Symbolic radian coordinates in pgfplots

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I want to create a graph like the one shown in the figure (it is done with Geogebra), where on the x-axis there are labels in radians (for example $pi/6, pi/4, pi/2$ etc.) with its relative unit of measurement and on the y-axis values from $0$ to $+infty$.



enter image description here



In the meantime I have a difficulty to put the labels relative to the respective function maximums (in radians) where between $0$ and $pi/2$ there are (5) five maximus of the green function $f(x)=|sin(10x)|$. The violet function is $g(x)=10|cos(10x)|$ and between $0$ and $pi/2$ there are six (6) maximus.



Into my MWE there are some differences:



  1. I am not able to insert labels into radians (and for every maximum).

  2. I can't get the same graph as with Geogebra.

  3. I am not able to draw for the violet function for any point (for example A) its tangent to the graph to show that the slope is steeper than the green function.

Here my image with the MWE.
enter image description here



documentclassarticle
usepackagetikz,amsmath
usepackagepgfplots
begindocument
begintikzpicture
beginaxis[
 xmin=0,xmax=8*pi,
 xlabel=$x$,
 ymin=0,ymax=10,
 axis on top,
 legend style=legend cell align=right,legend plot pos=right]
addplot[color=red,domain=0:7*pi,samples=101] abs(sin(10*x));
addplot[color=green,domain=0:7*pi,samples=101] 10*abs(cos(10*x));
addlegendentrysin(10x)
addlegendentry$g(x)=10
endaxis
endtikzpicture
enddocument


I kindly ask for your valuable help and any improvement of my code is welcome. Thank you very much.




tikz-pgf labels




share|improve this question






















  • @marmot Done! I always listen to the best when they're right. :-)
    – Sebastiano
    Sep 5 at 9:59






  • 1




    Mille grazie!!!
    – marmot
    Sep 5 at 14:10






  • 2




    An off-topic suggestion: I noticed that you used the simple | as your absolute value delimiter. This creates wrong spacing when used together with sin or cos. Instead, use lvertsin(10x)rvert and observe the correct spacing between the opening | and the sin.
    – Ruixi Zhang
    Sep 7 at 0:59










  • @RuixiZhang Next time I'll try to change the code. Now I'm connected to a lucky location and I hope to remember to make the change. Thank you and always good work. You're very talented.
    – Sebastiano
    2 days ago














up vote
7
down vote

favorite












I want to create a graph like the one shown in the figure (it is done with Geogebra), where on the x-axis there are labels in radians (for example $pi/6, pi/4, pi/2$ etc.) with its relative unit of measurement and on the y-axis values from $0$ to $+infty$.



enter image description here



In the meantime I have a difficulty to put the labels relative to the respective function maximums (in radians) where between $0$ and $pi/2$ there are (5) five maximus of the green function $f(x)=|sin(10x)|$. The violet function is $g(x)=10|cos(10x)|$ and between $0$ and $pi/2$ there are six (6) maximus.



Into my MWE there are some differences:



  1. I am not able to insert labels into radians (and for every maximum).

  2. I can't get the same graph as with Geogebra.

  3. I am not able to draw for the violet function for any point (for example A) its tangent to the graph to show that the slope is steeper than the green function.

Here my image with the MWE.
enter image description here



documentclassarticle
usepackagetikz,amsmath
usepackagepgfplots
begindocument
begintikzpicture
beginaxis[
 xmin=0,xmax=8*pi,
 xlabel=$x$,
 ymin=0,ymax=10,
 axis on top,
 legend style=legend cell align=right,legend plot pos=right]
addplot[color=red,domain=0:7*pi,samples=101] abs(sin(10*x));
addplot[color=green,domain=0:7*pi,samples=101] 10*abs(cos(10*x));
addlegendentrysin(10x)
addlegendentry$g(x)=10
endaxis
endtikzpicture
enddocument


I kindly ask for your valuable help and any improvement of my code is welcome. Thank you very much.




tikz-pgf labels




share|improve this question






















  • @marmot Done! I always listen to the best when they're right. :-)
    – Sebastiano
    Sep 5 at 9:59






  • 1




    Mille grazie!!!
    – marmot
    Sep 5 at 14:10






  • 2




    An off-topic suggestion: I noticed that you used the simple | as your absolute value delimiter. This creates wrong spacing when used together with sin or cos. Instead, use lvertsin(10x)rvert and observe the correct spacing between the opening | and the sin.
    – Ruixi Zhang
    Sep 7 at 0:59










  • @RuixiZhang Next time I'll try to change the code. Now I'm connected to a lucky location and I hope to remember to make the change. Thank you and always good work. You're very talented.
    – Sebastiano
    2 days ago












up vote
7
down vote

favorite









up vote
7
down vote

favorite











I want to create a graph like the one shown in the figure (it is done with Geogebra), where on the x-axis there are labels in radians (for example $pi/6, pi/4, pi/2$ etc.) with its relative unit of measurement and on the y-axis values from $0$ to $+infty$.



enter image description here



In the meantime I have a difficulty to put the labels relative to the respective function maximums (in radians) where between $0$ and $pi/2$ there are (5) five maximus of the green function $f(x)=|sin(10x)|$. The violet function is $g(x)=10|cos(10x)|$ and between $0$ and $pi/2$ there are six (6) maximus.



Into my MWE there are some differences:



  1. I am not able to insert labels into radians (and for every maximum).

  2. I can't get the same graph as with Geogebra.

  3. I am not able to draw for the violet function for any point (for example A) its tangent to the graph to show that the slope is steeper than the green function.

Here my image with the MWE.
enter image description here



documentclassarticle
usepackagetikz,amsmath
usepackagepgfplots
begindocument
begintikzpicture
beginaxis[
 xmin=0,xmax=8*pi,
 xlabel=$x$,
 ymin=0,ymax=10,
 axis on top,
 legend style=legend cell align=right,legend plot pos=right]
addplot[color=red,domain=0:7*pi,samples=101] abs(sin(10*x));
addplot[color=green,domain=0:7*pi,samples=101] 10*abs(cos(10*x));
addlegendentrysin(10x)
addlegendentry$g(x)=10
endaxis
endtikzpicture
enddocument


I kindly ask for your valuable help and any improvement of my code is welcome. Thank you very much.




tikz-pgf labels




share|improve this question














I want to create a graph like the one shown in the figure (it is done with Geogebra), where on the x-axis there are labels in radians (for example $pi/6, pi/4, pi/2$ etc.) with its relative unit of measurement and on the y-axis values from $0$ to $+infty$.



enter image description here



In the meantime I have a difficulty to put the labels relative to the respective function maximums (in radians) where between $0$ and $pi/2$ there are (5) five maximus of the green function $f(x)=|sin(10x)|$. The violet function is $g(x)=10|cos(10x)|$ and between $0$ and $pi/2$ there are six (6) maximus.



Into my MWE there are some differences:



  1. I am not able to insert labels into radians (and for every maximum).

  2. I can't get the same graph as with Geogebra.

  3. I am not able to draw for the violet function for any point (for example A) its tangent to the graph to show that the slope is steeper than the green function.

Here my image with the MWE.
enter image description here



documentclassarticle
usepackagetikz,amsmath
usepackagepgfplots
begindocument
begintikzpicture
beginaxis[
 xmin=0,xmax=8*pi,
 xlabel=$x$,
 ymin=0,ymax=10,
 axis on top,
 legend style=legend cell align=right,legend plot pos=right]
addplot[color=red,domain=0:7*pi,samples=101] abs(sin(10*x));
addplot[color=green,domain=0:7*pi,samples=101] 10*abs(cos(10*x));
addlegendentrysin(10x)
addlegendentry$g(x)=10
endaxis
endtikzpicture
enddocument


I kindly ask for your valuable help and any improvement of my code is welcome. Thank you very much.





tikz-pgf labels





share|improve this question













share|improve this question




share|improve this question








edited Sep 5 at 9:49

























asked Sep 3 at 20:41









Sebastiano

7,68531553




7,68531553











  • @marmot Done! I always listen to the best when they're right. :-)
    – Sebastiano
    Sep 5 at 9:59






  • 1




    Mille grazie!!!
    – marmot
    Sep 5 at 14:10






  • 2




    An off-topic suggestion: I noticed that you used the simple | as your absolute value delimiter. This creates wrong spacing when used together with sin or cos. Instead, use lvertsin(10x)rvert and observe the correct spacing between the opening | and the sin.
    – Ruixi Zhang
    Sep 7 at 0:59










  • @RuixiZhang Next time I'll try to change the code. Now I'm connected to a lucky location and I hope to remember to make the change. Thank you and always good work. You're very talented.
    – Sebastiano
    2 days ago
















  • @marmot Done! I always listen to the best when they're right. :-)
    – Sebastiano
    Sep 5 at 9:59






  • 1




    Mille grazie!!!
    – marmot
    Sep 5 at 14:10






  • 2




    An off-topic suggestion: I noticed that you used the simple | as your absolute value delimiter. This creates wrong spacing when used together with sin or cos. Instead, use lvertsin(10x)rvert and observe the correct spacing between the opening | and the sin.
    – Ruixi Zhang
    Sep 7 at 0:59










  • @RuixiZhang Next time I'll try to change the code. Now I'm connected to a lucky location and I hope to remember to make the change. Thank you and always good work. You're very talented.
    – Sebastiano
    2 days ago















@marmot Done! I always listen to the best when they're right. :-)
– Sebastiano
Sep 5 at 9:59




@marmot Done! I always listen to the best when they're right. :-)
– Sebastiano
Sep 5 at 9:59




1




1




Mille grazie!!!
– marmot
Sep 5 at 14:10




Mille grazie!!!
– marmot
Sep 5 at 14:10




2




2




An off-topic suggestion: I noticed that you used the simple | as your absolute value delimiter. This creates wrong spacing when used together with sin or cos. Instead, use lvertsin(10x)rvert and observe the correct spacing between the opening | and the sin.
– Ruixi Zhang
Sep 7 at 0:59




An off-topic suggestion: I noticed that you used the simple | as your absolute value delimiter. This creates wrong spacing when used together with sin or cos. Instead, use lvertsin(10x)rvert and observe the correct spacing between the opening | and the sin.
– Ruixi Zhang
Sep 7 at 0:59












@RuixiZhang Next time I'll try to change the code. Now I'm connected to a lucky location and I hope to remember to make the change. Thank you and always good work. You're very talented.
– Sebastiano
2 days ago




@RuixiZhang Next time I'll try to change the code. Now I'm connected to a lucky location and I hope to remember to make the change. Thank you and always good work. You're very talented.
– Sebastiano
2 days ago










1 Answer
1






active

oldest

votes

















up vote
8
down vote



accepted










  1. You can use deg to convert to radians.

  2. Are you asking about the coloring or the background grid?

  3. For the third part I use (a slightly modified version of) Jake's great answer.

  4. In order to add symbolic x ticks, I use a combination of this answer by Peter Grill and that answer by Faekynn.

As for the question why the output of my previous answer did not resemble the GeoCobra result: I copied your question before the edit and did not realize that you added the factor of 10. I fixed that now. Note also that, if you plot 7 periods, it is advantageous to set the number of samples to 7*integer+1, which is why I use samples=99 instead of 101.



documentclassarticle
usepackagetikz,amsmath
usepackagepgfplots
usetikzlibraryintersections
usepackagefp % for frac
makeatletter % from https://tex.stackexchange.com/a/198046/121799
defparsenode[#1]#2pgf@nil%
 tikzsetlabel node/.style=#1
 defnodetext#2


tikzset
 add node at x/.style 2 args=
 name path global=plot line,
 /pgfplots/execute at end plot visualization/.append=-rel axis cs:0,0) --
 (axis cs:#1,0
 

makeatother
begindocument
% based on https://tex.stackexchange.com/a/34958/121799
foreach X [count=Y] in 0,...,7
pgfmathsetmacromyxX*pi/10
ifnumY=1
xdefLstXmyx
else
xdefLstXLstX,myx
fi

begintikzpicture
beginaxis[width=12cm,height=7cm,
 tangent/.style args=at pos #1 with length #2
 add node at x=#1
 [
 sloped, 
 append after command=(tikzlastnode.west) edge [thick, red!75!black] (tikzlastnode.east),
 minimum width=#2
 ]
 
 , 
 xtick=LstX,
 xticklabel=pgfmathsetmacrotmpround(10*tick/pi)
 pgfmathsetmacromygcdgcd(tmp,10)%
 pgfmathtruncatemacromynumeratortmp/mygcd%
 pgfmathtruncatemacromydenominator10/mygcd%
 ifnummynumerator=0
 $pgfmathprintnumber0$
 else
 ifnummynumerator=1
 $fracpipgfmathprintnumbermydenominator$
 else
 $fracmynumeratorpipgfmathprintnumbermydenominator$
 fi
 fi, % https://tex.stackexchange.com/a/304032/121799
 xmin=0,xmax=0.8*pi,
 xlabel=$x$,
 ymin=0,ymax=10,
 axis on top,
 legend style=legend cell align=right,legend plot pos=right]
% 
addplot[color=red,domain=0:0.7*pi,samples=99] abs(sin(10*deg(x)));
addplot[color=green!60!black,domain=0:0.7*pi,samples=99,
tangent=at pos 0.1 with length 5cm] 10*abs(cos(10*deg(x)));
addlegendentrysin(10x)
addlegendentry$g(x)=10
endaxis
endtikzpicture
enddocument


enter image description here






share|improve this answer






















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    active

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    8
    down vote



    accepted










    1. You can use deg to convert to radians.

    2. Are you asking about the coloring or the background grid?

    3. For the third part I use (a slightly modified version of) Jake's great answer.

    4. In order to add symbolic x ticks, I use a combination of this answer by Peter Grill and that answer by Faekynn.

    As for the question why the output of my previous answer did not resemble the GeoCobra result: I copied your question before the edit and did not realize that you added the factor of 10. I fixed that now. Note also that, if you plot 7 periods, it is advantageous to set the number of samples to 7*integer+1, which is why I use samples=99 instead of 101.



    documentclassarticle
    usepackagetikz,amsmath
    usepackagepgfplots
    usetikzlibraryintersections
    usepackagefp % for frac
    makeatletter % from https://tex.stackexchange.com/a/198046/121799
    defparsenode[#1]#2pgf@nil%
     tikzsetlabel node/.style=#1
     defnodetext#2


    tikzset
     add node at x/.style 2 args=
     name path global=plot line,
     /pgfplots/execute at end plot visualization/.append=-rel axis cs:0,0) --
     (axis cs:#1,0
     

    makeatother
    begindocument
    % based on https://tex.stackexchange.com/a/34958/121799
    foreach X [count=Y] in 0,...,7
    pgfmathsetmacromyxX*pi/10
    ifnumY=1
    xdefLstXmyx
    else
    xdefLstXLstX,myx
    fi

    begintikzpicture
    beginaxis[width=12cm,height=7cm,
     tangent/.style args=at pos #1 with length #2
     add node at x=#1
     [
     sloped, 
     append after command=(tikzlastnode.west) edge [thick, red!75!black] (tikzlastnode.east),
     minimum width=#2
     ]
     
     , 
     xtick=LstX,
     xticklabel=pgfmathsetmacrotmpround(10*tick/pi)
     pgfmathsetmacromygcdgcd(tmp,10)%
     pgfmathtruncatemacromynumeratortmp/mygcd%
     pgfmathtruncatemacromydenominator10/mygcd%
     ifnummynumerator=0
     $pgfmathprintnumber0$
     else
     ifnummynumerator=1
     $fracpipgfmathprintnumbermydenominator$
     else
     $fracmynumeratorpipgfmathprintnumbermydenominator$
     fi
     fi, % https://tex.stackexchange.com/a/304032/121799
     xmin=0,xmax=0.8*pi,
     xlabel=$x$,
     ymin=0,ymax=10,
     axis on top,
     legend style=legend cell align=right,legend plot pos=right]
    % 
    addplot[color=red,domain=0:0.7*pi,samples=99] abs(sin(10*deg(x)));
    addplot[color=green!60!black,domain=0:0.7*pi,samples=99,
    tangent=at pos 0.1 with length 5cm] 10*abs(cos(10*deg(x)));
    addlegendentrysin(10x)
    addlegendentry$g(x)=10
    endaxis
    endtikzpicture
    enddocument


    enter image description here






    share|improve this answer


























      up vote
      8
      down vote



      accepted










      1. You can use deg to convert to radians.

      2. Are you asking about the coloring or the background grid?

      3. For the third part I use (a slightly modified version of) Jake's great answer.

      4. In order to add symbolic x ticks, I use a combination of this answer by Peter Grill and that answer by Faekynn.

      As for the question why the output of my previous answer did not resemble the GeoCobra result: I copied your question before the edit and did not realize that you added the factor of 10. I fixed that now. Note also that, if you plot 7 periods, it is advantageous to set the number of samples to 7*integer+1, which is why I use samples=99 instead of 101.



      documentclassarticle
      usepackagetikz,amsmath
      usepackagepgfplots
      usetikzlibraryintersections
      usepackagefp % for frac
      makeatletter % from https://tex.stackexchange.com/a/198046/121799
      defparsenode[#1]#2pgf@nil%
       tikzsetlabel node/.style=#1
       defnodetext#2


      tikzset
       add node at x/.style 2 args=
       name path global=plot line,
       /pgfplots/execute at end plot visualization/.append=-rel axis cs:0,0) --
       (axis cs:#1,0
       

      makeatother
      begindocument
      % based on https://tex.stackexchange.com/a/34958/121799
      foreach X [count=Y] in 0,...,7
      pgfmathsetmacromyxX*pi/10
      ifnumY=1
      xdefLstXmyx
      else
      xdefLstXLstX,myx
      fi

      begintikzpicture
      beginaxis[width=12cm,height=7cm,
       tangent/.style args=at pos #1 with length #2
       add node at x=#1
       [
       sloped, 
       append after command=(tikzlastnode.west) edge [thick, red!75!black] (tikzlastnode.east),
       minimum width=#2
       ]
       
       , 
       xtick=LstX,
       xticklabel=pgfmathsetmacrotmpround(10*tick/pi)
       pgfmathsetmacromygcdgcd(tmp,10)%
       pgfmathtruncatemacromynumeratortmp/mygcd%
       pgfmathtruncatemacromydenominator10/mygcd%
       ifnummynumerator=0
       $pgfmathprintnumber0$
       else
       ifnummynumerator=1
       $fracpipgfmathprintnumbermydenominator$
       else
       $fracmynumeratorpipgfmathprintnumbermydenominator$
       fi
       fi, % https://tex.stackexchange.com/a/304032/121799
       xmin=0,xmax=0.8*pi,
       xlabel=$x$,
       ymin=0,ymax=10,
       axis on top,
       legend style=legend cell align=right,legend plot pos=right]
      % 
      addplot[color=red,domain=0:0.7*pi,samples=99] abs(sin(10*deg(x)));
      addplot[color=green!60!black,domain=0:0.7*pi,samples=99,
      tangent=at pos 0.1 with length 5cm] 10*abs(cos(10*deg(x)));
      addlegendentrysin(10x)
      addlegendentry$g(x)=10
      endaxis
      endtikzpicture
      enddocument


      enter image description here






      share|improve this answer
























        up vote
        8
        down vote



        accepted







        up vote
        8
        down vote



        accepted






        1. You can use deg to convert to radians.

        2. Are you asking about the coloring or the background grid?

        3. For the third part I use (a slightly modified version of) Jake's great answer.

        4. In order to add symbolic x ticks, I use a combination of this answer by Peter Grill and that answer by Faekynn.

        As for the question why the output of my previous answer did not resemble the GeoCobra result: I copied your question before the edit and did not realize that you added the factor of 10. I fixed that now. Note also that, if you plot 7 periods, it is advantageous to set the number of samples to 7*integer+1, which is why I use samples=99 instead of 101.



        documentclassarticle
        usepackagetikz,amsmath
        usepackagepgfplots
        usetikzlibraryintersections
        usepackagefp % for frac
        makeatletter % from https://tex.stackexchange.com/a/198046/121799
        defparsenode[#1]#2pgf@nil%
         tikzsetlabel node/.style=#1
         defnodetext#2


        tikzset
         add node at x/.style 2 args=
         name path global=plot line,
         /pgfplots/execute at end plot visualization/.append=-rel axis cs:0,0) --
         (axis cs:#1,0
         

        makeatother
        begindocument
        % based on https://tex.stackexchange.com/a/34958/121799
        foreach X [count=Y] in 0,...,7
        pgfmathsetmacromyxX*pi/10
        ifnumY=1
        xdefLstXmyx
        else
        xdefLstXLstX,myx
        fi

        begintikzpicture
        beginaxis[width=12cm,height=7cm,
         tangent/.style args=at pos #1 with length #2
         add node at x=#1
         [
         sloped, 
         append after command=(tikzlastnode.west) edge [thick, red!75!black] (tikzlastnode.east),
         minimum width=#2
         ]
         
         , 
         xtick=LstX,
         xticklabel=pgfmathsetmacrotmpround(10*tick/pi)
         pgfmathsetmacromygcdgcd(tmp,10)%
         pgfmathtruncatemacromynumeratortmp/mygcd%
         pgfmathtruncatemacromydenominator10/mygcd%
         ifnummynumerator=0
         $pgfmathprintnumber0$
         else
         ifnummynumerator=1
         $fracpipgfmathprintnumbermydenominator$
         else
         $fracmynumeratorpipgfmathprintnumbermydenominator$
         fi
         fi, % https://tex.stackexchange.com/a/304032/121799
         xmin=0,xmax=0.8*pi,
         xlabel=$x$,
         ymin=0,ymax=10,
         axis on top,
         legend style=legend cell align=right,legend plot pos=right]
        % 
        addplot[color=red,domain=0:0.7*pi,samples=99] abs(sin(10*deg(x)));
        addplot[color=green!60!black,domain=0:0.7*pi,samples=99,
        tangent=at pos 0.1 with length 5cm] 10*abs(cos(10*deg(x)));
        addlegendentrysin(10x)
        addlegendentry$g(x)=10
        endaxis
        endtikzpicture
        enddocument


        enter image description here






        share|improve this answer














        1. You can use deg to convert to radians.

        2. Are you asking about the coloring or the background grid?

        3. For the third part I use (a slightly modified version of) Jake's great answer.

        4. In order to add symbolic x ticks, I use a combination of this answer by Peter Grill and that answer by Faekynn.

        As for the question why the output of my previous answer did not resemble the GeoCobra result: I copied your question before the edit and did not realize that you added the factor of 10. I fixed that now. Note also that, if you plot 7 periods, it is advantageous to set the number of samples to 7*integer+1, which is why I use samples=99 instead of 101.



        documentclassarticle
        usepackagetikz,amsmath
        usepackagepgfplots
        usetikzlibraryintersections
        usepackagefp % for frac
        makeatletter % from https://tex.stackexchange.com/a/198046/121799
        defparsenode[#1]#2pgf@nil%
         tikzsetlabel node/.style=#1
         defnodetext#2


        tikzset
         add node at x/.style 2 args=
         name path global=plot line,
         /pgfplots/execute at end plot visualization/.append=-rel axis cs:0,0) --
         (axis cs:#1,0
         

        makeatother
        begindocument
        % based on https://tex.stackexchange.com/a/34958/121799
        foreach X [count=Y] in 0,...,7
        pgfmathsetmacromyxX*pi/10
        ifnumY=1
        xdefLstXmyx
        else
        xdefLstXLstX,myx
        fi

        begintikzpicture
        beginaxis[width=12cm,height=7cm,
         tangent/.style args=at pos #1 with length #2
         add node at x=#1
         [
         sloped, 
         append after command=(tikzlastnode.west) edge [thick, red!75!black] (tikzlastnode.east),
         minimum width=#2
         ]
         
         , 
         xtick=LstX,
         xticklabel=pgfmathsetmacrotmpround(10*tick/pi)
         pgfmathsetmacromygcdgcd(tmp,10)%
         pgfmathtruncatemacromynumeratortmp/mygcd%
         pgfmathtruncatemacromydenominator10/mygcd%
         ifnummynumerator=0
         $pgfmathprintnumber0$
         else
         ifnummynumerator=1
         $fracpipgfmathprintnumbermydenominator$
         else
         $fracmynumeratorpipgfmathprintnumbermydenominator$
         fi
         fi, % https://tex.stackexchange.com/a/304032/121799
         xmin=0,xmax=0.8*pi,
         xlabel=$x$,
         ymin=0,ymax=10,
         axis on top,
         legend style=legend cell align=right,legend plot pos=right]
        % 
        addplot[color=red,domain=0:0.7*pi,samples=99] abs(sin(10*deg(x)));
        addplot[color=green!60!black,domain=0:0.7*pi,samples=99,
        tangent=at pos 0.1 with length 5cm] 10*abs(cos(10*deg(x)));
        addlegendentrysin(10x)
        addlegendentry$g(x)=10
        endaxis
        endtikzpicture
        enddocument


        enter image description here







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        edited Sep 3 at 22:09

























        answered Sep 3 at 20:48









        marmot

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