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Re: How to print TraditionalForm without evaluation
*To*: mathgroup at smc.vnet.net
*Subject*: [mg92625] Re: How to print TraditionalForm without evaluation
*From*: Albert Retey <awnl at gmx-topmail.de>
*Date*: Thu, 9 Oct 2008 06:33:18 -0400 (EDT)
*References*: <gci1sm$iv$1@smc.vnet.net>
Serych Jakub wrote:
> I want to write notebook which prints simple integration examples with
> results for the students.
> Something like:
>
> ex1 = (1 - 3*x^3 + 2*x^5)/(4*x^3);
> ex2 = (-5*x^(1/4) + (x^2)^(4/3))/x^(3/2);
>
> Grid[{
> Table[
> TraditionalForm[Integrate[Symbol["ex" <> ToString[nr]], x]], {nr, 1, 2}],
> (* do not integrate this *)
> Table[
> TraditionalForm[Integrate[Symbol["ex" <> ToString[nr]], x]], {nr, 1, 2}]},
> (* integrate this *)
> Frame -> All, ItemStyle -> Directive[FontSize -> 18, Bold]]
>
> (there will be much more examples ex3,ex4, etc.)
>
> This works nice, but I need to tell Mathematica not to Integrate in the first
> row of the table - examples (only in the second one - results). Is there any
> possibility to suppress the evaluation of the Integral in the first row of
> the grid and just print the symbol of Integral and the TraditionalForm of the
> example behind it?
This is what I would do:
ex[1] = (1 - 3*x^3 + 2*x^5)/(4*x^3);
ex[2] = (-5*x^(1/4) + (x^2)^(4/3))/x^(3/2);
heldintegrate[expr_, x_] :=
With[{e = expr}, HoldForm[Integrate[e, x]]]
Grid[{Table[TraditionalForm[
heldintegrate[ex[nr], x]
], {nr, 1, 2}],(*do not integrate this*)
Table[TraditionalForm[Integrate[ex[nr], x]], {nr, 1,
2}]},(*integrate this*)Frame -> All,
ItemStyle -> Directive[FontSize -> 18, Bold]]
hth,
albert
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