On Thu, Nov 3, 2011 at 1:37 PM, Paul Smith <phh...@gmail.com> wrote: > Dear All, > > Is there some way of drawing in a LyX document a chain rule diagram? > Please, see an example of what I am wanting at: > > http://tutorial.math.lamar.edu/Classes/CalcIII/ChainRule_files/image001.gif > > Thanks in advance, > > Paul >
While there is no direct way of doing that in lyx, there are useful alternatives. My favourite is the XY-pic package (http://www.tug.org/applications/Xy-pic/), which is useful for all kinds of diagrams. To use it you need to install XY-pic (the 'xy' latex package), and in LyX, in the preamble (Documents->Settings->LaTeX preamble) you should write \usepackage[all]{xy} \newcommand{\pd}[2]{\frac{\partial #1}{\partial #2}} %this line is only for your specific diagram Then in the body, you create an ERT box (Ctrl-L) and inside you can put the following: \[ \xymatrix{ & & & z \ar@{-}[dll]_{\pd{z}{x}} \ar@{-}[drr]^{\pd{z}{y}} & & & \\ & x \ar@{-}[dl]_{\pd{x}{s}} \ar@{-}[dr]^{\pd{x}{t}} & & & & y \ar@{-}[dl]_{\pd{y}{s}} \ar@{-}[dr]^{\pd{y}{t}} & \\ s & & t & & s & & t \\ } \] A first look at this might seem daunting, but once you read the xy user's guide it will seem quite straight-forward. -- Ernesto Posse Modelling and Analysis in Software Engineering School of Computing Queen's University - Kingston, Ontario, Canada
