tikz

I am using pgf/tikz graphics and I'm wondering how one can control the scaling of font sizes in the graphics when using them in minipage/subfig environments? Is there a way to manually set a permanent font size for pgf/tikz graphics or in latex in general so as to make font sizing invariant to scaling? Ideally I'd like to be able to manually specify a font size per graphic or for all graphics or subfig/minipage environments? Here is an example of the usage as suggested. Thanks for the help. \begin{figure}[h] \centering \subfloat[Graph 1]{ \begin{minipage}[h]{0.7\linewidth} \centering

Say I want to construct a circulant graph in TikZ, with a variable number of nodes, labelled v0, v1, ..., v_n-1 for some n of my choice (say, 5). I'd like to be able to use the \foreach command in TikZ to iteratively (1) define the nodes, and (2) connect the nodes. I'd like to be able to connect v_i to v_(i+1) and v_i to v_{i+2}, say. \foreach \i in {0, ..., 4} {\path (\i*72:3) node (v\i) {};} constructs the nodes perfectly. But then when I want to draw some lines, \foreach \i \in {0, ..., 3} { \draw (v\i) -- (v{\i+1}); } ???? doesn't work. Nor does \foreach \i / \j in {0/1, ..., 3/4} { \draw

R Markdown is a good tool for document authoring. It can use Latex statement in R Markdwon directory. But when I try to insert a TikZ picture, I am lost about how to add preamble \usepackage{tikz} in it, so compile will fail. example code: --- title: "R Markdown with tikz picture" author: "Me" date: "January 10, 2015" output: beamer_presentation --- ## TikZ picture - Here is a TikZ picutre \begin{tikzpicture} \draw (0,0) circle (2cm); \end{tikzpicture} Since actually it will generate a latex document, so it's fine to just add it in latex then compile it to pdf, but I wish I can just do it in R

I'm using TikZ to draw diagrams in LaTeX that I then want to isolate as image files to put online. My guess is there is a way to extract these diagrams directly without having to tease them out of the finished .pdf file. How would I go about doing that? (If it matters, I'm using TeXnicCenter.) Following up on my comment: Cirkuit converts TikZ diagrams into images by running something like the following sequence of commands: pdflatex img.tex pdftops -eps img.pdf convert -density 300 img.eps img.png Here img.tex would be a LaTeX file that follows this template: \documentclass{article}

Hi I really have googled this a lot without any joy. Would be happy to get a reference to a website if it exists. I'm struggling to understand the Hadley documentation on polar coordinates and I know that pie/donut charts are considered inherently evil. That said, what I'm trying to do is Create a donut/ring chart (so a pie with an empty middle) like the tikz ring chart shown here Add a second layer circle on top (with alpha=0.5 or so) that shows a second (comparable) variable. Why? I'm looking to show financial information. The first ring is costs (broken down) and the second is total income.