What command should I use to be warned of this collision beforehand?











up vote
0
down vote

favorite












After a hunt through several subfiles, I've narrowed down what I thought was a bug down to this MWE



documentclass{article}

usepackage{amsmath, amssymb}

newcommand{R}{mathbb{R}}

begin{document}

$R$

newdimenR

R=.4cm

$R$

end{document}


Clearly user error. Although this is what I get for copy and pasting code without paying too close attention to the variables they use. What commands should I use to be warned of this collision in compiling instead of getting the error ! Missing number... and having to scour several files for what this could be?



I feel like this is along the lines of def versus newcommand.






tex-core






share


























    up vote
    0
    down vote

    favorite












    After a hunt through several subfiles, I've narrowed down what I thought was a bug down to this MWE



    documentclass{article}
    
usepackage{amsmath, amssymb}
    
newcommand{R}{mathbb{R}}
    
begin{document}
    
$R$
    
newdimenR
    
R=.4cm
    
$R$
    
end{document}


    Clearly user error. Although this is what I get for copy and pasting code without paying too close attention to the variables they use. What commands should I use to be warned of this collision in compiling instead of getting the error ! Missing number... and having to scour several files for what this could be?



    I feel like this is along the lines of def versus newcommand.






    tex-core






    share
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      After a hunt through several subfiles, I've narrowed down what I thought was a bug down to this MWE



      documentclass{article}
      
usepackage{amsmath, amssymb}
      
newcommand{R}{mathbb{R}}
      
begin{document}
      
$R$
      
newdimenR
      
R=.4cm
      
$R$
      
end{document}


      Clearly user error. Although this is what I get for copy and pasting code without paying too close attention to the variables they use. What commands should I use to be warned of this collision in compiling instead of getting the error ! Missing number... and having to scour several files for what this could be?



      I feel like this is along the lines of def versus newcommand.






      tex-core






      share













      After a hunt through several subfiles, I've narrowed down what I thought was a bug down to this MWE



      documentclass{article}
      
usepackage{amsmath, amssymb}
      
newcommand{R}{mathbb{R}}
      
begin{document}
      
$R$
      
newdimenR
      
R=.4cm
      
$R$
      
end{document}


      Clearly user error. Although this is what I get for copy and pasting code without paying too close attention to the variables they use. What commands should I use to be warned of this collision in compiling instead of getting the error ! Missing number... and having to scour several files for what this could be?



      I feel like this is along the lines of def versus newcommand.






      tex-core




      tex-core





      share












      share










      share



      share










      asked 4 mins ago









      Robert Wolfe

      1009




      1009



























          active

          oldest

          votes











          Your Answer








          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "85"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: false,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2ftex.stackexchange.com%2fquestions%2f466483%2fwhat-command-should-i-use-to-be-warned-of-this-collision-beforehand%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown






























          active

          oldest

          votes













          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















          draft saved

          draft discarded




















































          Thanks for contributing an answer to TeX - LaTeX Stack Exchange!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid …



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.





          Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


          Please pay close attention to the following guidance:


          • Please be sure to answer the question. Provide details and share your research!

          But avoid …



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2ftex.stackexchange.com%2fquestions%2f466483%2fwhat-command-should-i-use-to-be-warned-of-this-collision-beforehand%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          -

          Popular posts from this blog

          A CLEAN and SIMPLE way to add appendices to Table of Contents and bookmarks

          Image
          0 I found a lot of questions abount appendices and ToC. Many users want appendices to be grouped in an Appendix part, however some problems arise with ToC, hyperref, PDF viewer bookmarks, and so on. There are different solutions which require extra packages, command patching and other extra code, however none of them satisfies me. I almost found an easy way to accomplish a good result, where appendices are added to bookmarks in the right way and hyperref links point to the right page. However, the number of the "Appendix" part page is wrong (it's the number of appendix A). Is there any EASY way to fix that? This is a MWE: documentclass{book} usepackage[nottoc,notlot,notlof]{tocbibind} usepackage{hyperref} begin{document} frontmatter tableofcontents mainmatter part{First} chapter{...
          Read more

          Calculate evaluation metrics using cross_val_predict sklearn

          Image
          1 In the sklearn.model_selection.cross_val_predict page it is stated: Generate cross-validated estimates for each input data point. It is not appropriate to pass these predictions into an evaluation metric. Can someone explain what does it mean? If this gives estimate of Y (y prediction) for every Y (true Y), why can't I calculate metrics such as RMSE or coefficient of determination using these results? python scikit-learn cross-validation share | improve this question edited Nov 28 '18 at 17:52 desertnaut 20.3k 7 43 79 ...
          Read more

          Insert data from modal to MySQL (multiple modal on website)

          Image
          0 I have problem with inserting data to MySQL from modal. My modal: <a href="#" class="badge badge-pill badge-success">6 komentarzy</a> <a href="#" class="badge badge-pill badge-danger">brak komentarzy</a> <a data-toggle="modal" href="#add_desk_comm_{$desk_['desk_id']}" data-target="#add_desk_comm_{$desk_['desk_id']}" class="ediiit">(dodaj)</a> <div class="modal fade" id="add_desk_comm_{$desk_['desk_id']}" tabindex="-1" role="dialog" aria-labelledby="edit_printer" aria-hidden="true"> <div class="modal-dialog" role="document"> ...
          Read more