Description:
Mathematica discussion group. (Moderated)
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Labelling a plot with maximum
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Hi everyone, I am very new to Mathematica. I wish to prepare a figure and a movie where the maximum of the plot is labelled on the figure. I am using Manipulate to animate a function as shown below: jinc[x_] := BesselJ[1, 2 \[Pi] x]/(2 \[Pi] x); f[x_, \[CapitalDelta]_] := 4 Abs[jinc[x + \[CapitalDelta]] - jinc[x - \[CapitalDelta]]]^2;... more »
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"If" syntax question
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I downloaded the cylinder net demonstration code to show my middle school class. I thought it was pretty good but needed a few enhancements before I used it in class. One thing I wanted the animation to show was the circle radius rotating when the circles were left in their flat orientation. So I modified the... more »
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Information about method and parameters used in NDSolve
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Hi. I'm trying to solve a set of coupled differential equations numerically with different methods implemented by myself which I try to compare to the solution provided by NDSolve. Is there anyway to obtain information about which of the numerical methods implemented i Mathematica is used for my... more »
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compositions with the restricted set of integers
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IntegerPartitions has a useful option restricting the values of partitions. For example, IntegerPartitions[6,2,{1,2,3,4 ,5,6}] . Does it exist for Compositions? What I am looking for is a substitute for a lengthy and inefficient approach described below. We through n dice. How many outcomes *outs*correspond to the face total equal... more »
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bug in Mathematica 7?
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For Limit[EllipticTheta[3, 0, x], x -> 1, Direction -> 1], Mathematica 7.0.0. returns 0. However, the correct answer should be +infinity.
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Finding multiple value in Complex Analysis
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Given a complex number ( -1+2I ) and an expression z^(1/2) How do I find all the possible values like z == -Sqrt[-1 + 2 I] || z == Sqrt[-1 + 2 I] I can find it using Reduce[z^2== (-1+2I),{z}] But this leaves me with a problem of how to convert Z^(1/2) into Z^2 So given an arbitrary expression of Z, how do I convert it to a form... more »
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Freeze Panes in Grid Expression (addendum)
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The following suppresses scroll bars that are not needed and uses VerticalSlider for scrolling rows (with direction reversed). scrollMatrix[m_?MatrixQ, rows_Integer, columns_Integer] := Module[{maxR, nC = Min[columns, Length[m[[1]]]], nR = Min[rows, Length[m]]}, maxR = Length[m] - nR + 2;... more »
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Batch save mode?
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I'm going to be away from my copy of Mathematica for a while and may potentially want to show the work I've been doing for some friends. I have several dozen notebooks and don't really want to save them all manually; is there an easy way to get Mathematica to batch load notebooks and save them as PDF?... more »
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