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Hot answers tagged version-8

18

There is a public, but undocumented, function called GeometricFunctionsDecodeFilledCurve which helps to decode this type of undocumented FilledCurve: GeometricFunctionsDecodeFilledCurve[ FilledCurve[{{{0, 2, 0}, {0, 1, 0}, {0, 1, 0}, {0, 1, 0}, {0, 1, 0}}}, {{{12.887695983062486, 5.160000000000004}, {1.8237311169604027, 5.160000000000004}, ...

15

Go into the option inspector, and try the different settings for Graphics Options > RenderingOptions > "Graphics3DRenderingEngine and see if that has any effect. Edit This option can be set on a per-graphic basis, say by using Style: AbsoluteTiming[ Rasterize[ Style[Graphics3D[{Opacity[0.1], Sphere[{0, 0, 0}, #] & /@ Range[20]}, ...

15

Short answer: I hope Export["foo.pdf", plot,Background->None] fixes it. Let's get there step by step. First, Acrobat X Pro on my Mac reports that both your PDF files are fine. They print fine, and pass all tests with flying colors. I uncompressed the PDF (thanks pdftk) and a diff on them reveals that one weird object that only appears in your ...

15

This happened to me too and apparently, is a problem with the student version. Arnoud helped me figure out a work around for this. In your $UserBaseDirectory/Licensing, you should find a mathpass file that looks something like this: (*userregistered*) machineName1 ID ActivationKey1 Expiration1 UserName machineName2 ID ActivationKey2 Expiration2 UserName ... 15 Unfortunately, there is no solution. Dump (.mx) files are explicitly documented as being non-portable between different versions, and even between different builds of the same version (e.g. 32- and 64-bit versions for a given platform, or those for two different platforms). As such, you must re-generate your .mx files for version 9 either from the original ... 13 You can use Graph itself much like Show. However, you pass the essential data from the graph as the first argument, rather than the graph itself. (Graph[g,....] will not work.) g = Graph[{1 -> 8, 1 -> 11, 1 -> 18, 1 -> 19, 1 -> 21, 1 -> 25, 1 -> 26}, VertexLabels -> "Name", ImagePadding -> 10] Graph[EdgeList[g], ... 13 You could use SetProperty. For example g = Graph[{1 -> 2, 2 -> 4, 3 -> 4}] SetProperty[g, VertexLabels -> {"Name", 2 -> "Two"}] 12 Changing shortcuts isn't that complicated. All you have to do is change one line in the file KeyEventTranslations.tr in a location in your file system specified by this command: FileNameJoin[{$InstallationDirectory, "SystemFiles", "FrontEnd", "TextResources", \$OperatingSystem}] Locate the following line in a text editor and change the key into the one ...

12

This is fixed in version 9. This came up on MathGroup before. Since it hasn't been fixed for so long, I wasn't sure if it was really a bug, so I did some spelunking (and some speculation) today to find out what's happening. To jump to the end: I think it's a bug. First, let's see what arguments does LogLinearPlot really pass to the function: ...

12

You need to first do a series connection of the PID controler to the plant. This gives the open loop transfer function. Then do a unity feedback connect to close the loop, like this plant = StateSpaceModel[{x''[t] == u[t] - x'[t]}, {{x''[t],0}}, {{u[t], 0}}, x[t], t]; kip = 5; ki = -0.00001; kid = 0.01; pid = TransferFunctionModel[(kip*s + ki + kid*s^2)/s, ...

11

Actually, as we can use Tooltip on elements directly this is a cleaner method: label = Tooltip[{##2}, Grid[{ {"Name", #}, {"Usability ", #2}, {"Relevancy", #3}, {"Market Size", #4} }, Frame -> All, Alignment -> Left ]] &; BubbleChart[ label @@@ data3, ChartStyle -> 24 ] How about this? ...

11

Looks like a bug in V8.0.0 that was fixed in V8.0.1. Seems to be triggered in part when the argument is a packed array: (* V8.0.0 *) In[2]:= digits = Reverse@IntegerDigits[1000]; In[3]:= LengthWhile[digits, 0 === #&] Out[3]= 0 In[4]:= LengthWhile[Developer`FromPackedArray[digits], 0 === #&] Out[4]= 3 which would explain why it worked when ...

10

Suppose we have a Graphics object which depends on some parameters and a controller with which we want to control these parameters. This could be done easily enough using the second argument of Dynamic, for example gr[pts_, col_, radius_] := Graphics[{col, Disk[#, radius] & /@ pts}, PlotRange -> {{0, 3}, {0, 3}}, ImageSize -> 200]; contrl = ...

7

After consulting a friend of mine P.M. I can tell you this. First of all as @Szabolcs @ruebenko already mentions - in order to get a comparison with Wavelet explorer (v7) to v8, you can go to the following link in the documentation center which shows how the syntax has changed: ...

7

I'm answering mainly to show solidarity with the idea, although my own efforts at finding a systematic upgrade path with graceful degradation to older versions have ultimately been overtaken by the amount of new and different functionality introduced starting with version 6. Particularly version 6 was a real nuisance because it was so different from both: ...

7

Just playing around, Mathematica gives the correct solution : int2 = FullSimplify[Integrate[TrigExpand[Sin[x] Csc[4 x]], x]]; FullSimplify@D[TrigToExp[int2], x] (* Csc[4 x] Sin[x] *) The real part of the two solutions match but the imaginary parts do not : check = 1/8 Log[Sin[x] - 1] - 1/8 Log[Sin[x] + 1] + Sqrt[2]/4 ArcTanh[Sqrt[2] Sin[x]]; ...

7

Looks like you get small imaginary residuals that are not chopped in V8 (but are in V9). Plot[eigen[[1]] // Im, {k, 0, \[Pi]}] Adding a Re (or Chop or similar) gets rid of those for good: Plot[eigen[[1]] // Re, {k, 0, \[Pi]}]

6

You can also use hotstrings as a way of autocompletion. By using such replacements, words are immediately replaced by another word on typing a space after the hotstring: CreateDocument[{}, InputAutoReplacements -> {"sync" -> SynchronousInitialization}] You can set such replacements globally under Option Inspector (CtrlShiftO). Of course no one would ...

6

This is definitely a bug. I emailed Wolfram support and got the following reply: Hello, Thank you for your email. I have reproduced this problem. It seems that PathGraph doesn't like variable names like v2, x, and l, but generally works for other variable names. I have filed a report with our developers on this issue. Your contact ...

6

Here's a summary of the answer I gave to a question very similar to this one on stack overflow. In essence, each triple represents a segment of the curve where the first digit in the triples indicates the type of curve used. Here, 0 indicates a Line, 1 or 2 a BezierCurve, and 3 a BSplineCurve. The difference between 1 and 2 is that with option 2, an extra ...

6

As far as I can tell, the only valid specifications for that first argument seem to be permutations of the input you have and similar lists of triplets. If the list is one element shorter than the second argument, all points in the second argument are points in the list, and the one corresponding to the element {0,2,0} in the first argument is the starting ...

6

The problem is very simple :) eq = 2 x - y == 0 evaluates to False. To make it work, simply defer the evaluation: eq := 2 x - y == 0 ContourPlot3D[Evaluate@eq, {x, -10, 10}, {y, -10, 10}, {z, -10, 10}, ContourStyle -> Opacity[0.5], Mesh -> False]

5

How about a 'Next page' button that becomes active only if the user has seen or at least scrolled to a particular part of a page, a disclaimer for instance? EDIT As requested: this was what I had in mind texts = ExampleData["Text"]; i = 1; imax = texts // Length; bottomSeen = False; Panel[ Column[ { Button["Next page", If[i <= imax, i++, i = 1]; ...

5

First, I cannot reproduce your issue on Mathematica 8.0.1.0 on 64-bit Linux (CentOS 5.8). But I compare what you obtain and what I see, and I think I have an idea. The notebook does not specifically require fonts, and as such, the font for e.g. your title cell is system-dependent. On my Mac, it uses a bold Helvetica in size 36, while on my Linux box it ...

5

Mathematica 8 will only run on the Surface Pro since it has a x86 processor (Ivy Bridge Core i5) and runs Windows 8 Pro (which is the same as the desktop/laptop version). The Surface RT will have an ARM processor which means that if you want software to run on it, you should recompile it for ARM. Mathematica 8 is not compiled for ARM, so it will not run. ...

4

I find it easiest to create a Notebook with the features I want, and then open that Notebook to launch Mathematica. Save this code as a .nb file. If you want Mathematica to also open "Maximized" rather than in the slightly-less-than-Maximized form it usually does, also create a shortcut to this Notebook and change the properties to Maximized, then use ...

4

It seems to me that it is not so much that something would be hard to implement without DynamicWrapper but that using that function offers an alternative and perhaps cosmetically/aesthetically better option. My typical usage would be where I need to have an expression or compound expression dynamically evaluate (things that come to mind are evaluations that ...

4

As mentioned in the comments, there are a few indications in OS X that a notebook has been modified. there is a small black dot in the middle of the window's red close button the notebook's proxy icon is dimmed out

4

I don't know why it doesn't work on your system (it does mine), but perhaps this will help: getSegments[lst_, test_] := SplitBy[lst, test][[ If[test @ First @ lst, 1, 2] ;; ;; 2 ]] getSegments[{1, -2, 3, 4, 5, -3, -4, 9, 7, 0, 8}, Positive] {{1}, {3, 4, 5}, {9, 7}, {8}} I found an older question that relates to this. It's apparently a known bug ...

4

Taking derivatives of your "correct answer" and comparing with the integrand, shows they are not that equal: While taking derivatives of Mma's result gives:

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