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Old 22nd May 2009, 23:19   #48  |  Link
Wilbert
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Join Date: Nov 2001
Location: Netherlands
Posts: 6,364
Spline100:

Code:
> w0:=coeff(w,y0); w1:=coeff(w,y1); w2:=coeff(w,y2); w3:=coeff(w,y3); w4:=coeff(w,y4);

                              3    209   2    362
                 w0 := 1/153 x  - ----- x  + ----- x
                                  13515      40545


                               3   418   2    724
                 w1 := - 2/51 x  + ---- x  - ----- x
                                   4505      13515


                              3   1672  2   2896
                  w2 := 8/51 x  - ---- x  + ----- x
                                  4505      13515


                           10  3   1254  2   724
                   w3 := - -- x  + ---- x  - --- x
                           17      901       901


                      61  3   9893  2
                w4 := -- x  - ---- x  - 1/13515 x + 1
                      51      4505
Spline144:
Code:
> w0:=coeff(w,y0); w1:=coeff(w,y1); w2:=coeff(w,y2); w3:=coeff(w,y3); w4:=coeff(w,y4); w5:=coeff(w,y5);

                              3    2340   2    1351
               w0 := - 1/571 x  + ------ x  - ------ x
                                  564719      564719


                             3   14040   2    8106
                w1 := 6/571 x  - ------ x  + ------ x
                                 564719      564719


                        24   3   56160   2   32424
                w2 := - --- x  + ------ x  - ------ x
                        571      564719      564719


                       90   3   210600  2   121590
                 w3 := --- x  - ------ x  + ------ x
                       571      564719      564719


                        336  3   786240  2   453936
                w4 := - --- x  + ------ x  - ------ x
                        571      564719      564719


                    683  3   1240203  2
              w5 := --- x  - ------- x  - 3/564719 x + 1
                    571      564719
The weights sum up to one for both splines (including their symmetric counterparts), so i suspect that they are correct.
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