TikZImages

Graphic Images, TikZImages

This example shows how to create an image/plot using Tikz.

Problem Techniques Index

PG problem file	Explanation
DOCUMENT(); loadMacros( "PGstandard.pl", "MathObjects.pl", "PGML.pl", "PGtikz.pl" ); TEXT(beginproblem());	Initialization: It is important to include the PGtikz.pl macro.
$graph_image = createTikZImage(); # Only change the extenstion if the display mode is not TeX. The extension is automatically set # to 'pdf' by the macro if the display mode is TeX, and this overrides that which breaks # hardcopy generation. $graph_image->ext('svg') if $displayMode ne 'TeX'; $graph_image->tikzLibraries("arrows.meta"); $graph_image->BEGIN_TIKZ \draw[<->,thick] (-11,0) -- (11,0) node[above left,outer sep=2pt]{\(x\)}; \draw[<->,thick] (0,-11) -- (0,11) node[below right,outer sep=2pt]{\(y\)}; \foreach \x in {-10,-8,...,-2,2,4,...,10} \draw[thin] (\x,5pt) -- (\x,-5pt) node[below]{\(\x\)}; \foreach \y in {-10,-8,...,-2,2,4,...,10} \draw[thin] (5pt,\y) -- (-5pt,\y) node[left]{\(\y\)}; \draw[<->,red] plot[domain={-3.2+$a}:{3.2+$a}] (\x,{pow(\x-$a,2)+$b}); END_TIKZ	Setup: The createTikZImage() function creates an image to be built using tikz. The $graph_image->ext('svg') if $displayMode ne 'TeX'; will generate a SVG image, which will generally look better than PNG. The $graph_image->tikzLibraries("arrows.meta"); will load the arrows.meta Tikz library. The actual tikz image is built between $graph_image->BEGIN_TIKZ and END_TIKZ Notes: on using this and related Contexts.
BEGIN_PGML [@ image(insertGraph($graph_image), width => 300, tex_size => 1000) @]* END_PGML	Main Text: This is how to insert the tikz image. Note the width and tex_size parameters can change the size of the image on the web and as hardcopy.
ENDDOCUMENT();	This doesn't have a question, so we aren't checking an answer.

Problem Techniques Index

• POD documentation: nameOfMacro.pl.html
• PG macro: nameOfMacro.pl