401
1.80  0.62863645  0.62863761
1.85  0.64736507  0.64736590
1.90  0.66421836  0.66421889
1.95  0.67941656  0.67941681
2.00  0.69314718  0.69314718
>>