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7
votes
1answer
3k views

Automatically dealing with “disable dynamic updating”

I'm programmatically creating notebooks containing dynamic content. When a new notebook is being created, a window pops up: I then manually click on "Continue" and it will create the notebook. The ...
5
votes
2answers
359 views

Using absolute locator coordinates in Manipulate

In this simplified code below, I'd like to display two plots within Manipulate, and use the Locator controltype to set the value ...
0
votes
2answers
760 views

How combine pure functions of several slots? [duplicate]

How can one define in a functional way a 1st-order linear differential operator involving several independent variables that can then be applied to a function of that many variables? Consider an ...
4
votes
2answers
241 views

Lost and found Tooltip in ListPlots

I came upon a strange Tooltip behavior in ListPlot and ListLogPlot. Consider the following ...
3
votes
3answers
863 views

FrameLabel and OverTilde

What is the problem with this expression inside ListPrint? OverTilde generates here a mess: ...
-3
votes
1answer
264 views

How to use all the kernels efficiently

We build a project with Java and Mathematica technologies. For this project we have written a bunch of functions in Mathematica and integrated some functions in one ...
4
votes
1answer
555 views

Prevent mathematica from simplifying

How can i prevent Mathematica from automatically simplifying the expression Sqrt[a/b]? In case a=1 and ...
0
votes
0answers
97 views

Master Document [duplicate]

I'm wandering is there Master document concept in Mathematica so that the counter will be counted sequencially in master document. Mean file in child document, the counter follow from master document. ...
-2
votes
1answer
113 views

Calculations in sequence

I have a this calculation, as you can see it is doing a calculation on each list, from list 1 to list 4 of the datafile. My problem is that using Mapthread to do this calculation does not work because ...
7
votes
1answer
188 views

Need a generalization of RootApproximant to recognize linear combinations over algebraic numbers

RootApproximant does a very good job when I need to recognize an algebraic number and when enough of its digits are known (or even when an unlimited number of ...
2
votes
1answer
195 views

Elegant transformation of various rules to strings, {f[z_] -> y} becomes “f = @(z) y”

Assume that I have some function for transformation mathematica expressions to strings. For simplicity, just assume it is an identity: ...
20
votes
2answers
1k views

Is there a Mathematica barcode reader?

Is there a Mathematica barcode image reader (much like TextRecognize) that allows the user to enter an image of a barcode and then read it to get an output string?
5
votes
1answer
204 views

Is is possible to use regular expressions in the search and replace diaglog?

I find myself wanting to be able to do regular expression search and replaces in the Mathematica gui over and over again. Using a regex capable editor (such as vim), I could do something like: ...
3
votes
1answer
193 views

Handling of non-file URI

According to the manual, Hyperlink “represents a hyperlink that jumps to the specified URI when clicked”. OneNote produces hyperlinks that begin with onenote://. In Mathematica, creating a hyperlink ...
1
vote
1answer
157 views

Creating a Dynamic MSSQL connection

Hello i am trying to create a notebook that automatically connects to a database on MSSQL server and would then query this to create a sort of personal report. I have connected to this database and ...
2
votes
1answer
164 views

Cell format for screen headers

If one picks the menu option Format->Edit Stylesheet and then one opens the "Default.nb" link, the newly opened notebook has a header that reads "Deafult.nb" style definitions. In one navigates down ...
3
votes
1answer
346 views

How do you put a plot inside a popupmenu that is inside another popupmenu?

I have the next code ...
5
votes
1answer
2k views

How to scale Histogram counts with the value of bin center?

I am analyzing some variates from a steeply falling power-law distribution (approximately with a power index -4) using Histogram[data, Automatic, "PDF"] While ...
4
votes
3answers
1k views

Image3D and Graphics3D

also I guess that the topic was tackled in Combining Image3D and Graphics3D. My question is quite similar: How do I match the coordinate Systems of Graphics3D and Image3D? Here some code: ...
1
vote
3answers
988 views

TrueQ - Test of inequality [duplicate]

I want to look if a term is <0,>0 or ==0. What is wrong when I write ...
3
votes
1answer
175 views

What is the syntax to combine conditions and options? [duplicate]

How can a condition and an option be written on the RHS of a function? I.e. ...
3
votes
1answer
322 views

Is there a way to simplify this replacement rule

I have a rather big expression which contains many sums of form q x + w y. I know that y is much smaller than ...
2
votes
1answer
2k views

How to solve a system of integral equations?

I have a system of two integral equations ...
1
vote
1answer
175 views

How do I generate arbitrarily many integration bounds? [duplicate]

I have a multiple integral of the following form: $$\int_{-\infty}^\infty \cdots \int_{-\infty}^\infty \exp(-\sum_{i,j=0}^n x_i A_{ij} x_j) dx_1 \cdots dx_n $$ Here, $A$ is a square matrix and $x_1 \...
0
votes
1answer
147 views

Problem with List Dimension Outer Map [duplicate]

I am currently handling a big list which has the following dimension: {6, 3, 4, 2, 2, 1, 8} where the last number 8 represent a ...
15
votes
1answer
880 views

How can I define a Listable function only apply to a vector?

Consider the function f which should behave as f[{{1, 2}, {3, 4}, {5, 6, 7}}] ...
1
vote
2answers
229 views

Using mathematical notation

Is it possible to write this function in mathematica exactly as shown, and then run the expression on a dataset? Please note I know that there are several other ways to do this. I am only interested ...
14
votes
1answer
6k views

Extract matrix from a system of linear equations [duplicate]

I have a big system of linear equations $f_i(x_1,...x_n)$ with $n$ variables and $n$ equations. I want to extract the matrix $M$ where $\vec{f}(\vec{x})=M\vec{x}$. For example if I have $$ f_1(x) = x ...
0
votes
1answer
364 views

Logic behind Flatten and Append to in Module

I have a list(kicks), and a function(fix). I am aware of the problem using Loop and Append or AppendTo. My question is why does the Flatten produce the desired output. List: ...
4
votes
2answers
729 views

Force Mathematica not to reduce a fraction

I am interested in a function which would stop Mathematica reducing fraction. If my input is 50/100, Mathematica outputs 1/2, I ...
7
votes
2answers
1k views

How to automatically get rid of trig functions in an expression?

I have a large expression containing many terms like this: Sin[1/2 ArcTan[(2 Log[5])/(Log[5]^2 - 2)]] where a trig function is invoked on a rational multiple of ...
14
votes
2answers
437 views

Pattern to match L, but not L[_]

I have an expression where I want to replace L but not L[_] For example, the following doesn't work and ...
1
vote
1answer
488 views

TreeForm display with nested lists as nodes

If i have a nested list representing nodes in a binary tree, {3, {2, {1, None, None}, None}, None}, what is the easiest way to show the hierarchy, without all the ...
3
votes
1answer
888 views

How does FindInstance work?

I was asked a question one day: find an integer n such that the first five digits of 5*7^n is 12345. It's very nice that I can quickly write code like this: ...
3
votes
0answers
443 views

How to compute the Lovász number for the given graph in Mathematica?

Here is a graph whose adjacency matrix is ...
3
votes
1answer
179 views

obtaining real roots of negative numbers in a long expression [duplicate]

I have a complicated symbolic expression which contains many terms like $(a/(a-2))^{1/m}$, where $a/(a-2)$ could be positive or negative after replacement. I only need the real root after ...
1
vote
2answers
855 views

Approximate solution to system of polynomial equations

I'd like to solve approximately the following system of equations for $a_1$, $a_2$, $\alpha_1$ and $\alpha_2$ all real and nonzero: $a_1(1+4\alpha_2)^3+8a_2(1+4\alpha_1)^2+\frac{\sqrt{\pi}}{64}(1+4\...
13
votes
2answers
2k views

How to position text labels automatically to not overlap other graphics elements?

I was plotting reciprocal frame projection using Locators for a point to be expressed in terms of both the original basis (also specified with ...
4
votes
3answers
270 views

Variable partitioning of the data in the form of “list of lists”

I am looking for a way for variable partitioning of the data in the form of a "list of lists" for interpolating the imported data from excel. The data looks like: ...
3
votes
1answer
383 views

How to use ChoiceDialog or PopupMenu with ClickPane

What I am trying to do is modify the standard ClickPane example where a list of points (pts) is added to with each click, in the ...
10
votes
2answers
2k views

How could I generate words starting with P,h,D?

A friend of mine is a PhD candidate and posted a picture on Facebook with funny words starting with 'p', 'h' and 'd' like "Please hire. Desperate" or "Permanent head Damage". I thought I could try and ...
10
votes
2answers
2k views

Slice through Graphics3D

is there any possibility to slice through a Graphics3D object? At the end I would like to have a stack of images slicing , e.g. $n$ times in $z$-direction: $((x,y,z_{0}), (x,y,z_{1}),…,(x,y,z_{n}))$ ...
0
votes
1answer
80 views

LMS distance from a point to an InterpolatingFunction

I have a short script to NDSolve a second-order nonlinear BVP, which as its output produces an InterpolatingFunction object. I ...
7
votes
1answer
2k views

Getting clearer StreamPlot output

When I do a StreamPlotof a rather complicated pair of differential equations, it loses some details. For example: ...
4
votes
1answer
258 views

Levels and slots

I am struggling with levels and #, if I understand this I think I will be able to grasp the entire concept. ...
2
votes
1answer
6k views

Direct sum of matrices [duplicate]

Is there a simple way (perhaps even a built-in function) that allows one to compute the direct sum of two square matrices?
27
votes
5answers
1k views

Compiling ColorFunction for faster complex phase-amplitude plots

I have gotten into the habit of plotting complex-valued functions on a plane using a color-function along the lines of Function[{z}, Hue[Arg[z]/(2 π), 1, Abs[z]]]. ...
9
votes
1answer
383 views

Raise systemwide keypress event

Is there a way to raise system-wide "keypress" events programmatically from within Mathematica? Say "Ctrl+C" or "Ctrl+V", which all other programs can recognize? This is an attempt to gain simple ...
5
votes
1answer
586 views

Why is $ProcessorCount different than the selected number of cores in PBS?

By using ParallelTable and submitting my Mathematica code to a cluster, I noticed that it was enhancing the speed even when I selected a single core in a single ...
1
vote
1answer
202 views

How can I replace UndirectedEdges to pairs of bi-directional DirectedEdge in a Graph?

How can I have pair of edges between nodes in this kind of graphs? ...

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