MathGroup Archive 2009

[Date Index] [Thread Index] [Author Index]

Search the Archive

question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg105655] question
  • From: Piotr Munik <piotr.munik at gmail.com>
  • Date: Mon, 14 Dec 2009 00:05:21 -0500 (EST)

I have a problem with BSpline Function.
I want to know how can I make derivative of BSplineFunction.
Example
I have date:
A = {{35460.`, 3679.0872`}, {35460.69264747737`,
  3687.7503846982163`}, {35461.28773994215`,
  3692.3961023958045`}, {35461.806871210974`,
  3694.2412898524603`}, {35462.26724874828`,
  3694.153846663659`}, {35462.68278354234`,
  3692.751661338148`}, {35463.064844684086`,
  3690.4735944025206`}, {35463.42275907352`,
  3687.6306750451413`}, {35463.764140416955`,
  3684.443207780651`}, {35464.09511694083`,
  3681.06769769011`}, {35464.42050735041`,
  3677.616304426622`}, {35464.74397598101`,
  3674.1707494759285`}, {35465.06818332038`,
  3670.7920866860404`}, {35465.39493765232`,
  3667.5274013715157`}, {35465.725347137995`,
  3664.414261219639`}, {35466.05996825088`,
  3661.483561387575`}, {35466.3989453914`,
  3658.761262965816`}, {35466.74213684692`,
  3656.2694059318`}, {35467.089223399555`,
  3654.026678876124`}, {35467.43979743582`,
  3652.0487455457387`}, {35467.793431899845`,
  3650.3484613388064`}, {35468.149729802935`,
  3648.936060393955`}, {35468.508356050195`,
  3647.8193546780835`}, {35468.86905403582`,
  3647.003958999106`}, {35469.231649893`,
  3646.493538377201`}, {35469.59604735504`,
  3646.2900647088964`}, {35469.962216097105`,
  3646.3940662134573`}, {35470.33017615164`,
  3646.8048539002734`}, {35470.699980580255`,
  3647.5207126272817`}, {35471.071698196596`,
  3648.5390489346887`}, {35471.44539764735`,
  3649.8564926946046`}, {35471.8211337682`,
  3651.468954045882`}, {35472.19893675605`,
  3653.3716406325216`}, {35472.57880436523`,
  3655.5590426339295`}, {35472.96069710453`,
  3658.024894452097`}, {35473.34453622771`,
  3660.7621222927396`}, {35473.73020415663`,
  3663.7627864213086`}, {35474.11754694328`,
  3667.018025827071`}, {35474.506378305014`,
  3670.51801158167`}, {35474.89648479548`,
  3674.251913569262`}, {35475.2876317024`,
  3678.2078836490937`}, {35475.67956928002`,
  3682.3730568207175`}, {35476.07203902216`,
  3686.7335707090747`}, {35476.46477969639`,
  3691.274602688824`}, {35476.857532946524`,
  3695.9804232725514`}, {35477.25004832435`,
  3700.834463961712`}, {35477.64208764039`,
  3705.8193975690688`}, {35478.03342858835`,
  3710.9172290329852`}, {35478.42386763393`,
  3716.1093948886532`}, {35478.81322216143`,
  3721.3768697843334`}, {35479.201331936965`, 3726.7002787009123`}};
and I have a BSplineFunction:
In[1] fn = BSplineFunction[A, SplineDegree -> 3]
Out[1] BSplineFunction[{{0.,1.}},<>]
I need derivative of function from Out[1]
Thank You
Piotr



  • Follow-Ups:
  • Prev by Date: Re: Re: Return in function
  • Next by Date: which algorithms are used within Solve[]?
  • Previous by thread: Re: Finding simplest Fourier series between two given Fourier series
  • Next by thread: Re: question