Re: InputField Rounding Problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg109477] Re: InputField Rounding Problem*From*: Chris Degnen <degnen at cwgsy.net>*Date*: Thu, 29 Apr 2010 02:52:20 -0400 (EDT)*References*: <hr65pi$jmr$1@smc.vnet.net> <hr6j4s$2t6$1@smc.vnet.net>

Yes, it's a funny one. If you want ContinuousAction to work you need the Number type. As well as rounding anomalies, with ContinuousAction the field pops in a -1 if you type a minus to start a negative number. I think ContinuousAction must be intended more for Manipulate and Slider, as mentioned in the docs. For demonstration: x = y = 69.6; Grid[{Join[{"Enter to update"}, {InputField[Dynamic[x], ContinuousAction -> True]}, {Framed[Item[Graphics[Text[Style[Dynamic[x], 12]], ImageSize -> {200, 20}]], FrameMargins -> 0]}], Join[{"Continuous"}, {InputField[Dynamic[y], Number, ContinuousAction -> True]}, {Framed[Item[Graphics[Text[Style[Dynamic[y], 12]], ImageSize -> {200, 20}]], FrameMargins -> 0]}]}] On 27 Apr, 12:51, telefunkenvf14 <rgo... at gmail.com> wrote: > On Apr 27, 3:04 am, Chris Degnen <deg... at cwgsy.net> wrote: > > > Hi. Any suggestions on how to stop the number type field below > > displaying input as 69.5999999...? Thanks > > > InputField[Dynamic[x], ImageSize -> {100, 20}, > > ContinuousAction -> True] > > x = 69.6 > > InputField[Dynamic[y], Number, ImageSize -> {100, 20}, > > ContinuousAction -> True] > > y = 69.6 > > If I evaluate: > > InputField[Dynamic[x], ImageSize -> {100, 20}, ContinuousAction -> > True] > > Input 69.6 in the field. Now click outside of the field and then type > and evaluate x > > In[179]:= x > Out[179]= 69.6 > > If you click in the output cell you'll see that x is in numerical > form, so I doubt you need to force InputField to display as Number. > (for underlying calculations, etc.) Although, I am a little confused > as to why your second example (using Number) would display all the > digits it does. If anything, shouldn't it be 69.600000000....? Seems > like a bug. > > Maybe someone else will chime in. > > -RG