David Carraher
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 Apr23 comment Reconstruction of interrupted paths in images ImageCorners reference.wolfram.com/language/ref/ImageCorners.html may be useful for step 1. Mar7 comment Pull out scaling factor from a denominator Algohi, That seems to be a general solution to the problem. Mar7 comment Pull out scaling factor from a denominator Algohi, try ((2 + x)/7)[[2]] Mar7 comment VertexLabels, EdgeLabels and the direction of the arrows on a directed graph You should be able to find solutions to all of your problems by consulting the documentation. See GraphicsGrid,VertexCoordinates, EdgeStyle, etc... Mar1 comment Font presentation difference between version 9 and version 10 Looks fine on my MacBook with Mathematica v. 10.0.2 The font is heavier than your upper image, but far smoother than your lower image. Shouldn't Georgia be a serif font? Your lower image is sans serif. Feb25 comment Dynamically Update both a HorizontalGauge range and the value This seems to offer more general solution (which is great because I want to add additional scales), but the lower marker sometimes jambs, sitting immobile while the upper marker is being dragged. Feb22 comment Fine precision control in IntervalSlider Basically, I want students to be able to explore a number line by zooming in or out at will. I plan to have multiple Horizontal Gauges on display at once. But I am still thinking about the functionality, the operations I want students to be able to apply. Feb21 comment Fine precision control in IntervalSlider Good point. I hadn't tried adjusting the interval size! Feb16 comment What is Association[Rule[“ID”,number ] and how it is used I'm puzzled. Look at TreeForm[ds1] and then ds1[[1]]. How can you get the full list of data out of the dataset? Feb16 comment Using GraphData to generate all directed graphs with n vertices I wasn't aware of that limitation. Thanks. Feb13 comment How can I stop Mathematica from re-arranging formulae in TraditionalForm? Feb11 comment Automatically convert pairs of directed edges to an undirected edge? Mr.Wizard You are indeed perceptive. Yes, I was. Feb11 comment Automatically convert pairs of directed edges to an undirected edge? +1 for using Union instead of Sort and Union Feb11 comment Automatically convert pairs of directed edges to an undirected edge? Would you clarify how /. {{_[a_, b_], __} :> a <-> b, {x_} :> x} works? I don't fully understand _[a_, b_] but it seems to be an opaque variation of belisarius' Rule[a_,b_]. Feb10 comment LinearModelFit[] of simulated data One possible title: "How do I simulate raw data (with measurement error) from a known function?" Feb8 comment Using GraphData to generate all directed graphs with n vertices A generalization of your method for labeling: graphs[n_] := Module[{c, cb}, c = GraphData["Connected", n]; cb = GraphData[#, "EdgeRules"] & /@ c; Row[Column[GraphData[#, {"StandardName", "Image"}]] & /@ c, Spacer[10]]] Feb8 comment Using GraphData to generate all directed graphs with n vertices +1 Nice use of graph names, "Connected", and isomorphism. Feb5 comment Finding a “not-shortest” path between two vertices My goodness, this really does work. I never used FindPath and am curious to get a sense of how it works. Jan29 comment Can Mathematica Handle Open Intervals? Interval complements? I used Mathematica v.9 (or v. 8). I must have drawn everything "by hand". If I were to do it with v.10, I would use NumberLinePlot[{{-\[Infinity] < x < -2, -1 < x <= 1, 4 < x <= Pi^2}}, x] and so forth. Jan28 comment Find intersecting rectangles groups I assume that means that the empty region is indeed a region.