Hcfyk

The following code renders the graphs of an arc of a circle and the standard parabola on the Cartesian plane. It is ridiculously small, though. How do I magnify the display, except for the labels on the axes? (I do not want to use pgfplots.)

documentclass{amsart}

usepackage{amsmath}

usepackage{amsfonts}



usepackage{tikz}

usetikzlibrary{calc,intersections}







begin{document}





noindent hspace*{fill}

begin{tikzpicture}

%An arc of a circle centered at (0, 1/2) and the standard parabola are drawn on the Cartesian plane.

draw[fill] (0,1/2) circle (1.5pt);

draw[blue] ($(0,1/2) +(150:1/2)$) arc (150:390:1/2);

draw[domain={-sqrt(3)/2}:{sqrt(3)/2}] plot (x, {x*x});

draw[latex-latex] ($(-12.5pt,0) +({-1/sqrt(2)},0)$) -- ($(12.5pt,0) +({1/sqrt(2)},0)$);

draw[latex-latex] (0,-1/2) -- ($(0,3/4) +(0,12.5pt)$);

node[below right] at ($({1/sqrt(2)}, 0) +(12.5pt,0)$){textit{x}};

node[above right] at ($(0,3/4) +(0,12.5pt)$){textit{y}};



end{tikzpicture}

hspace{fill}







end{document}

• I add scale option. I think scale=5 is appropriate in this case.


• I don't use your approach to center figures. I would use figure and add a caption as well as a label instead. If you don't want a caption and a label, you should use center environment.


• I changed a draw[fill] to fill.

documentclass{amsart}

usepackage{amsmath}

usepackage{amsfonts}

usepackage{tikz}

usetikzlibrary{calc,intersections}

begin{document}

begin{figure}

centering

begin{tikzpicture}[scale=5]

%An arc of a circle centered at (0, 1/2) and the standard parabola are drawn on the Cartesian plane.

fill (0,1/2) circle (0.3pt); % Note that it is not 1.5pt

draw[blue] ($(0,1/2) +(150:1/2)$) arc (150:390:1/2);

draw[domain={-sqrt(3)/2}:{sqrt(3)/2}] plot (x, {x*x});

draw[latex-latex] ($(-12.5pt,0) +({-1/sqrt(2)},0)$) -- ($(12.5pt,0) +({1/sqrt(2)},0)$);

draw[latex-latex] (0,-1/2) -- ($(0,3/4) +(0,12.5pt)$);

node[below right] at ($({1/sqrt(2)}, 0) +(12.5pt,0)$){textit{x}};

node[above right] at ($(0,3/4) +(0,12.5pt)$){textit{y}};

end{tikzpicture}

caption{Some caption}

label{fig:tikzfigure}

end{figure}

end{document}

Or if you want to have your image automatically resized to textwidth, have a look at the nice tikzscale package.

begin{filecontents}{mypic.tikz}

begin{tikzpicture}

%An arc of a circle centered at (0, 1/2) and the standard parabola are drawn on the Cartesian plane.

fill (0,1/2) circle (0.3pt);

draw[blue] ($(0,1/2) +(150:1/2)$) arc (150:390:1/2);

draw[domain={-sqrt(3)/2}:{sqrt(3)/2}] plot (x, {x*x});

draw[latex-latex] ($(-12.5pt,0) +({-1/sqrt(2)},0)$) -- ($(12.5pt,0) +({1/sqrt(2)},0)$);

draw[latex-latex] (0,-1/2) -- ($(0,3/4) +(0,12.5pt)$);

node[below right] at ($({1/sqrt(2)}, 0) +(12.5pt,0)$){textit{x}};

node[above right] at ($(0,3/4) +(0,12.5pt)$){textit{y}};

end{tikzpicture}

end{filecontents}



documentclass{amsart}

usepackage{amsmath}

usepackage{amsfonts}

usepackage{tikz}

usetikzlibrary{calc,intersections}

usepackage{tikzscale}

usepackage[showframe]{geometry}

begin{document}

begin{figure}

centering

includegraphics[width=textwidth]{mypic.tikz}

caption{Some caption}

label{fig:tikzfigure}

end{figure}

end{document}

[First code improved]

I suggest not using a filled circle for coordinate. A node is more ok I think. Also a node is not scaled by scale.

documentclass{amsart}

usepackage{amsmath}

usepackage{amsfonts}

usepackage{tikz}

usetikzlibrary{calc,intersections}

tikzset{your coordinate/.style={fill=black,inner sep=0.5pt,circle}}

begin{document}

begin{figure}

centering

begin{tikzpicture}[scale=5]

%An arc of a circle centered at (0, 1/2) and the standard parabola are drawn on the Cartesian plane.

node[your coordinate] at (0,1/2) {};

draw[blue] ($(0,1/2) +(150:1/2)$) arc (150:390:1/2);

draw[domain={-sqrt(3)/2}:{sqrt(3)/2}] plot (x, {x*x});

draw[latex-latex] ($(-12.5pt,0) +({-1/sqrt(2)},0)$) -- ($(12.5pt,0) +({1/sqrt(2)},0)$);

draw[latex-latex] (0,-1/2) -- ($(0,3/4) +(0,12.5pt)$);

node[below right] at ($({1/sqrt(2)}, 0) +(12.5pt,0)$){textit{x}};

node[above right] at ($(0,3/4) +(0,12.5pt)$){textit{y}};

end{tikzpicture}

caption{Some caption}

label{fig:tikzfigure}

end{figure}

end{document}

You can (should) also apply this to the second code. Btw, I think your circle is way too small.

Another option that might help if you want to save scale for relative scaling and/or are using transform shape is just to redefine the unit vectors. In this example, this is equivalent to Joule V's suggestion, but in the above-mentioned situations it might be useful to know about this option, too.

documentclass{amsart}

usepackage{amsmath}

usepackage{amsfonts}

usepackage{tikz}

usetikzlibrary{calc}

begin{document}

begin{tikzpicture}[x=5cm,y=5cm]

draw[fill] (0,1/2) circle (1.5pt);

draw[blue] ($(0,1/2) +(150:1/2)$) arc (150:390:1/2);

draw[domain={-sqrt(3)/2}:{sqrt(3)/2}] plot (x, {x*x});

draw[latex-latex] ($(-12.5pt,0) +({-1/sqrt(2)},0)$) -- ($(12.5pt,0) +({1/sqrt(2)},0)$);

draw[latex-latex] (0,-1/2) -- ($(0,3/4) +(0,12.5pt)$);

node[below right] at ($({1/sqrt(2)}, 0) +(12.5pt,0)$){$x$};

node[above right] at ($(0,3/4) +(0,12.5pt)$){$y$};

end{tikzpicture}

end{document}