For questions specific to Version 8 of Mathematica.
2
votes
0answers
89 views
Derivatives of list elements
Could someone explain the odd behavior of the Derivative function when drawing arguments from lists? We have,
...
8
votes
2answers
134 views
Problem with NIntegrate when WorkingPrecision is specified
I am trying to evaluate this integral numerically:
$$
\int_0^{\infty } m \exp (-m) J_1(m){}^2 \, dm
$$
Everything is OK when only the integration method is specified:
...
2
votes
1answer
68 views
The proper way to write the input for a certain series
Mathematica tells the series below doesn't converge. I think it converges. What would the
proper way to write things be as an input?
...
2
votes
2answers
165 views
Animating the Lorenz Equations
I am trying to use the Animate command to vary a parameter of the Lorenz Equations in 3-D phase space and I'm not having much luck.
The equations are:
...
4
votes
1answer
108 views
Plot an undefined function
When I plotted an undefined function, Mathematica also spends considerable time to process it.
It returns a blank figure necessarily.
What confuses me is where the ...
1
vote
1answer
126 views
ErrorListPlot Legend with Markers
I'm trying for some days now to integrate markers in my legend. I have a ErrorListPlot with markers and a legend but difficulties to realize the markers in the legend as well. Thanks a lot for your ...
5
votes
0answers
81 views
Expansion of $E(i c \mid m)$ at $c\to\infty$?
Currently, I am using a Windows machine with Mathematica 8. I noticed a difference in a series expansion of the function EllipticE[] in comparison with a result ...
3
votes
1answer
56 views
Reading RData files without RLink
I am using Mathematica 8. I would like to read some RData files which I have received. I do not currently have an installation of R on the machine with Mathematica.
2
votes
1answer
82 views
2
votes
0answers
125 views
Can not launch Mathematica 8 on Lubuntu
I am trying to launch Wolfram Mathematica 8 Home Edition. The installation itself occurred without a hitch.
Note: "..." indicates my machine name, username, etc.
Linux Version
...$ uname -a
Linux ...
3
votes
1answer
127 views
Sum of positive terms gives negative answer
Mathematica evaluates Sum[((n - y - 1)*(n - y)^2*n^y)/y!, {y, 0, n - 2}] as -2 e^n n. This should not be a negative value. ...
4
votes
0answers
110 views
Version 8.0 integrates but Version 9.0.1 doesn't
I am trying to run the following integral in version 9.0, but it fails:
...
4
votes
1answer
171 views
A Graphics`Mesh`ConvexHull[] peculiarity
I have been unable to explain the behavior of Graphics`Mesh`ConvexHull[] on the following (highly simplified) example:
...
8
votes
0answers
496 views
Download Mathematica 8 Trial
My school uses mathematica 8 on several of their computers.
I would like to download a trail version for my home computer.
I would like the same version. Is there a place I can download mathematica ...
8
votes
2answers
179 views
2
votes
0answers
179 views
mathematica startup time
I have Mathematica 7 and 8 installed on my laptop.
Mathematica 7 starts quite fast, but Mathematica 8 is extremely slow to start.
In the Option Inspector I canceled the "welcome screen" option at ...
0
votes
0answers
43 views
How to texturize ordinary plot [duplicate]
Possible Duplicate:
Coloring Points in a List Plot
I have plot like
ListPlot[Table[{y, y^2}, {y, -1, 1, 0.1}]]
and I would like to colour each of ...
4
votes
1answer
294 views
Problem with plotting eigenvalues
I want to plot the eigenvalues of a matrix which is dependant on a parameter (well, actually I want to plot a tight-binding electronic band structure). The dimension of the hamitonian matrix is ...
4
votes
1answer
205 views
Using DistributionFitTest on custom distributions in Mathematica 8
I originally posted this question on Stack Overflow, but I didn't get any answers, and I'm hoping to have better luck here.
I'm trying to compute the goodness-of-fit of a bi-modal Gaussian ...
2
votes
4answers
176 views
How to evaluate this indefinite integrate $\csc(4x)\sin(x)$
I tried to integrate the following integral using Integrate[Sin[x]Csc[4x],x] and I am getting a strange result.
$$\frac{1}{8 \sqrt{2}}\left(-2 i ...
3
votes
0answers
77 views
An recurrence equation that can be solved in version 7 but not in version 8
A friend of mine showed me this code sample:
RSolve[{a[n] == a[n - 5] + 1, Sequence @@ Table[a[i] == 1, {i, 5}]}, a[n], n] // Timing
It's solved by version 7 in ...
2
votes
1answer
133 views
Version 7 and 8, different behavior of NSolve. Is it reproducible?
I noticed the following difference, and I wonder if it's a problem of my system or the results difference is actually due to the two different versions
...
3
votes
1answer
79 views
Discrepancy with TakeWhile between RandomInteger result and list on Linux
I have to following code that solves a problem for me. The example that is given to us is as follows:
lst = {1,-2, 3, 4,5,-3, -4, 9,7,0,8}, predicate = ...
1
vote
1answer
260 views
PlotLegends doesn't work on Plot3D-V8.0.0
I am trying to plot in 3D and I need to use PlotLegend. My code is
...
6
votes
0answers
112 views
Break[] inside ColorFunction
f[x_?NumericQ]:= (Do[Break[],{i,1,2}];x)
Plot[x,{x,0,1},ColorFunction->(ColorData["Rainbow"][f[#]]&)]
Break::nofwd: No enclosing For, While, or Do found ...
8
votes
1answer
324 views
Mathematica 9 does not read mathematica 8 “.mx” files
Having written a lot of code on M8, I recently switched to M9 and tried to run the code on M9, the code starts by loading an .mx file written by M8, but M9 wouldn't read the .mx file saying that it ...
18
votes
1answer
2k views
Install trial version of Mathematica 9 next to genuine Mathematica 8
This morning I installed the trial version of Mathematica 9. After I discovered that Export[] is disabled in trial versions, I wanted to use my genuine Mathematica ...
21
votes
0answers
386 views
What calendar is Mathematica using for dates in the distant past?
It appears that Mathematica treats all dates as proleptic Gregorian dates by default, a hypothesis that can be easily tested by using AbsoluteTime to compute the ...
4
votes
1answer
78 views
Strange behavior of DateList when converting string
DateList experiences some strange behavior which i cannot explain.
This code works fine:
...
7
votes
1answer
147 views
How do you use SystemsModelFeedbackConnect?
I'm trying to grasp the new control system functions in Mathematica 8. I'd like to connect a controller model to a model of a plant to simulate the behavior of the system.
I define a simple servo ...
1
vote
1answer
1k views
Does Mathematica v.8 (or will v.9) run on Windows 8 systems with ARM processors? (like the MS Surface Tablet)
Today I was reading that the Microsoft Surface RT is available for pre-order. (For the curious, click here.)
I know the version of Widows 8 that runs on x86 processors should be compatible already ...
-1
votes
1answer
305 views
Need help with solving non-linear differential equation [closed]
I am new to using Mathematica and have a problem at hand: I need to solve
$y''(x)+ a \sin(y(x)) = 0$ and plot the output, I need a "manipulate" thingy for the two initial conditions. Help needed.
3
votes
1answer
148 views
Mathematica 8 and window names for modified files
I do not know if this is particular to Mac OS, but with version 8, the window name of a notebook no longer changes (with an appended *) when it is modified, as it used to do with version 7 (as well as ...
3
votes
2answers
2k views
Does Mathematica 8 work on Windows 8?
I just saw that Windows 8 RTM has showed up on Technet, and I've been wondering if I should upgrade my main machine. I've been trying to determine the compatibility of various app with Windows 8 and ...
0
votes
1answer
123 views
How to enable-dynamics on CDF's on web?
Went through the wizard to export cdf /w embed code:
The positions and sizing are correct, but there's no interactive side to it:
data I'm using:
...
7
votes
1answer
143 views
BubbleChart Text Tooltip's
Is it possible to display "name" in the tooltip? It won't chart the full dataset, so I can't make a custom labeling function that takes it in.
...
9
votes
1answer
100 views
DateList not using current year when a year is not specified
According to the documentation when using DateList but not giving it a year it should use the current year. It is not doing that for me. Instead it uses 1900. ...
11
votes
2answers
287 views
backward compatibility
When producing or enhancing code, it is tempting to use recent new primitives of Mathematica introduced in version 7 and 8, but for library code or in preparation or future version change in ...
10
votes
1answer
170 views
Issue with PathGraph
I am having a strange issue with PathGraph. Executing
PathGraph[{a, b, c}]
or ...
6
votes
1answer
147 views
DistributeDefinitions not working for compiled functions
This is fixed in Mathematica 9.0.0.
I'm having trouble with parallel evaluation of compiled functions. Here is a simple example illustrating the problem:
...
14
votes
1answer
214 views
Why does LogLinearPlot sample its argument outside the specified domain?
I experience a weird bug in the function LogLinearPlot. If the input is an interpolation function, such as the one created like this,
...
5
votes
3answers
206 views
Customize startup
Is there a way to personalize the startup?
I want, for example, that mathematica starts Maximized (not slightly-less-than-maximized as it usually does) with a notebook (also maximized) with a zoom of ...
13
votes
2answers
366 views
Command Completion
Note: As of version 9, this functionality is available and works out of the box.
I've a few questions about Command Completion in Mathematica. I recently discovered this feature, and it's really ...
2
votes
0answers
183 views
Front-end glitch when interacting with dynamic content
This is now bugging me too much to ignore it anymore. When I interact with a notebook that has dynamic content, for example moving a slider, Mathematica regularly brings other open notebook windows to ...
14
votes
4answers
869 views
Printing exported PDF graphics fails (version 8)
When I export even simple graphics, say, a DateListPlot to PDF under Windows, it refuses to print on any of the printers at work.
Acrobat (Reader X) throws three ...
4
votes
1answer
197 views
What changes in Dynamic have occurred from Mathematica 7 to Mathematica 8 that might induce incompatibilities?
I have a function that outputs a Manipulate (say
FAnimated[params_]:= Manipulate[F[params,t], {Time, Animator[t]}]
where F ...
4
votes
2answers
509 views
Wavelet Packet Transform in Mathematica 7 and 8
For finding location of spikes in a time series I used to transform the data into wavelet space using
DiscreteWaveletPacketTransform [ data, filter, 0]
and then ...
2
votes
1answer
140 views
VertexLabelStyle not found in Mathematica 8.0.0.0
I tried to use VertexLabelStyle, but seemed not recognized in my system with version number 8.0.0.0. Is this expected or I have missed something? From the online ...
4
votes
2answers
132 views
RunScheduledTask didn't execute itself the first time, why?
I have a problem with RunScheduledTask (new in Mathematica 8).
A task that I usually need to do is to set a cron to start at a specific time and repeat itself at the same time every day (or the same ...
4
votes
0answers
155 views
NullSpace[_, Method->“OneStepRowReduction”] is sometimes wrong; how can I work out when this happens?
(This is on MMA 7.0.1.0 on OS X)
I've just found a large matrix m for which NullSpace[m] and ...
