Safe alternatives to ToExpression
BackgroundConversion from string/boxes to expression is quite common. Very often the goal would be a simple switch from "1" to 1. Or "foo" to fooMindless ToExpression can lead to evaluation caused by...
View ArticleHow to import a Microsoft Word document into Mathematica?
I have a Microsoft Word document in DOCX format. I need to import it into Mathematica as a String preserving all formatting (font, size, bold/italic style, colors, etc), tables and embedded images with...
View ArticleElement combinations
I have a list:lis = {"ab", "cde", 2,"rs",3,"tu","v","w",7}and would like to get the following list:lis2 = {abcde, 2,rs, 3,tuvw,7}... with adjacent strings joined and separated by integers. Any thoughts...
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Sorting logic and generation of letter sequence
In the context of experimental designs, it is common to generate the various treatment names to build the factorial design table.The table of the 2^2 design reads :For the 2^3, the table reads :And for...
View ArticleGetting the value of sentences
I have a list, importance, that assigns a "value" to each word in some text, like such:{ {the, 0.9}, {and, 1}, {red, 2.1} }And I also have a list of sentences, with no periods. What I am trying to do...
View ArticleHow to convert the string "A^0" into the expression Superscript[A,0]?
I'm looking for a procedural way to define a symbol for a variable, based on a string. For instance, ToExpression["A^B"] gives us Power[A,B] (which, might be enough if we know that B will never get any...
View ArticleBehaviour of `ToExpression` inside a function definition
I want to create a function that takes in an array of unknown size and do some index operations on it. I am using strings to construct the expression and then trying to use ToExpression for evaluating...
View ArticleHow to select elements from a list of strings?
info = {"so96", "se35"};toplanti = {{"ag03", "sr93"}, {"ag03", "ma16"}, {"ma21", "mi06"}, {"ma21", "ma27"}, {"ma21", "so96"}, {"ma21", "si63"}, {"ma30", "mi06"}, {"ma30", "se39"}, {"ma30", "ma26"},...
View ArticleConditional string replacement
I have a list of text and need to replace an element based on the text that appears in the element before it. Example of my...
View ArticleWhy is SequencePosition or SequenceCases so slow on large lists?
I observed that SequencePosition or Sequence Cases on a list of around 60'000 digits is so slow that I had to sort out to string pattern matching.Is this normal behavior or should Wolfram have a look...
View ArticleHow to remove adjacent date strings in a list?
Given a list aslist = {"2018-9-1",1,2,3,"2018-9-2","2018-9-3",4,5,6,"2018-9-5",7,8,9,"2018-9-6","2018-9-7",10,11,12,"2018-9-8",13,14,15,"2018-9-9",16,17,18}orlist =...
View ArticleDeleting certain integers from string list
I have a list of strings:lis = {"a","1","b","2","c","3","a","d","4"}and would like to get:res = {"a","b","2","c","3","a","d","4"}where each occurrence of "a" that is immediately followed by (a string...
View ArticleManipulation of two lists of strings and integers
I have the following lists: l1 = {{"letter.a.a", "1"}, {"letter.b.b", "1"}, {"letter.c.c", "1"}, {"letter.d.d", "1"}, {"letter.e.e", "1"}, {"letter.f.f", "1"}};l2 = {{"f", 10}, {"c", 9}, {"e", 8},...
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The problem of matching consecutive cross-line strings
I have a file named "s0.log",There's a lot of this structure in there:You can see that the strings "Alpha occ.eigenvalues --" and "Alpha virt.eigenvalues --" will be contiguous.There are many similar...
View ArticleRemoving all sublists containing any arbitrary string as one or more of its...
so, basically I have a list of sublists of varying length. For example,list={{#,a,b,c,d},{#,e,f,g},{#,h,1},{#,2},{#},{#,k,l,m,n,o},{#,a,b,1,2},{1,2},{2,3},{3,4},{4,5}}And I would like to end up...
View ArticleHow to replace numbers by letters in a special way?
There are few sublists:lists = {{0,0,0}, {0,0,1}, {0,1,0}, {0,1,1}, {1,0,0}, {1,0,1}, {1,1,0}, {1,1,1}}The goal is to put A if the first element of a sublist is 1, B if the second element of a sublist...
View ArticleHow to use `StringJoin` in the given example?
Is there a way to use StringJoin to go from: {{abc, 0000}, {def, 1111}} To{{abc_0000},{def_1111}}I've been trying to use Map and MapThread with StringJoin but have failed.
View ArticleJoining adjacent elements by rule
I have a list of strings:lis = {"a","1","c","ef","g","2"}and would like to join all adjacent non-numeric characters to produce:res = {"a","1","cefg","2"}Thanks for advice...
View ArticleManipulation of string list
I have a list:lis = {{"a", "b", "X", "0"}, {"a", "f", "z", "1"}, {"g", "a", "z", "1"}, {"a", "b", "x", "0"}};The last field of each element of lis is either "0" or "1".I need to convert the third field...
View ArticleWriting Mathematica code for putting in commutation relations in a string
I am trying to write a mathematica code to accomplish the following:For a given $n$, consider $(ab)^n$, which is a string of the form $\underbrace{ababab...ab}_{n\text{ times}}$.I want to replace $ba$...
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