I'm Sorry I Haven't a Clue to make any decisions this year at least. Certainly I don't envisage us selecting anyone on a permanent basis for several series." It was announced that the show would continue recording beginning in 2009. The first new shows would be hosted by rotating guest presenters (similarly to the format of "Have I Got News for You") before a permanent replacement host was decided. In the "Clue" mailout for February 2009 Naismith announced that Stephen Fry, Jack Dee and Rob Brydon would host two shows each, to be recorded in April, May and June 2009 respectively. The programme returned on 15
I-spline I-spline In the mathematical subfield of numerical analysis, an I-spline is a monotone spline function. A family of "I-spline" functions of degree "k" with "n" free parameters is defined in terms of the M-splines "M"("x"|"k", "t") where "L" is the lower limit of the domain of the splines. Since M-splines are non-negative, "I-splines" are monotonically non-decreasing. Let "j" be the index such that "t" ≤ "x" < "t". Then "I"("x"|"k", "t") is zero if "i" > "j", and equals one if "j" − "k" + 1 > "i". Otherwise, "I-splines" can be used as basis splines for regression analysis and