Re: ReplacePart

*To*: mathgroup at smc.vnet.net*Subject*: [mg131639] Re: ReplacePart*From*: Bob Hanlon <hanlonr357 at gmail.com>*Date*: Sun, 15 Sep 2013 07:06:06 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-outx@smc.vnet.net*Delivered-to*: mathgroup-newsendx@smc.vnet.net*References*: <20130914100259.8EA2C6A1A@smc.vnet.net>

{5,10} is apparently interpreted as a position within an array rather than a list of positions. Not sure why the algorithm isn't able to resolve the ambiguity given that the input is a simple list. Or why there is no error stating that position {5,10} does not exist. x = {-1.25664, 0.628319, -0.628319, 1.25664, Indeterminate, -1.25664, 0.628319, -0.628319, 1.25664, Indeterminate}; x2 = x /. Indeterminate -> 0 {-1.25664, 0.628319, -0.628319, 1.25664, 0, -1.25664, 0.628319, -0.628319, \ 1.25664, 0} x2 == ReplacePart[x, {5 -> 0, 10 -> 0}] == ReplacePart[x, Thread[{5, 10} -> 0]] == ReplacePart[x, {{5} -> 0, {10} -> 0}] == ReplacePart[x, {{5}, {10}} -> 0] == ReplacePart[x, List /@ {5, 10} -> 0] == ReplacePart[x, Position[x, Indeterminate] -> 0] True Bob Hanlon On Sat, Sep 14, 2013 at 6:02 AM, man21 <man21 at free.fr> wrote: > Hello, > > As a result of a calculation, I end up with a list of numerical values > which contains some "Indeterminate". > > x ={-1.25664, 0.628319, -0.628319, 1.25664, Indeterminate, -1.25664, > 0.628319, -0.628319, 1.25664, Indeterminate} > > I try to replace the "Indeterminate" by "0", using : > > ReplacePart[x, {5, 10} -> 0.] > > but this dosen't work. Any idea why, and how to do it ? > > Thanks, > > Michel > > >

**References**:**ReplacePart***From:*man21 <man21@free.fr>