2
votes
2answers
636 views

Area or NIntegrate curves defined by points?

Is there a convenient method to compute the AUC (Area Under the Curve) metric that quantifies a Receiver Operating Characteristic (ROC) like shown here? The data used to build the ROC are just ...
3
votes
1answer
4k views

Mathematica code for Bifurcation Diagram

At the moment I am trying to construct a bifurcation diagram of the iterative function $f(x)=$ $ax-1.1975x^3$. I've scoured the internet for pre-made bifurcation diagrams and found many (mostly of the ...
3
votes
0answers
127 views

How to hide inline Cells

By giving a cell the simple option CellOpen -> False, it can be hidden from view. But for inline cells (cell within a cell) this does not work. An option ...
6
votes
1answer
136 views

What exactly does GenerateConditions do?

Consider for example this strange behavior: Integrate[1/x, {x, 0, Infinity}, GenerateConditions -> False] (*0*) I'd also like to know the difference between ...
12
votes
2answers
399 views

Preventing Numerical value from being evaluated

I have searched stackoverflow (and comparable pages) for quite a while now (got redirected from there to this specialized stack), and I surrender. I am trying to evaluate an expression that is small ...
1
vote
1answer
298 views

Making a screen icon by Mathematica

Is it possible to make within Mathematica an image file to be used as a screen icon? Could you kindly give an example?
2
votes
2answers
306 views

How can I overlap image on Graphics3D at a specific position?

I make a Polygon with size of {width=0,length=50,height=30}; I want to overlap Image on ...
0
votes
2answers
101 views

How to evaluate the sum using values from the data being input

I have a problem in evaluating a sum using values from data I input. Suppose I have data = {1, 3, 5, 6, 8} If I want to evaluate the sum of my data (1+3+5+6+8), I ...
4
votes
2answers
162 views

LevinRule and SphericalBessels

I'm currently looking at a simplified problem that approximates another problem I'm looking into. In this simplified problem I at least have an analytic integrand and can easily provide all info on ...
5
votes
1answer
614 views

How do I reverse the axis in ParametricPlot?

In astronomy, right ascension is usually plotted with positive values that increase from right to left. I have seen discussions of successful and unsuccessful attempts to reverse the order of an axis ...
5
votes
1answer
1k views

Combine multiple PDF files into one document

I have multiple single page PDFs I'd like to join together into a single file. (Obviously I mean the file format and not the probability distributions here!) I'm aware of free online services such as ...
4
votes
1answer
209 views

Cursor Position / Insertion Point

Is there a way to access (or even set) the cursor position in a Notebook? (By Cursor I refer to the keyboard input postion, or "Insertion Point". For the Mouse we have ...
8
votes
2answers
485 views

How does Mathematica decide that Log[2,8] is integer?

At school we learned that $\log_b(x)=\log(x)/\log(b)$, which is implemented in Mathematica as Log[b, x], but the results are different. ...
2
votes
1answer
227 views

How to generate a formula of a graph with three key points

I have three key points on a graph. How do I find out what the formula for this graph would be? The points are: (3,0) (5,2) (7,6). It is known that the graph will be a quadratic. Thanks
3
votes
0answers
873 views

Solving a system of nonlinear equations self-consistently

I am trying to solve a set of three non-linear equations in Mathematica. I need help with them. The Mathematica code (in plain text format) is attached below. If you copy & paste the code below ...
2
votes
1answer
244 views

Changing some stuff to Kruskal's Algorithm

I'm trying to modify this algorithm: http://demonstrations.wolfram.com/ConnectingTownsUsingKruskalsAlgorithm/ The thing is that I want to receive a Graph (declared outside, with all its vertex, edges ...
7
votes
1answer
364 views

How can I use “Save as (html)” and still render code as text?

I use notebook "Save as ... (html)" to convert my .nb to web. Formulas and plots get converted to images, which is fine. But code (input cells) get converted too into images. I would like people to be ...
0
votes
1answer
293 views

NDSolve event handler Question [closed]

I'm trying to plot a ball falling, hitting the ground and coming back up. without air friction, the equations for the system would be ...
11
votes
5answers
891 views

How can I get exactly 5 logarithmic divisions of an interval?

I'd like to get exactly 5 divisions from x to y on a log scale. Can FindDivisions do this?
2
votes
4answers
589 views

Hue shade colours

Looking at the plot below, how can I know what colours made the Hue shade? ...
5
votes
1answer
271 views

“Masking” an InputField

In building an assignment for my class, I would like set up an InputField, where they will enter a function. I was wondering if there was a way to "continuously" check if their function is being ...
4
votes
1answer
224 views

How can I set the axis for ScalingFunction in a BarChart?

Why is the scaling function being applied to the wrong axis? Here, the log ticks are on the Y axis, but they should be on the X axis: ...
2
votes
1answer
201 views

Why are my FrameTicks not working on ArrayPlot?

For some reason the ticks don't work on this: ...
2
votes
2answers
519 views

No result from DSolve

I don't get any answer when I evaluate the following expression: ...
2
votes
1answer
132 views

Specifying form in MemberQ

This seems like a very simple question, the answer to which should be obvious to me. So I won't be offended if this question is closed. But I'm having trouble figuring out the answer. I would ...
5
votes
4answers
518 views

How to transform the result of this integral into powers of $\sin\,x$?

I want to calculate the integral $I = \displaystyle\int{\cos ^5 x\, \mathrm dx}$. Using the variable $t = \sin x$, I get $$I = \sin x - \frac{2}{3}\sin^3 x + \frac{1}{5}\sin^5 x + C.$$ With ...
0
votes
0answers
52 views

Custom Magnification Setting [duplicate]

Possible Duplicate: In Mathematica 7 for Windows, is it possible to use custom GUI magnifications? I am able to use a custom Magnification by setting ...
8
votes
2answers
472 views

Alternative Math Font

Are there other fonts that can be used for mathematical symbols? I have noticed, that choosing another font (via Stylesheet) does not change the math font (e.g. for greek symbols). Symbols will just ...
4
votes
2answers
163 views

How to set the timeout of the preemptive link?

I apologize if this is a RTFM question, but I couldn't find this in the docs. How can I set the timeout of the preemptive link? For example: ...
21
votes
5answers
2k views

Making fractals with Mathematica

I recently saw this post on math.stackexchange and was curious as to how to generate the image in Mathematica. I tried the following naive approach; however, it is extremely slow. ...
0
votes
1answer
149 views

How to rotate Graphics3D into CDF? [closed]

I make Graphics3D with Polygons, before deploying then to CDF; In my notebook, it rotates ...
2
votes
0answers
92 views

Plot with Legends and Markers [duplicate]

Possible Duplicate: Creating legends for plots with multiple lines? I must say I have seen a couple of similar questions but they were not addressing my specific problem. Level one: I'm ...
10
votes
1answer
394 views

ListPlot filling not appearing when point is out of range

In a non-joined ListPlot one can specify that a filling line is shown for each point: ...
4
votes
2answers
136 views

Sorting list with variable

I want to sort (or sortby) the list. List contains uninitialized variable m and I can assume that m is a Natural number that is much larger then any constant. ...
1
vote
1answer
416 views

Using 'Reduce' to solve a set of inequalities, specified by a list

I have a two lists $LHS$ and $RHS$, both of size $n$. I want to solve a system of inequalities of the form: $$LHS[1] \leq RHS[1]$$ $$LHS[2] \leq RHS[2]$$ $$LHS[3] \leq RHS[3]$$ $$\vdots$$ ...
2
votes
1answer
833 views

FindMaxValue and FindMaximum - how to find GLOBAL maximum and not just LOCAL maximum

I will not be able to provide a simple minimum working example here as this seems to be very specific. I have an interpolating function which I substituted into a PDE and then plot said PDE at a ...
13
votes
3answers
1k views

Clustered and Grouped Bar Chart in Mathematica v8.0

How would I create a clustered and grouped bar chart that looks like this (which was painstakingly created using Excel)? I have seen examples for Mathematica v6.0 but none for Mathematica v8.0. The ...
2
votes
1answer
318 views

Vector Analysis: Why are the Grad, Laplacian and Div being evaluated to zero

For the non linear partial differential equation below, why are the Gradient, Laplacian and Divergence being evaluated to zero despite using the VectorAnalysis ...
1
vote
1answer
2k 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 ...
8
votes
1answer
738 views

How to speed up Minimum Spanning Tree algorithm?

How to speed up MST algorithm? I work with graphs and I have adopted Prim's algorithm for my needs, from here. The graphs which I use are very dense (number of vertexes: $V=500$ and every vertex is ...
2
votes
1answer
125 views

Generating continuous products or sum

This is kind of a continuation of this question. I want to automate these 2 steps on Mathematica once I give an integer $N$. generate a list of variables $\{a_i\}_{i=1}^{i=N}$ then for some ...
6
votes
3answers
957 views

Strategies to solve an oscillatory integrand only known numerically

I have an integrand that looks like this: the details of computation are complicated but I only know the integrand numerically (I use NDSolve to solve second ...
2
votes
1answer
198 views

Clearing distributed definitions from remote kernels

The documentation shows the following example to "Remove a distributed definition..." Oh, course this doesn't work without redefining the function prior to re distributing the definition. The ...
2
votes
2answers
822 views

Generating a vector of dummy variables

So I'm the situation of needing analytical solutions to a family of equations of the form Ax=b, where A is an nxn matrix. I've written a function that does what I want, but I'm currently using a bit ...
12
votes
4answers
1k views

Reshape vectors exactly like in MATLAB

This gives a 64×1 column vector in Mathematica: ...
4
votes
1answer
236 views

cannot open WSMLink

I'm evaluating Wolfram SystemModeler and I want to explore its capabilities together with Mathematica. Unfortunately, I don't manage to get WSMLink working. In the notebook I'm using I typed ...
4
votes
2answers
338 views

Custom (physics) dictionary for mathematica (used for word-processing, spell checking)

Is there a dictonary available that contains physics slang like spinor, vacua, gauge etc.?? How would one integrate such a file (or a simple text file containing the words) into the front-end without ...
0
votes
3answers
801 views

Examples of (well coded) packages using custom notation

Which packages do you know of, that have the following properties: using custom notation (for input AND output would be preferable) well coded & designed (from your subjective perspective!)
8
votes
1answer
368 views

Enhanced “Complete Selection” (dynamic autocomplete) for Text input?

The autocomplete ("Complete Selection") feature Ctrl-K (or F2 on Windows) works fine for functions and code input. Is there a way to enhance it for text input? Today’s standard (see e.g. OpenOffice ...
41
votes
1answer
2k views

Measuring fractal dimension of natural objects from digital images

This is a useful topic. A college physics lab, medical diagnostics, urban growth, etc. - there is a lot of applications. On this site by Paul Bourke about Google Earth fractals we can get a high ...

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