# All Questions

450 views

### Apply color function to matrix plot

I want to apply the following color rules to a large table of numbers. I have extracted a part of the table to use as an example. I would like to assign 5 different colors to 5 different ranges of ...
59 views

### Creating text using Table [closed]

I have a really trivial question. I want to create a table containing the text "this number = k" where k is the value of the iterator in the Table function. I tried ...
91 views

### Dynamic Syntax - Evaluate AppendTo as the second argument

I am attempting to Append a new value into my list paramMonitor whenever the value for B ...
163 views

### Simple subtraction question [duplicate]

I have two lists. a = {{2, 2}, {3, 3}, {4, 4}, {5, 5}}; b = {1, 1}; I want to subtract a from ...
58 views

### How to known exactly what color assign “TemperatureMap” to a particular value? [closed]

Usually ColorData["TemperatureMap"] is using to coloring graphs and show how near is any value to 0(Blue), 1(Red), or in the mean (White). The question is: How ...
560 views

### How to the take derivatives of a parametric function? [closed]

I have a parametric curve of the form $x(t)=2t^3+3t^2-12t,\ y(t)=2t^3+3t^2+1$ How do I take the derivative of that function in Mathematica? Is there a certain function I should use?
414 views

### How to copy a function by value?

I need to change a function symbol multiple times by assigning another symbol to it, but when I'm trying to do that the symbols overwrite each other. I'm assuming this is because the assignment is by ...
155 views

### NIntegrate - WorkingPrecision

I am trying to NIntegrate this expression. It is very close to zero, and so gives all possible types of errors. More precisely, ...
158 views

### NDSolve - sampling for result during the computation

I am using NDSolve for a Langevin dynamics problem. I want to the know long term behaviour of my system ($t>1$) but it has to be simulated with very small time steps ($dt\sim 10^{-9}$). An example ...
99 views

### Ordered indices of a multiple product or sum

Given a summation like $$\sum_{1 \leq i_1 < i_2 < \dotsc < i_k \leq n} f(i_1, i_2, \dotsc , i_k)$$ how can the lists of indices be enumerated? For example, if $n=4$ then the possible lists ...
55 views

### Using SetDelayed wih SQLExecute

I want to create a reusable line of code that I can send a column, table name and criteria to match using the WHERE clause. ...
163 views

### Expressing a joint distribution for use in ContourPlot

I have $$X_1=T + W$$ $$X_2=2 T + 3 W$$ where $$W \sim N(3,5) \,\text{;}\,\, T \sim N(1,2)$$ and $$P(X=X_1)=P(X=X_2)=\tfrac{1}{2}$$ which I have awkwardly expressed as ...
98 views

### What is “ (Dialog) Input [ ] := ” after evaluating a cell?

I have done a time-consuming run and calculation. After many hours ( about 7 hours!), the black color which shows that the cell is evaluating, turn into gray and a strange text appears like this : ...
310 views

### Riffle and Partition

At some point I noticed that I was using Riffle and Partition together a lot. I would do things like ...
164 views

### Prevent package from being opened in a notebook interface

I have a package which I need to deploy in a client's environment. It has proprietary code and solutions that I need to protect from prying eyes and inquisitive minds. The forum has discussed much ...
120 views

### Scope of variables within a Manipulate expression [duplicate]

I have a problem in defining the local variables. I have this code: ...
87 views

### How do I count a number of primes(say smaller than N) that does not contain 5?

Title says it all. How do I count a number of primes(say smaller than N) that does not contain 5?
75 views

### nested series expansion

I have to invert the following matrix in which the functions U[t,x,y,r] and K[t,x,y,r] and all their derivatives are "small"; ...
198 views

### Kronecker delta notation

Is there an easier way to enter KroneckerDelta[n,m] in Mathematica? When I use the notation $\delta_{n,m}$, it won't work.
98 views

### Plotting the solutions of a system of differential equations on a simplex

I want to solve and plot the solutions of the following system on the triangle simplex: x'[t] == x[t]*(2*x[t] - 2) y'[t] == y[t]*(2*x[t]) z'[t] == z[t]*(2*x[t]) ...
54 views

### Substituting a function in the output

I have to calculate the derivatives of the function K defined in the code: ...
74 views

### alignment of plots [closed]

I want to align my plots like I did with Gird[]. But you cracks here are using these short forms all the time. So, is there a way to achive this result in a better ...
100 views

### Is there a way to use pause in Manipulate?

Is there a way to do any similar to Do[Print["Iteration...", j]; Pause[1], {j, 1, 6}] with Manipulate? (to show the ...
120 views

### Is there a PrimeQ whose accuracy guarantee you can adjust?

Say I have a list of a million integers each with a million digits, and I want a crude sieve to see which have a chance at being prime. Mathematica has a PrimeQ function, which appears to be slow ...
118 views

### Given two samples, how does LocationTest select its AutomaticTest?

How does LocationTest select its "AutomaticTest" when testing two samples? Background: A previous post poses a similar question ...
1k views

### Detecting patterns of black and white stones on a 2D board

I'm writing a program to play a game of Pente, and I'm struggling with the following question: What's the best way to detect patterns on a two-dimensional board? For example, in Pente a pair of ...
108 views

### ListPlot, PlotMarker -> y value [duplicate]

at first sorry if this question is already answered. I would like to display y value as plot marker in listplot ...
595 views

### DSolve will not apply assumption m ∈ Integers

I am trying to solve a linear second order ODE using DSolve which involves an arbitrary integer m. ...
395 views

### Extracting financial indicator data from trading chart

How can the data of the directional movement index below be extracted from this chart? It seems to be embedded in some kind of dynamic module. ...
191 views

### How can I find a root of my transcendental equation near a certain point?

What function could I use to solve this equation for x: E^(-x^2) = 1 - Cos[x] I tried Solve, ...
253 views

### StringReplace, ReplaceAll and Rule interact in a bizarre way

I have the following pair of things: ClearAll[foo, labeledFoo]; labeledFoo = {"FooBarBazQuux", foo}; This works like you'd expect: ...
84 views

### How write this Function with many arguments? [duplicate]

F[x1_,x2_,...,x99_]:=expr How to write this Function in mathematica whithout complete write it?
158 views

### Solve a system of M equations without specifying M

This post has been edited heavily in response to the comments: my initial question was very confusing. I am trying to write my game-theoretic model in Wolfram Language. There is only one remaining ...
176 views

### How do I upload a graph as an adjacency list and find the betweenness centrality?

I have an undirected simple graph in a .txt file formatted as an adjacency list like this: 100 200 200 300 300 400 500 600 700 800 900 ... Every number is a node ...
144 views

### Append subscript to variable name [duplicate]

I'm importing equations from Word document and transforming them into input form. But subscripts look ugly. Is is possible to programmatically append subscript to variable name? e.g. ...
345 views

### Traces of products of Pauli matrices

Given a matrix $M$ of shape $2^L*2^L$, I would like to compute all the traces $\text{Tr}( M.(\sigma^{n_1}\otimes\sigma^{n_2}\otimes\ldots\otimes\sigma^{n_L}))$ for $n_1=1...4$, $n_2=1...4$, ..., ...
81 views

### How can I insert the current date in a text cell? [closed]

Ok I must be missing something. I have a section with the "last updated date" in a text cell, I'd like it to autoupdate. Is there a "insert current date" command hidden away in some menu?
80 views

### Optimizing evaluation time

I have the following code and it takes like foreeeeever to evaulate: ...
374 views

### How can i integrate over a set of data

i need to integrate over my data, which is denoted as {q, I},here I is the Intensity i need to obtain the form of the following integration( its not a numeric integration, because it contain x, next ...
26 views

### Minimizing roots of a transcendental equations [duplicate]

I'm trying to use the solution of FindRoot with parameters for further calculations. Annoyingly enough it always gives me trouble with replacing the parameters. As an example I'm attaching a simple ...
87 views

### Text with date, how to convert?

I use this script to recognise a date in a textfile and write the result in another file. ...
105 views

### Control which frontend session/kernel the Workbench gets attached to

(I am new to Workbench) I have 2 or 3 Mathematica frontend sessions open with a few of them running some long-running codes. When I try to open/edit a code in Workbench, I see that it sometimes it ...
79 views

### Selection of the position of the variable

I defined a function funloglogplot to make a loglogplot of a function (function1) depending on several variables ...
644 views

### How to combine more locations (GPS coordinates inside one city) with Google map?

I have a list of GPS coordinates.E.g. GPSList = {{47.680800, 17.626446}, {47.681078, 17.627283}, {47.682759, 17.631810}}; I would like to crate a Google Map ...
144 views

### Copy a variable to a specific kernel in Mathematica [closed]

I would like to copy some parameter from the main Kernel of Mathematica to the parallel kernels available. So I'm running now a command like: ...
82 views

### Define function that goes from one point to another parametrically

I have two points p1 and p2, and I want to get the parametric equation of a linear function that passes through those, but ranging from one point to another. For example, if I have 2 points {0,0} and ...
165 views

### How to set the color of plot legend independent of the plot itself

I have written the code below: ...
64 views

### How to Show the “TemperatureMap” using Manipulate? [closed]

How to show the "TemperatureMap" in Manipulate?. ONLY the image, without text "ColorData..." ...