Re: Create jpg image files of mathematical equations

*To*: mathgroup at smc.vnet.net*Subject*: [mg102546] Re: Create jpg image files of mathematical equations*From*: David Reiss <dbreiss at gmail.com>*Date*: Thu, 13 Aug 2009 03:21:10 -0400 (EDT)*References*: <h5okvi$sn$1@smc.vnet.net> <h5r8a5$l41$1@smc.vnet.net>

Hi Diana, There are of course an infinite number of ways to approach this, and all sorts of embellishments and efficiencies that can be added. Here is one approach that I cooked up for your particular case (times tables). First define a function to do the work for one case: ClearAll[SaveEquation]; SaveEquation::dir = "The directory `1` does note exist. Please create it first."; SaveEquation[mValue_Integer, nValue_Integer, dir_String] := Catch@Module[{problemFile, solutionFile}, If[FileType[dir] =!= Directory, Throw[Message[SaveEquation::dir, dir]; $Failed]]; problemFile = ToFileName[dir, ToString[mValue] <> "Times" <> ToString[nValue] <> "Problem.jpg"]; solutionFile = ToFileName[dir, ToString[mValue] <> "Times" <> ToString[nValue] <> "Equals" <> ToString[mValue nValue] <> "Solution.jpg"]; Function[{m, n}, Export[problemFile, ExpressionCell[Defer[m \[Cross] n ], "Input", FontSize -> 30, Background -> LightGray], "JPG"]][mValue, nValue]; Function[{m, n}, Export[solutionFile, ExpressionCell[Defer[m \[Cross] n == #] &[m n], "Input", FontSize -> 30, Background -> LightGray]]][mValue, nValue] ] Now use this function on a list of integers as in SaveEquation[#, 14, "/Users/dreiss/Desktop/test/"] & /@ Range[14] where, of course the directory path "/Users/dreiss/Desktop/test/"] should be replaced with one that points to an existing directory on your hard disk. Best regards, David On Aug 12, 4:32 am, Diana <diana.me... at gmail.com> wrote: > David, > > Thank you for explaining how to do the export with ExpressionCell. > > I have a two part followup: > > 1) I want to do hundreds of these files, and would like to use a table > and variables which change. Is it possible to use "m" and "n" within > the ExpressionCell[Defer[1 + 91}, for example, so that I don't have to > rewrite each export statement? > > 2) I would like to make the file names dynamic. For example, if I am > adding 1 + 91 = 92, I would like to name the file 01019192.jpg, where > the leading 01 stands for addition, and the remaining string 019192 > stand for 1, 91, and the sum, respectively. > > As an example, I would like to be able to write one statement to > create 14 jpg files for the "14's" times tables, 1 x 14 = 14, 2 x 14 = = 28, ..., 14 x 14 = 196. > > Thank you for your time, > > Diana M. > > On Aug 11, 12:57 am, David Reiss <dbre... at gmail.com> wrote: > > > > > Here are two examples to get you started (of course the paths to the > > files need to be changed for your system).... > > > Export["/Users/dreiss/Desktop/MyEquation.jpg", > > ExpressionCell[Defer[1 + 91], "Input", FontSize -> 30, > > Background -> LightGray]] > > > Export["/Users/dreiss/Desktop/MyEquation.jpg", > > ExpressionCell[Defer[1 + 91 == #] &[1 + 91], "Input", FontSize -= > 30, > > Background -> LightGray]] > > > Hope this helps, > > > Davidhttp://www.scientificarts.com/worklife/ > > > On Aug 10, 4:15 am, Diana <diana.me... at gmail.com> wrote: > > > > Hi all, > > > > I want to quickly create many jpg image files of math facts though 24= , > > > such as > > > > 12 + 12 = 24 > > > 30 - 15 = 15 > > > 3 x 4 = 12 > > > > I would like to create the files with and without answers, with very > > > large font, and with an option to choose font and background colors. > > > > Can someone explain how to export equations, with special characters > > > for +, - * and /? > > > > Thank you, > > > > Diana