How to use ReplaceAll on an expression that contains a rule












1












$begingroup$


I know I have seen this before but can't seem to locate it today.



I am trying to take an expression that has some rules in it and replace one of that parts that contain a rule using ReplaceAll



For a simple example consider:



testExpression = {"stuff", Axes -> {False, True}}

(* {"stuff", Axes -> {False, True}} *)


and I want to replace the



Axes -> {False, True}


with



Axes -> False


I have tried



testExpression /. 

 Hold[Axes -> {False, True}] -> Hold[Axes -> False]

(* {"stuff", Axes -> {False, True}} *)


as well as



testExpression /. 

 Hold[Rule[Axes , {False, True}]] -> Hold[Rule[Axes , False]]

(* {"stuff", Axes -> {False, True}} *)


I promise to add this to my set of notes if someone could kindly enlighten me.






replacement







share|improve this question









$endgroup$

















    1












    $begingroup$


    I know I have seen this before but can't seem to locate it today.



    I am trying to take an expression that has some rules in it and replace one of that parts that contain a rule using ReplaceAll



    For a simple example consider:



    testExpression = {"stuff", Axes -> {False, True}}
    
(* {"stuff", Axes -> {False, True}} *)


    and I want to replace the



    Axes -> {False, True}


    with



    Axes -> False


    I have tried



    testExpression /. 
    
 Hold[Axes -> {False, True}] -> Hold[Axes -> False]
    
(* {"stuff", Axes -> {False, True}} *)


    as well as



    testExpression /. 
    
 Hold[Rule[Axes , {False, True}]] -> Hold[Rule[Axes , False]]
    
(* {"stuff", Axes -> {False, True}} *)


    I promise to add this to my set of notes if someone could kindly enlighten me.






    replacement







    share|improve this question









    $endgroup$















      1












      1








      1





      $begingroup$


      I know I have seen this before but can't seem to locate it today.



      I am trying to take an expression that has some rules in it and replace one of that parts that contain a rule using ReplaceAll



      For a simple example consider:



      testExpression = {"stuff", Axes -> {False, True}}
      
(* {"stuff", Axes -> {False, True}} *)


      and I want to replace the



      Axes -> {False, True}


      with



      Axes -> False


      I have tried



      testExpression /. 
      
 Hold[Axes -> {False, True}] -> Hold[Axes -> False]
      
(* {"stuff", Axes -> {False, True}} *)


      as well as



      testExpression /. 
      
 Hold[Rule[Axes , {False, True}]] -> Hold[Rule[Axes , False]]
      
(* {"stuff", Axes -> {False, True}} *)


      I promise to add this to my set of notes if someone could kindly enlighten me.






      replacement







      share|improve this question









      $endgroup$




      I know I have seen this before but can't seem to locate it today.



      I am trying to take an expression that has some rules in it and replace one of that parts that contain a rule using ReplaceAll



      For a simple example consider:



      testExpression = {"stuff", Axes -> {False, True}}
      
(* {"stuff", Axes -> {False, True}} *)


      and I want to replace the



      Axes -> {False, True}


      with



      Axes -> False


      I have tried



      testExpression /. 
      
 Hold[Axes -> {False, True}] -> Hold[Axes -> False]
      
(* {"stuff", Axes -> {False, True}} *)


      as well as



      testExpression /. 
      
 Hold[Rule[Axes , {False, True}]] -> Hold[Rule[Axes , False]]
      
(* {"stuff", Axes -> {False, True}} *)


      I promise to add this to my set of notes if someone could kindly enlighten me.






      replacement




      replacement






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 26 mins ago









      Jack LaVigneJack LaVigne

      11.9k21632




      11.9k21632






















          1 Answer
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          $begingroup$

          Here are a couple possibilities:



          testExpression /. Rule[Axes, {False, True}] -> Axes -> False
          
testExpression /. HoldPattern[Axes -> {False, True}] -> Axes -> False



          {"stuff", Axes -> False}



          {"stuff", Axes -> False}







          share|improve this answer









          $endgroup$














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            1 Answer
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            active

            oldest

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            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            2












            $begingroup$

            Here are a couple possibilities:



            testExpression /. Rule[Axes, {False, True}] -> Axes -> False
            
testExpression /. HoldPattern[Axes -> {False, True}] -> Axes -> False



            {"stuff", Axes -> False}



            {"stuff", Axes -> False}







            share|improve this answer









            $endgroup$


















              2












              $begingroup$

              Here are a couple possibilities:



              testExpression /. Rule[Axes, {False, True}] -> Axes -> False
              
testExpression /. HoldPattern[Axes -> {False, True}] -> Axes -> False



              {"stuff", Axes -> False}



              {"stuff", Axes -> False}







              share|improve this answer









              $endgroup$
















                2












                2








                2





                $begingroup$

                Here are a couple possibilities:



                testExpression /. Rule[Axes, {False, True}] -> Axes -> False
                
testExpression /. HoldPattern[Axes -> {False, True}] -> Axes -> False



                {"stuff", Axes -> False}



                {"stuff", Axes -> False}







                share|improve this answer









                $endgroup$



                Here are a couple possibilities:



                testExpression /. Rule[Axes, {False, True}] -> Axes -> False
                
testExpression /. HoldPattern[Axes -> {False, True}] -> Axes -> False



                {"stuff", Axes -> False}



                {"stuff", Axes -> False}








                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 20 mins ago









                Carl WollCarl Woll

                72.1k395186




                72.1k395186






























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