Re: Re: dynamicmodule with f[x_] possible?

*To*: mathgroup at smc.vnet.net*Subject*: [mg104554] Re: [mg104511] Re: [mg104470] dynamicmodule with f[x_] possible?*From*: Matthew Kooshad <matthewkooshad at gmail.com>*Date*: Wed, 4 Nov 2009 01:31:33 -0500 (EST)*References*: <18085121.1257066820723.JavaMail.root@n11> <005701ca5af2$c7c19ae0$5744d0a0$@net>

ok, thanks for the note about N@. any idea why it doesn't work to put the derivative (N@f'[x]) there rather than simply N@f[x] ? thanks! On Tue, Nov 3, 2009 at 2:16 PM, DrMajorBob <btreat1 at austin.rr.com> wrote: > anything@anythingElse is the same thing as anything[anythingElse]. Look u= p > "Prefix" in Help. > > It only works when "anything" accepts a single argument, of course. > > And yes... both versions need f defined (unless you want results in terms= of > an unknown f). > > Bobby > > On Tue, 03 Nov 2009 01:50:44 -0600, Matthew Kooshad > <matthewkooshad at gmail.com> wrote: > >> thanks a lot, David :) >> does the 2nd example need f[x] set above it too (like f[x_] := >> BesselI[1,x])? >> i tried the 2nd example without the f[x] set above it, and i replaced >> N@f[x] with N@f'[x] , but that didn't work to show the derivative. >> it's my first time to see this N@ syntax, so i'm not sure why it >> didn't show the derivative. any ideas? >> i wish for the derivative to be calculated each time i press enter in >> the text box based on whatever function is in the inputfield. >> thanks again, >> >> On Sun, Nov 1, 2009 at 6:56 AM, David Park <djmpark at comcast.net> wrote: >>> >>> For a simple case: >>> >>> f[x_] := BesselI[1, x] >>> >>> DynamicModule[ >>> {x = 0}, >>> Column[{ >>> Row[{"x: ", InputField[Dynamic[x], FieldSize -> {5, 1}]}], >>> Dynamic@Row[{"f[x]: ", N[f[x]]}] >>> }](* Column *) >>> ] >>> >>> For something like your example: >>> >>> DynamicModule[{x = 0, b = 0}, >>> Deploy[Style[ >>> Panel[Grid[ >>> Transpose[{{Style["x", Red], Style["b", Red], "sum", "diff", >>> "product"}, {InputField[Dynamic[x]], InputField[Dynamic[b]]= , >>> InputField[Dynamic[N@f[x] + b], Enabled -> False], >>> InputField[Dynamic[N@f[x] - b], Enabled -> False], >>> InputField[Dynamic[N@f[x] b], Enabled -> False]}}], >>> Alignment -> Right](* Grid *), >>> ImageMargins -> 10](* Panel *), >>> DefaultOptions -> {InputField -> {ContinuousAction -> True, >>> FieldSize -> {{5, 30}, {1, Infinity}}}} >>> ](* Style *) >>> ](* Deploy *) >>> ] >>> >>> >>> David Park >>> djmpark at comcast.net >>> http://home.comcast.net/~djmpark/ >>> >>> >>> From: matthew kooshad [mailto:matthewkooshad at gmail.com] >>> >>> hello, i would like to make f[x_] dynamic and based on input. >>> i've tried changing "a = 0" for example to f[_x] = 0 and replacing = all >>> other "a" with f[x], but no luck there. will someone please guide me >>> on this? thank you :) >>> >>> DynamicModule[{a = 0, b = 0}, >>> Deploy[Style[ >>> Panel[Grid[ >>> Transpose[{{Style["a", Red], Style["b", Red], >>> "sum", "diff", "product"}, {InputField[Dynamic[a]], >>> InputField[Dynamic[b]], >>> InputField[Dynamic[a + b], Enabled -> False], >>> InputField[Dynamic[a - b], Enabled -> False], >>> InputField[Dynamic[ab], Enabled -> False]}}], >>> Alignment -> Right], ImageMargins -> 10], >>> DefaultOptions -> {InputField -> {ContinuousAction -> True, >>> FieldSize -> {{5, 30}, {1, Infinity}}}}]]] >>> >>> >>> >> > > > -- > DrMajorBob at yahoo.com >

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**Re: Re: dynamicmodule with f[x_] possible?**