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2answers
172 views

Pattern match any member of a Context

Let's say I have four functions: x, y, Xx, and Xy. ...
1answer
3k views

How to extract metadata from an image of a business card?

I'm trying to digitize some documents, and I came across a very cool app called camscanner app which performs parallax transform and ocr very nicely, now I'm implementing it in mathematica... Given a ...
2answers
492 views

What are Controlling and Computing Processes?

My wolfram user portal claims that I have 2 controlling processes and 8 computing processes. Mousing over the question mark gives me some information, but I still don't fully understand what this ...
2answers
278 views

Problem with high parameter values in ParametricPlot

I tried to plot the following function as a Parametric Plot. When I include values for w up to 1 the plot looks fine, but I need this plot for values up to 100 or 1000. ...
1answer
1k views

2answers
17k views

Plotting the frequency spectrum of a data series using Fourier

testData = Table[N@Sin[500 x], {x, 0, 100}]; ListLinePlot[Abs[Fourier[testData]], PlotRange -> Full] Gives me Which I do not expect because the Fourier ...
2answers
817 views

How to interpret the FullForm of a SparseArray?

SparseArrays are atomic objects, but they do have a FullForm which reveals information about them. What is the meaning of the ...
4answers
1k views

Efficient circular buffer?

I wish to create an efficient circular buffer. That is, I wish to keep a fixed length list while appending a new value and dropping the oldest, repeatedly. As we know lists in Mathematica are ...
1answer
252 views

In a DynamicModule, is it possible to use multiple EventHandler declarations? [duplicate]

Possible Duplicate: Wrapping EventHandler by Table I am running Mathematica 7. However, I am new to using Dynamic, ...
3answers
206 views

How can I efficiently enter multiple instances of data?

I would like to plot the normal distribution for a population of human heights. My question is how can I input multiple frequencies for the same variable, without writing them out one by one. e.g. I ...
1answer
149 views

Error in setting matrix elements [duplicate]

Possible Duplicate: How to Set parts of indexed lists? For better organization of my code, sometime I use data objects in the form: ...
2answers
5k views

For example: ...
2answers
303 views

Why rule does not work if Flat attribute?

The following works: ...
1answer
214 views

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

How to avoid recursion in the following example? ...
1answer
448 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 ...
1answer
388 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 ...
1answer
498 views

Custom attributes?

Is it possible to assign custom attributes to symbols and check them later? SetAttributes[a, b] says ...
1answer
576 views

Complex Region using Presentations Package

Just purchased the Presentations package. First sketched this region: ...
2answers
259 views

FindShortestPath with negative weights isn't working

I have the following functions defined: ...
1answer
253 views

Restrict access to Lightweight Grid

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 ...
1answer
977 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) ...
2answers
376 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: ...
5answers
2k views

How to get the real PlotRange using AbsoluteOptions?

Bug persisting through version 12.0.0.0 The problem in general involves the unreliable behaviour of AbsoluteOptions when option values are implicitly specified (e....
1answer
1k 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 ...

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