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Weird diagonal under legends with Tikzpicture

node command while defining a coordinate in TikZplotting two time series with boundsGrouped bar chartHow do i get the x axis on top but keep a line on the bottomPolar Plots - layout and extraction of crucial parametersAdding legends to tikzpictureHow to prevent rounded and duplicated tick labels in pgfplots with fixed precision?How to hide empty (value 0) ybars with pgfplots?Show mark labels near marks and not centered in ybar interaval graphpgfplots: percentage in matrix plotCenter the axes in the coordinate origin

0

My code for tikzpicture:

begin{tikzpicture} [domain=0:4]

begin{axis}[     axis lines = left,     xlabel = $lambda$,     ylabel = {$x$}, ] 

addplot [ fill=red, opacity=.4,    domain=1:6,      samples=100,      color=red, thick, mark=none ] {sqrt((0.1*x^(8)+x^(6)+0.3*x^(2)+3)/(x^(8)))} -- (axis cs:0,40) closedcycle; 

addlegendentry{$D(lambda)$} 

addplot [  fill=blue, opacity=.4,   domain=1:6,      samples=100,      color=blue, thick, mark=none    ]     {sqrt((0.1*x^(8)+x^(6)/3+0.1*x^(2)+5/3)/(x^(8)))} -- (axis cs:0,40) closedcycle; 

addlegendentry{$f(lambda)$}



addplot [ domain=1:6, fill=yellow!25,    opacity=.4, samples=100,      color=green, thick, mark=none  ]     {sqrt((0.1*x^(8)-x^(6)-0.3*x^(2)-1)/(x^(8)))} closedcycle; 



addlegendentry{$g(lambda)$}  

end{axis} 

end{tikzpicture}

is giving a weird diagonal at right:

Why is it happening? How could I obtain a straight line under the legends?

pgfplots

share|improve this question

edited 19 hours ago

JouleV

11.7k22561

asked 19 hours ago

gibariangibarian

32

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  (1) welcome, (2) in order for us to help you please expand your sniplet to a full (but minimal) example, that we can copy and use as is in order for get the image you posted.
  
  – daleif
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Besides how is this question related to LyX?
  
  – daleif
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I am compiling with Lyx. I mentioned just for help.
  
  – gibarian
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The effect comes from -- (axis cs:0,40), which is very high up but not above the end point of the plot.
  
  – marmot
  19 hours ago
  

  
  
  
  

add a comment | 

0

My code for tikzpicture:

begin{tikzpicture} [domain=0:4]

begin{axis}[     axis lines = left,     xlabel = $lambda$,     ylabel = {$x$}, ] 

addplot [ fill=red, opacity=.4,    domain=1:6,      samples=100,      color=red, thick, mark=none ] {sqrt((0.1*x^(8)+x^(6)+0.3*x^(2)+3)/(x^(8)))} -- (axis cs:0,40) closedcycle; 

addlegendentry{$D(lambda)$} 

addplot [  fill=blue, opacity=.4,   domain=1:6,      samples=100,      color=blue, thick, mark=none    ]     {sqrt((0.1*x^(8)+x^(6)/3+0.1*x^(2)+5/3)/(x^(8)))} -- (axis cs:0,40) closedcycle; 

addlegendentry{$f(lambda)$}



addplot [ domain=1:6, fill=yellow!25,    opacity=.4, samples=100,      color=green, thick, mark=none  ]     {sqrt((0.1*x^(8)-x^(6)-0.3*x^(2)-1)/(x^(8)))} closedcycle; 



addlegendentry{$g(lambda)$}  

end{axis} 

end{tikzpicture}

is giving a weird diagonal at right:

Why is it happening? How could I obtain a straight line under the legends?

pgfplots

share|improve this question

edited 19 hours ago

JouleV

11.7k22561

asked 19 hours ago

gibariangibarian

32

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  (1) welcome, (2) in order for us to help you please expand your sniplet to a full (but minimal) example, that we can copy and use as is in order for get the image you posted.
  
  – daleif
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Besides how is this question related to LyX?
  
  – daleif
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I am compiling with Lyx. I mentioned just for help.
  
  – gibarian
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  The effect comes from -- (axis cs:0,40), which is very high up but not above the end point of the plot.
  
  – marmot
  19 hours ago
  

  
  
  
  

add a comment | 

My code for tikzpicture:

begin{tikzpicture} [domain=0:4]

begin{axis}[     axis lines = left,     xlabel = $lambda$,     ylabel = {$x$}, ] 

addplot [ fill=red, opacity=.4,    domain=1:6,      samples=100,      color=red, thick, mark=none ] {sqrt((0.1*x^(8)+x^(6)+0.3*x^(2)+3)/(x^(8)))} -- (axis cs:0,40) closedcycle; 

addlegendentry{$D(lambda)$} 

addplot [  fill=blue, opacity=.4,   domain=1:6,      samples=100,      color=blue, thick, mark=none    ]     {sqrt((0.1*x^(8)+x^(6)/3+0.1*x^(2)+5/3)/(x^(8)))} -- (axis cs:0,40) closedcycle; 

addlegendentry{$f(lambda)$}



addplot [ domain=1:6, fill=yellow!25,    opacity=.4, samples=100,      color=green, thick, mark=none  ]     {sqrt((0.1*x^(8)-x^(6)-0.3*x^(2)-1)/(x^(8)))} closedcycle; 



addlegendentry{$g(lambda)$}  

end{axis} 

end{tikzpicture}

is giving a weird diagonal at right:

Why is it happening? How could I obtain a straight line under the legends?

pgfplots

share|improve this question

edited 19 hours ago

JouleV

11.7k22561

asked 19 hours ago

gibariangibarian

32

begin{tikzpicture} [domain=0:4]

begin{axis}[     axis lines = left,     xlabel = $lambda$,     ylabel = {$x$}, ] 

addplot [ fill=red, opacity=.4,    domain=1:6,      samples=100,      color=red, thick, mark=none ] {sqrt((0.1*x^(8)+x^(6)+0.3*x^(2)+3)/(x^(8)))} -- (axis cs:0,40) closedcycle; 

addlegendentry{$D(lambda)$} 

addplot [  fill=blue, opacity=.4,   domain=1:6,      samples=100,      color=blue, thick, mark=none    ]     {sqrt((0.1*x^(8)+x^(6)/3+0.1*x^(2)+5/3)/(x^(8)))} -- (axis cs:0,40) closedcycle; 

addlegendentry{$f(lambda)$}



addplot [ domain=1:6, fill=yellow!25,    opacity=.4, samples=100,      color=green, thick, mark=none  ]     {sqrt((0.1*x^(8)-x^(6)-0.3*x^(2)-1)/(x^(8)))} closedcycle; 



addlegendentry{$g(lambda)$}  

end{axis} 

end{tikzpicture}

share|improve this question

edited 19 hours ago

JouleV

11.7k22561

asked 19 hours ago

gibariangibarian

32

share|improve this question

edited 19 hours ago

JouleV

11.7k22561

asked 19 hours ago

gibariangibarian

32

edited 19 hours ago

JouleV

11.7k22561

edited 19 hours ago

JouleV

11.7k22561

asked 19 hours ago

gibariangibarian

32

asked 19 hours ago

gibariangibarian

32

1 Answer
1

active

oldest

votes

1

The effect comes from -- (axis cs:0,40), which is very high up but not vertically above the end point of the plot. This is one way to get a vertical line.

documentclass[tikz,border=3.14mm]{standalone}

usepackage{pgfplots}

pgfplotsset{compat=1.16}

begin{document}

begin{tikzpicture} [domain=0:4]

begin{axis}[axis lines = left,     xlabel = $lambda$,     ylabel = {$x$}, ] 

addplot[fill=red, opacity=.4,domain=1:6, samples=100,color=red, 

thick, mark=none ] {sqrt((0.1*x^(8)+x^(6)+0.3*x^(2)+3)/(x^(8)))} 

coordinate[pos=0] (aux0)  |- (aux0)

closedcycle; 

addlegendentry{$D(lambda)$} 

addplot[fill=blue, opacity=.4,domain=1:6,samples=100,color=blue, 

thick, mark=none]     {sqrt((0.1*x^(8)+x^(6)/3+0.1*x^(2)+5/3)/(x^(8)))} 

|- (aux0)closedcycle; 

addlegendentry{$f(lambda)$}



addplot[domain=3.2:6, fill=yellow!25,    

opacity=.4, samples=100,      color=green, thick, mark=none  ]     

{sqrt((0.1*x^(8)-x^(6)-0.3*x^(2)-1)/(x^(8)))} closedcycle; 



addlegendentry{$g(lambda)$}  

end{axis} 

end{tikzpicture}

end{document}

share|improve this answer

answered 19 hours ago

marmotmarmot

116k5147277

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hmm, took me a while to understand the coordinate[pos=0] (aux0) |- (aux0), one might easily think that ` (aux0) |- (aux0)` is what is being evaluated.
  
  – daleif
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @daleif Yes, this is TikZ syntax, and a similar question came up e.g. here.
  
  – marmot
  14 hours ago
  

  
  
  
  

add a comment | 

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1

The effect comes from -- (axis cs:0,40), which is very high up but not vertically above the end point of the plot. This is one way to get a vertical line.

documentclass[tikz,border=3.14mm]{standalone}

usepackage{pgfplots}

pgfplotsset{compat=1.16}

begin{document}

begin{tikzpicture} [domain=0:4]

begin{axis}[axis lines = left,     xlabel = $lambda$,     ylabel = {$x$}, ] 

addplot[fill=red, opacity=.4,domain=1:6, samples=100,color=red, 

thick, mark=none ] {sqrt((0.1*x^(8)+x^(6)+0.3*x^(2)+3)/(x^(8)))} 

coordinate[pos=0] (aux0)  |- (aux0)

closedcycle; 

addlegendentry{$D(lambda)$} 

addplot[fill=blue, opacity=.4,domain=1:6,samples=100,color=blue, 

thick, mark=none]     {sqrt((0.1*x^(8)+x^(6)/3+0.1*x^(2)+5/3)/(x^(8)))} 

|- (aux0)closedcycle; 

addlegendentry{$f(lambda)$}



addplot[domain=3.2:6, fill=yellow!25,    

opacity=.4, samples=100,      color=green, thick, mark=none  ]     

{sqrt((0.1*x^(8)-x^(6)-0.3*x^(2)-1)/(x^(8)))} closedcycle; 



addlegendentry{$g(lambda)$}  

end{axis} 

end{tikzpicture}

end{document}

share|improve this answer

answered 19 hours ago

marmotmarmot

116k5147277

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hmm, took me a while to understand the coordinate[pos=0] (aux0) |- (aux0), one might easily think that ` (aux0) |- (aux0)` is what is being evaluated.
  
  – daleif
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @daleif Yes, this is TikZ syntax, and a similar question came up e.g. here.
  
  – marmot
  14 hours ago
  

  
  
  
  

add a comment | 

1

The effect comes from -- (axis cs:0,40), which is very high up but not vertically above the end point of the plot. This is one way to get a vertical line.

documentclass[tikz,border=3.14mm]{standalone}

usepackage{pgfplots}

pgfplotsset{compat=1.16}

begin{document}

begin{tikzpicture} [domain=0:4]

begin{axis}[axis lines = left,     xlabel = $lambda$,     ylabel = {$x$}, ] 

addplot[fill=red, opacity=.4,domain=1:6, samples=100,color=red, 

thick, mark=none ] {sqrt((0.1*x^(8)+x^(6)+0.3*x^(2)+3)/(x^(8)))} 

coordinate[pos=0] (aux0)  |- (aux0)

closedcycle; 

addlegendentry{$D(lambda)$} 

addplot[fill=blue, opacity=.4,domain=1:6,samples=100,color=blue, 

thick, mark=none]     {sqrt((0.1*x^(8)+x^(6)/3+0.1*x^(2)+5/3)/(x^(8)))} 

|- (aux0)closedcycle; 

addlegendentry{$f(lambda)$}



addplot[domain=3.2:6, fill=yellow!25,    

opacity=.4, samples=100,      color=green, thick, mark=none  ]     

{sqrt((0.1*x^(8)-x^(6)-0.3*x^(2)-1)/(x^(8)))} closedcycle; 



addlegendentry{$g(lambda)$}  

end{axis} 

end{tikzpicture}

end{document}

share|improve this answer

answered 19 hours ago

marmotmarmot

116k5147277

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hmm, took me a while to understand the coordinate[pos=0] (aux0) |- (aux0), one might easily think that ` (aux0) |- (aux0)` is what is being evaluated.
  
  – daleif
  19 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @daleif Yes, this is TikZ syntax, and a similar question came up e.g. here.
  
  – marmot
  14 hours ago
  

  
  
  
  

add a comment | 

The effect comes from -- (axis cs:0,40), which is very high up but not vertically above the end point of the plot. This is one way to get a vertical line.

documentclass[tikz,border=3.14mm]{standalone}

usepackage{pgfplots}

pgfplotsset{compat=1.16}

begin{document}

begin{tikzpicture} [domain=0:4]

begin{axis}[axis lines = left,     xlabel = $lambda$,     ylabel = {$x$}, ] 

addplot[fill=red, opacity=.4,domain=1:6, samples=100,color=red, 

thick, mark=none ] {sqrt((0.1*x^(8)+x^(6)+0.3*x^(2)+3)/(x^(8)))} 

coordinate[pos=0] (aux0)  |- (aux0)

closedcycle; 

addlegendentry{$D(lambda)$} 

addplot[fill=blue, opacity=.4,domain=1:6,samples=100,color=blue, 

thick, mark=none]     {sqrt((0.1*x^(8)+x^(6)/3+0.1*x^(2)+5/3)/(x^(8)))} 

|- (aux0)closedcycle; 

addlegendentry{$f(lambda)$}



addplot[domain=3.2:6, fill=yellow!25,    

opacity=.4, samples=100,      color=green, thick, mark=none  ]     

{sqrt((0.1*x^(8)-x^(6)-0.3*x^(2)-1)/(x^(8)))} closedcycle; 



addlegendentry{$g(lambda)$}  

end{axis} 

end{tikzpicture}

end{document}

share|improve this answer

answered 19 hours ago

marmotmarmot

116k5147277

documentclass[tikz,border=3.14mm]{standalone}

usepackage{pgfplots}

pgfplotsset{compat=1.16}

begin{document}

begin{tikzpicture} [domain=0:4]

begin{axis}[axis lines = left,     xlabel = $lambda$,     ylabel = {$x$}, ] 

addplot[fill=red, opacity=.4,domain=1:6, samples=100,color=red, 

thick, mark=none ] {sqrt((0.1*x^(8)+x^(6)+0.3*x^(2)+3)/(x^(8)))} 

coordinate[pos=0] (aux0)  |- (aux0)

closedcycle; 

addlegendentry{$D(lambda)$} 

addplot[fill=blue, opacity=.4,domain=1:6,samples=100,color=blue, 

thick, mark=none]     {sqrt((0.1*x^(8)+x^(6)/3+0.1*x^(2)+5/3)/(x^(8)))} 

|- (aux0)closedcycle; 

addlegendentry{$f(lambda)$}



addplot[domain=3.2:6, fill=yellow!25,    

opacity=.4, samples=100,      color=green, thick, mark=none  ]     

{sqrt((0.1*x^(8)-x^(6)-0.3*x^(2)-1)/(x^(8)))} closedcycle; 



addlegendentry{$g(lambda)$}  

end{axis} 

end{tikzpicture}

end{document}

share|improve this answer

answered 19 hours ago

marmotmarmot

116k5147277

answered 19 hours ago

marmotmarmot

116k5147277

answered 19 hours ago

marmotmarmot

116k5147277