# All Questions

10 views

### Optimization of recursive functions by using the //. operator

In some cases, recursion in Mathematica (without storing values) is not very efficient. For example, the recursive implementation of Fibonacci numbers (version which doesn't store the values) : ...
55 views

### Creating a function that uses another function as an argument

I'm new to Mathematica and found a couple questions that were the same as mine but they did not help as much. I'm trying to create a function that evaluates another function and uses that value. ...
35 views

### How to delete subsets quickly?

I have some data like this: ...
31 views

### Undocumented function SumOfSquaresReps

There is an interesting (and documented) number-theoretic function in MMA called PowersRepresentations[$n$, $k$, $p$]. It gives the distinct representations of the integer $n$ as a sum of $k$ ...
34 views

### Simples exercise using the function Cases (beginner question)

I'm having some trouble in the following exercise: Find which elements of the list are prime numbers or divisible by 3. list = Table[i^2 - 6 i - 1, {i, 0, 15}] ...
85 views

### Binomial Regression where n > 1

I am not well versed in Generalized Linear Models, but am trying to use this approach to model some discrete data. I have binomial data where the sample size for each observation is the same size, ...
324 views

### How can I mix the behaviors of StringReplace and ReplaceAll in a single rule?

I'm trying to take a list of the form { {"65 + 3 months", 75}, {"65 + 4 months", 75.1} }, and transform the string part to a number such as 65.25 or 65.333, ...
94 views

### Combination of interpolations doesn't work?

I have tables of function values f[i_] and g[i_] and I need to plot various combinations of the function and its derivatives ...
9 views

### VS c# NetLink - pictureBox - MathCommand

Has anyone experiance or a running example how to use within VS C# the NetLink.UI pictureBox to plot graphics, especially using the pictureBox - "MathCommand"
64 views

### My evaluation is taking a lot of time

I was evaluating the roots of a transcendental equation, when I noticed that Mathematica never finishes but stays in the running state. The following is the code that I was using: ...
6 views

### Programatically align text in the Front End

One can select a cell and using the Front End menu perform Format -> Text Alignment -> Align at 25% Other options are given as well. I have learned from Stack Exchange how to create a button and ...
212 views

### Time Zone Conversion

I use Mathematica to administer my share depots. The depots contain shares of many different time zones. I update the depot values several times a day. My problem is that Sidney, Australia, (it might ...
45 views

### Visualising a 1-(50,15,15) design

The problem I have is the visualisation of a $1-(50,15,15)$ design. That is a set of $50$ points and $50$ blocks (lines), so that each point is on $15$ lines, and each line contains $15$ points. My ...
88 views

### How to deduce the Ramanujan's summation of this series?

I have already asked a similar question about Ramanujan's summation in general but received no good answers. Now I am interested in this exact series: $$\sum _{n\ge1}^\Re (24 n + 12 n^2)$$
82 views

### Calculating expected value from paired values and weights

I'm very new to Mathematica. I just need a quick solution on how to multiply x with y when a data set is given as ...
45 views

### How to close all tagged input cells winout closing their output cells?

I have tagged certain Input cells I want to be closed during a presentation. I close them as follows: ...
204 views

### Labels strangely rendered in PDF

I'm new to Mathematica so I apologize if this is obvious to answer. Anyway, using the following code (most of it is extraneous, to make the plot look the way I want) I plotted the Morse potential, ...
9 views

### InteractiveTradingChart not working inside Dynamic

I would like to have an interactive trading chart that updates by changing the input stock. But anytime a dynamic is wrapped around the function, it doesn't manage to initialize. Is there any way to ...
39 views

### Remove color artifacts in overlay of several Graphics objects?

I am trying to create an animation with a graphic of an arm that can bend at the elbow. For this purpose I created the following two images: hand1 and hand2. I load the images with ...
5k views

### Finding all shortest paths between two vertices

The built-in FindShortestPath and GraphDistance functions find the shortest path between two particular vertices in a graph. I ...
78k views

### Where can I find examples of good Mathematica programming practice?

I consider myself a pretty good Mathematica programmer, but I'm always looking out for ways to either improve my way of doing things in Mathematica, or to see if there's something nifty that I haven't ...
16 views

### Decouple 3 simultaneous 2nd order ODEs (of 3 dependent variables)

I have three simultaneous ODEs with coupled dependent variables. I was wondering whether there's a way for Mathematica to decouple these equations (into three ODEs of a single dependent variable ...
102 views

### Combining lists to create points to plot with ListLinePlot [on hold]

I would like to make a ListLinePlot using these lists: ...
90 views

### Reduction of an Inequality in $\mathbb{C}$

Reduce[ Abs[-((4 p)/(-1 + Sqrt[1 + 4 p + 4 q])^2)] + Abs[-((4 q)/(-1 + Sqrt[1 + 4 p + 4 q])^2)] < 1 , Abs[p]] It is taking lot of time. It is running. Can ...
5 views

80 views

### How to partition a 2-D array properly?

Given that I have the following array lst = Array[Subscript[P, #1, #2] &, {5, 5}, {0, 0}] \$ \left( \begin{array}{ccccc} P_{0,0} & P_{0,1} & P_{0,2} ...
96 views

### How to properly generate messages from LibraryLink function?

I'm currently using WolframLibraryData::Message to generate messages from a library function, like this: ...
192 views

### How to write markdown with Mathematica?

Usually I typeset with Latex and Compute with Mathematica and then copy the outputs as Latex code and insert them in Latex, so I have to switch between Latex and Mathematica frequently. Thanks to the ...
66 views

### How to create a vertical (smooth) Histogram on the y-axis of a function graph for an uncertain x?

This is my first time posting a question in StackExchange. I have encountered a certain problem and I can't seem too find a solution. Just a word of caution, I am kind of an amateur when it comes to ...
64 views

### How to use the output we see of expression when this expression is inside Dynamic

Consider this example: Manipulate[status = Dynamic[If[a < b, Yes, No]], {a, 2}, {b, 5}] The output of this calculation is ...
120 views

### Different results with Plot option “Evaluated” in V9 and V10

Consider this example: Plot[Table[BesselJ[n, x], {n, 2}], {x, 0, 10}, PlotLegends -> {"n=1", "n=2"}, Evaluated -> True] The results in MMA v9 & V10 ...
116 views

### IntegerQ and Element Integers give different results in one case

f1[x_] := IntegerQ[x] f2[x_] := Element[x, Integers] Both functions give identical results in everything except for such case: ...
102 views

### Complement[] changes order of elements?

Consider this example: Complement[{a, y, c, d, e}, {a, c}, {d}] (*{e, y}*) However, I was expecting the result to be: ...
341 views

### How to find valleys of data using new function in V10 PeakDetect

One of the great new function in V10 is PeakDetect. It can detect peaks according to desired sharpness as shown in this example: ...
830 views

### How to find all data points within closed curve

I want to find all data points inside curve as given below: ...
64 views

### Removing an ordered pair from a list of ordered pairs according to a certain criterion

I have a list of ordered pairs produced by evaluating {IsotopeData["Thorium226", "ExcitedStateEnergies"], IsotopeData["Thorium226", "ExcitedStateSpins"]} I'm ...
204 views

### Built in function without Attributes Listable works as if it has Attributes Listable

Can Built-in function works as if it has Attributes Listable even if it doesn't have that ...
295 views

### Creating “detached” plots

Is it possible to create detached interactive plots in Mathematica like those in Matlab, Jupyter (IPython), rather than inline ones? This is interactive GIF from Rodeo IDE for Python as an example, ...
42 views

### Part of longer code has an error - how can I debug?

Please can someone help me locate the problem? ...
20 views

### LUDecomposition does not give the expected results [duplicate]

Check this example: ...
67 views

### How to specify that Quiet should silence foo::shdw messages for ANY symbol foo?

I have some package code that does rather complex multi-context evaluation, and I know it's going to throw warnings about shadowed symbols. The shadowing isn't actually a problem. For the end-user's ...
57 views

### Color degrades when using Copy As Bitmap

I have discovered a problem that affects my use of Mathematica. When I use the menu command Edit > Copy As > Bitmap the colors in the copy are subtly degraded. To make this more apparent I copied ...
34 views

### Points on discriminant variety?

I am trying to find a way in Mathematica to compute points on discriminant variety for modest size systems, but I couldn't find one. The system is something like: ...
29 views

### Nested optimization (in a dynamic game) [on hold]

I have a dynamic game in two stages with two players. The solution of this game requires first to find the Nash equilibrium in stage 1 with correct expectations of the decisions taken at stage 2. At ...
33 views

I want to use mu own package. This is the procedure I take: 1) In Mathematica notebook I put the following code taken from code ...
47 views

### How to make a cell highlight on mouse down?

When a cell has WholeCellGroupOpener set to True, it becomes a clickable button that toggles its cell group open and closed. How can I make the cell change color ...