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Add the direction of a curve with tikz


Drawing a curve with TikZTikZ: Thick curve segment in a curveThe perplexing path direction of TikZAdd legend to the curve from drawHow to prevent rounded and duplicated tick labels in pgfplots with fixed precision?Curve with TikzTikZ: Smooth curve through three points without changing directionTikz: Lebesgue curve / Z curveTikZ: Z-order curve (Lebesgue curve) with Lindenmayer systemstikz arrow direction













1















The code:



begintikzpicture[scale=0.7]
beginaxis[xlabel=$s$,ylabel=$c$,legend pos=south east]
addlegendimageempty legend
addlegendentry
addplot+[blue, samples=40, variable=zeta, domain=10:25]
((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 +
2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2
+ 2*0.2*1/(0.05*zeta)*(-0.1)));
addlegendentry$P^ast$
addplot+[red, samples=40, variable=zeta, domain=10:25]
((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 +
2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2
+ 2*0.2*1/(0.05*zeta)*(-0.1)));
addlegendentry$P^dagger$
endaxis
endtikzpicture


produces the following image:



enter image description here



However, I would like to add the "direction" of the curves, i.e. the direction in which they increase. E.g., in the picture this direction is inside-out. What's a way to obtain it?










share|improve this question


























    1















    The code:



    begintikzpicture[scale=0.7]
    beginaxis[xlabel=$s$,ylabel=$c$,legend pos=south east]
    addlegendimageempty legend
    addlegendentry
    addplot+[blue, samples=40, variable=zeta, domain=10:25]
    ((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
    1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 +
    2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2
    + 2*0.2*1/(0.05*zeta)*(-0.1)));
    addlegendentry$P^ast$
    addplot+[red, samples=40, variable=zeta, domain=10:25]
    ((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
    1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 +
    2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2
    + 2*0.2*1/(0.05*zeta)*(-0.1)));
    addlegendentry$P^dagger$
    endaxis
    endtikzpicture


    produces the following image:



    enter image description here



    However, I would like to add the "direction" of the curves, i.e. the direction in which they increase. E.g., in the picture this direction is inside-out. What's a way to obtain it?










    share|improve this question
























      1












      1








      1








      The code:



      begintikzpicture[scale=0.7]
      beginaxis[xlabel=$s$,ylabel=$c$,legend pos=south east]
      addlegendimageempty legend
      addlegendentry
      addplot+[blue, samples=40, variable=zeta, domain=10:25]
      ((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
      1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 +
      2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2
      + 2*0.2*1/(0.05*zeta)*(-0.1)));
      addlegendentry$P^ast$
      addplot+[red, samples=40, variable=zeta, domain=10:25]
      ((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
      1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 +
      2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2
      + 2*0.2*1/(0.05*zeta)*(-0.1)));
      addlegendentry$P^dagger$
      endaxis
      endtikzpicture


      produces the following image:



      enter image description here



      However, I would like to add the "direction" of the curves, i.e. the direction in which they increase. E.g., in the picture this direction is inside-out. What's a way to obtain it?










      share|improve this question














      The code:



      begintikzpicture[scale=0.7]
      beginaxis[xlabel=$s$,ylabel=$c$,legend pos=south east]
      addlegendimageempty legend
      addlegendentry
      addplot+[blue, samples=40, variable=zeta, domain=10:25]
      ((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
      1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 +
      2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2
      + 2*0.2*1/(0.05*zeta)*(-0.1)));
      addlegendentry$P^ast$
      addplot+[red, samples=40, variable=zeta, domain=10:25]
      ((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
      1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 +
      2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2
      + 2*0.2*1/(0.05*zeta)*(-0.1)));
      addlegendentry$P^dagger$
      endaxis
      endtikzpicture


      produces the following image:



      enter image description here



      However, I would like to add the "direction" of the curves, i.e. the direction in which they increase. E.g., in the picture this direction is inside-out. What's a way to obtain it?







      tikz-pgf






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 12 mins ago









      MarkMark

      23516




      23516




















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          documentclass[border=3.14mm,tikz]standalone
          usepackagepgfplots
          pgfplotssetcompat=1.16
          usetikzlibraryshapes.arrows
          begindocument
          begintikzpicture[scale=0.7]
          beginaxis[xlabel=$s$,ylabel=$c$,legend pos=south east,
          enlargelimits=0.2]
          addlegendimageempty legend
          addlegendentry
          addplot+[blue, samples=40, variable=zeta, domain=10:25]
          ((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
          1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 +
          2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2
          + 2*0.2*1/(0.05*zeta)*(-0.1)))
          node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily]
          increasing;
          addlegendentry$P^ast$
          addplot+[red, samples=40, variable=zeta, domain=10:25]
          ((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
          1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 +
          2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2
          + 2*0.2*1/(0.05*zeta)*(-0.1)))
          node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily,
          shape border rotate=180]
          increasing;
          addlegendentry$P^dagger$
          endaxis
          endtikzpicture
          enddocument


          enter image description here





          share























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            1 Answer
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            active

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            active

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            0














            Like this?



            documentclass[border=3.14mm,tikz]standalone
            usepackagepgfplots
            pgfplotssetcompat=1.16
            usetikzlibraryshapes.arrows
            begindocument
            begintikzpicture[scale=0.7]
            beginaxis[xlabel=$s$,ylabel=$c$,legend pos=south east,
            enlargelimits=0.2]
            addlegendimageempty legend
            addlegendentry
            addplot+[blue, samples=40, variable=zeta, domain=10:25]
            ((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
            1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 +
            2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2
            + 2*0.2*1/(0.05*zeta)*(-0.1)))
            node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily]
            increasing;
            addlegendentry$P^ast$
            addplot+[red, samples=40, variable=zeta, domain=10:25]
            ((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
            1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 +
            2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2
            + 2*0.2*1/(0.05*zeta)*(-0.1)))
            node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily,
            shape border rotate=180]
            increasing;
            addlegendentry$P^dagger$
            endaxis
            endtikzpicture
            enddocument


            enter image description here





            share



























              0














              Like this?



              documentclass[border=3.14mm,tikz]standalone
              usepackagepgfplots
              pgfplotssetcompat=1.16
              usetikzlibraryshapes.arrows
              begindocument
              begintikzpicture[scale=0.7]
              beginaxis[xlabel=$s$,ylabel=$c$,legend pos=south east,
              enlargelimits=0.2]
              addlegendimageempty legend
              addlegendentry
              addplot+[blue, samples=40, variable=zeta, domain=10:25]
              ((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
              1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 +
              2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2
              + 2*0.2*1/(0.05*zeta)*(-0.1)))
              node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily]
              increasing;
              addlegendentry$P^ast$
              addplot+[red, samples=40, variable=zeta, domain=10:25]
              ((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
              1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 +
              2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2
              + 2*0.2*1/(0.05*zeta)*(-0.1)))
              node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily,
              shape border rotate=180]
              increasing;
              addlegendentry$P^dagger$
              endaxis
              endtikzpicture
              enddocument


              enter image description here





              share

























                0












                0








                0







                Like this?



                documentclass[border=3.14mm,tikz]standalone
                usepackagepgfplots
                pgfplotssetcompat=1.16
                usetikzlibraryshapes.arrows
                begindocument
                begintikzpicture[scale=0.7]
                beginaxis[xlabel=$s$,ylabel=$c$,legend pos=south east,
                enlargelimits=0.2]
                addlegendimageempty legend
                addlegendentry
                addplot+[blue, samples=40, variable=zeta, domain=10:25]
                ((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
                1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 +
                2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2
                + 2*0.2*1/(0.05*zeta)*(-0.1)))
                node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily]
                increasing;
                addlegendentry$P^ast$
                addplot+[red, samples=40, variable=zeta, domain=10:25]
                ((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
                1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 +
                2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2
                + 2*0.2*1/(0.05*zeta)*(-0.1)))
                node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily,
                shape border rotate=180]
                increasing;
                addlegendentry$P^dagger$
                endaxis
                endtikzpicture
                enddocument


                enter image description here





                share













                Like this?



                documentclass[border=3.14mm,tikz]standalone
                usepackagepgfplots
                pgfplotssetcompat=1.16
                usetikzlibraryshapes.arrows
                begindocument
                begintikzpicture[scale=0.7]
                beginaxis[xlabel=$s$,ylabel=$c$,legend pos=south east,
                enlargelimits=0.2]
                addlegendimageempty legend
                addlegendentry
                addplot+[blue, samples=40, variable=zeta, domain=10:25]
                ((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
                1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2 +
                2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 + 1/2*sqrt((0.1 - 0.4)^2
                + 2*0.2*1/(0.05*zeta)*(-0.1)))
                node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily]
                increasing;
                addlegendentry$P^ast$
                addplot+[red, samples=40, variable=zeta, domain=10:25]
                ((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 + 2*0.2*1/(0.05*zeta)*(-0.1)),
                1/(2*zeta)*(-0.1)/((0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2 +
                2*0.2*1/(0.05*zeta)*(-0.1)) - 0.1) + (0.1 + 0.4)/2 - 1/2*sqrt((0.1 - 0.4)^2
                + 2*0.2*1/(0.05*zeta)*(-0.1)))
                node[midway,above=2ex,sloped,single arrow,fill,text=white,font=sffamily,
                shape border rotate=180]
                increasing;
                addlegendentry$P^dagger$
                endaxis
                endtikzpicture
                enddocument


                enter image description here






                share











                share


                share










                answered 5 mins ago









                marmotmarmot

                114k5145276




                114k5145276



























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