All Questions

189 views

Why rule does not work if Flat attribute?

The following works: ...
145 views

Apply rule only if applicable? Check rule applicability? Custom unapplicable rule?

How to avoid recursion in the following example? ...
341 views

Why does the mean in my coin tossing simulation not approach 1/2?

I simulate a simple experiment, a coin flip. What I do is accumulate the mean of the results up to the i-th experiment. What I can't figure out is why the computed means do not asymptotically approach ...
210 views

Convert boolean test function to pattern?

What is a "reverse" to MatchQ? MatchQ converts pattern into boolean function. So how to convert back? Suppose I want to use ...
161 views

Custom attributes?

Is it possible to assign custom attributes to symbols and check them later? SetAttributes[a, b] says ...
337 views

Complex Region using Presentations Package

Just purchased the Presentations package. First sketched this region: ...
210 views

FindShortestPath with negative weights isn't working

I have the following functions defined: ...
144 views

When using the default configuration of the Lightweight Grid Manager, anyone connected to the same internal network where the grid severs are can launch kernels on the grid. What possibilities are ...
447 views

How can I solve an exponential inequality in Mathematica?

I would like to solve the equation: A Exp[m t + s Sqrt[t] x - 1/2 s^2 t] >= K with respect to x (which is in the exponent) ...
171 views

Programmatically writing to a notebook in TraditionalForm

I'm trying to get a Cell to appear in TraditionalForm when using NotebookWrite. Here is the closest I can get: ...
39 views

How do I replace a variable with the answer from a solve function in the form k-> number + variables? [duplicate]

Possible Duplicate: Using the result of Solve in subsequent calculations extract values from replacement list I am trying to define a variable (k1) as ...
756 views

How to get the real PlotRange using AbsoluteOptions?

The problem in general involves the unreliable behaviour of AbsoluteOptions when option values are implicitly specified (e.g. ...
587 views

Is the source code available for examples in the “Mathematica Cookbook” by Sal Mangano?

I looked around a bit and didn't seem to find it. Not as obvious as Wrox books make it, for example. I came across a pdf of the book online [I paid for the paperback] but pasting the code from the ...
227 views

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311 views

How to plot a log log plot of the error

Suppose I have a function $$f(x) = \frac{1}{1+e^x}$$ I can use the function Series[] to generate a series expansion of $f$ as follows ...
705 views

Value of $BaseDirectory within Ant script? I'm using an ant script to install my application from the Workbench (as suggested in this answer). In past I've used two ways of specifying the destination for the build: Hard-coded directory, like ... 1answer 398 views Accessing data on local machine from remote kernel I have a remote kernel on a server that I would like to use to process some data. The connection works, i.e, I'm able to use the local front end and the remote kernel. However, I cannot figure out how ... 1answer 2k views Using Physical Constants in V9 How is one supposed to work with physical constants in Mathematica V9? When I first open Mathematica, physical constants such as SpeedOfLight are not recognized. If ... 3answers 255 views Making data persistent, as in xmgrace I've been using xmgrace for quite a long time as my favorite solution for scientific data manipulation and plotting. These data often come from home-made fortran programs, in the form of, e.g., a ... 1answer 379 views Label area on plot I created the following plot using Mathematica: ... 1answer 109 views How to substitute the Skip function in special cases? ... 1answer 159 views FunctionTreeForm I'd like to implement a function FunctionTreeForm which takes an arbitrary complex function and renders all the captionable subfunctions in a TreeForm. Explanation If we take e.g. a function: ... 2answers 812 views Global variable initialization in packages Is it a good idea to Initialize variables globally inside a package ? will they be local by default to that package ? 1answer 207 views Computing derivatives of a moment generating function Dear Mathematica users, I'm trying to compute higher order derivatives of a moment generating function and then evalutate them in 0 (in order to get some moment conditions for a GMM estimation). ... 1answer 757 views Using a compiled function inside NIntegrate gives “CompiledFunction::cfsa” message The following function is defined for Real input: FFc = Compile[{{x, _Real}, {EF, _Real}},If[x > EF, 0., If[x == EF, 0.5, 1.]]] FFc is now used in the ... 3answers 233 views How could I implement the equivalent of NextPrime I would like to know what an implementation of the function NextPrime would look like if it were implemented in Mathematica's core language. 2answers 525 views How can I draw a picture like this? [closed] How can I draw a picture like the following using Mathematica's graphics primitives? 2answers 320 views Deleting Print results While playing around with$Pre and Post I created this very annoying piece of code: ... 1answer 158 views Representation of product with exclusions Is there a nice way to define output formatting for my expression, a product from n = k to j with ... 3answers 190 views How to systematically classify Mathematica expressions? How to systematically classify Mathematica expressions? I can think of using Head[], Depth[], ... 2answers 270 views Misaligned DensityHistogram, DistributionAxes & PlotRange data = RandomReal[NormalDistribution[0.5, 0.1], {10000, 2}]; DensityHistogram[data, PlotRange -> 1, Method -> {"DistributionAxes" -> "Histogram"}] The ... 2answers 153 views CompiledFunction crashes kernel This crashes my kernel ... 1answer 1k views How to work around Mathematica hanging when showing a large SparseArray? Note: This is fixed in 9.0.1. In Mathematica 9, if I display any large SparseArray object in the default way (which looks something like ... 2answers 2k views How to study asymptotic behavior, built-in functions My question is as follows. Suppose we have a functionf(r)$and we want to study its asymptotic behavior at infinity ($r\rightarrow \infty$). For example, the function may reduce to$-\frac{a}{r}$or ... 1answer 161 views Spacer and Text in Graphics going Awry (in Mathematica 7) Use of a vertical Spacer in justified text inside a graphic isn't working as required. The result in the green box looks right, but when this is placed in a ... 5answers 570 views How to save Manipulate bookmarks permanently? I would like to save current Manipulate parameter values to load them again later. Bookmarks (previously discussed here and here) work fine until the cell is ... 1answer 861 views How to save a GraphicsRow output? I need to save the result of GraphicsRow command as a pdf or jpg file. Something like GraphicsRow[{plt1,plt2,plt3}] -> pdf. On clicking on the image there is ... 1answer 441 views How to colorize a rectangle with a given color function? I want to set color to a rectangle (in fact a line) that lies on (0,0) and (1,0), and the color function is given by$u(x,t)=t(x-x^2), 0\leq t\leq1$. Since, this$u(x,t)$act as temperature at the ... 1answer 275 views How can I fit a matrix function with multiple variables to given eigenvalues? I have a 5x5 matrix function H[kx] ... 1answer 157 views Manipulate code creates error messages when file is opened When I open the file containing the following code I get a series of error messages. Once I evaluate the cell with the code the error messages disappear. What is Mathematica doing when it opens a ... 2answers 374 views Generating stripes on a polygon I want to create a Graphics3D polygon that has stripes on it. My code is ... 0answers 663 views ParametricNDSolveValue or NDSolve + fitting I have been trying to find the value for the parameter kestim that yields the best fit of a model to some data points. datac has ... 1answer 119 views Why can't an Import[] change$Path?

Does anyone know why Import["http://**server**/file.m"] can't make a change to \$Path? It seems like ...
911 views

How to specify default style in Mathematica 9

In Mathematica 8, I can use GraphicsBoxOptions->{DefaultBaseStyle->{"Graphics", FontFamily -> "Helvetica", FontSize -> 14}} to specify the default font ...
169 views

How can I get Mathematica to simplify my expression?

4.*^-12 Sqrt[3.0254210421890627*^22 - 6.25*^22 T6^2] The above expression is equal to Sqrt[0.48406736675024997 - T6^2] ...
126 views

Images in package Not visible

I want to make a package where some variables are initialized to images. but when i save the package, all images are in the form of ImageData that are very long. ...
634 views

Why does Simplify ignore an assumption?

Here is the example: Simplify[x + y, x + y == a] Simplify[x + y, x + y == 5] Mathematica 9 output: x+y 5 I expect the ...
164 views

Why are the elements of plots separated in exported PDFs?

When I export a plot to a PDF with something like Export["test.pdf", Plot[Sin[x], {x, 0, 2 Pi}], "PDF"] I get a file in which the axes have been separated from ...