# All Questions

1k views

### Band-pass filter an image

Ok so i have some HR-TEM images. In this technique fringes appear whereever a crystalline structure is present. This fringes are separated by a certain distance depending on the material, this is our ...
167 views

### Delay of events detection dependent of “MouseDown” position

Let's say we have a Rectangle with color which depends of CurrentValue["MouseOver"]: ...
345 views

### Labeling a three-dimensional plot

As the title says, I want to add some text in a three-dimensional plot, thus labeling specific parts of it. Here is the corresponding Mathematica code ...
96 views

Suppose that $A$ is an $n \times n$ matrix, and I have observed some entries of $A$, say, $A_S$ ($A$ restricted on $S$) for some subset $S$ in $\{1,...,n\} \times \{1,...,n\}$. I want to know if it's ...
1k views

### Log-log scale smooth histogram

How can I create a smooth histogram with a log-log scale? I can use Histogram[data, "Log", "LogCount"] to get a log-log histogram, or I can use ...
176 views

### Any way to speed up evaluation in an Animate?

I have a self-defined function which is fairly complicated and gives the analytical form. The result contains two independent variables. I use Animate to plot the ...
121 views

### Help with writing a polynomial series [duplicate]

I want to write and evaluate an expression something like Sum[x[i] Product[y[j], {j(!=i), 1, n}], {i, 1, n}] but with correct syntax, where n is a any number (...
280 views

### Plot complex path (essentially a 2D path) expressed in one real parameter

Consider a complex path expressed in one real parameter, such as $$f(\alpha)=\frac{1}{e^{i \alpha} + 1},$$ which is a Möbius transformation of the unit circle. I know I can expand it all out and use ...
305 views

### Mathematica: computing a difficult integral

I am trying to compute the following integral: Integrate[Exp[Sum[-((cw λ - b[i])^2/(2 σ^2)), {i, 1, n}]], {cw, 0, 1}] And currently Mathematica outputs ...
90 views

### Can I specify the style of plot for some element in discrete plot?

I am using discrete plot to plot a 1D array. But I want to plot some points specified by a span in one style (for example, in red) and the rest points in other style (e.g. in blue).
470 views

### Forcing Mathematica to use certain simplification rule

I'm trying to force Mathematica to use following transformation function ...
159 views

### Any way to reverse span and join two span in Mathematica?

I port a matlab code to mathematica. In the original matlab code, I use ":" to pick up the desired elements in a matrix. In mathematica, I find in the documentation that the span operator is ";;" (...
171 views

### How to embed graphic-element-specific metadata within a Graphics object?

One of the most crucial requirements for rich, interactive scientific graphics is being able to "annotate" individual graphic elements (e.g. the data points of a scatterplot, the individual curves in ...
2k views

### Implementation of smoothing splines function

I have some problems in writing a module for spline smoothing. Actually, I have been trying for about two weeks. My listing is here: ...
99 views

### Where does Documentation Center introduce the basics?

While helping a user who mistakenly thought that log rather than Log was the correct built-in function name, I included a gently-...
317 views

### how to export nested list

I have a ListPlot where I extract my data again using pts1 = Cases[(*I put my list plot here*), , x_Point :> First@x, Infinity]; which gives me the data as ...
3k views

### Keyboard shortcut to evaluate notebook

(If this is entirely trivial, although I couldn't find an answer as much as I searched the archives, I will delete the question.) How could I add a keyboard shortcut to evaluate the entire notebook ...
295 views

### Highlighting a single Period of a Trig Plot

How do I highlight a single period of a trig function say by using color and/or thickness when the graph itself extends further than just a single period? Thanks...Gregory Lane
102 views

### Elegant way to transform formula with sum into code

I have this formula, and many other which contains sum, I am perfectly able to do the computation over a list, however to do this I need to do it in several manual steps. Therefore, I wonder if there ...
372 views

### How to replace subscript symbols

I have an expression with subscripted variables. I would like to replace all those terms with other symbols. For example, $P_1 + P_2^3 \rightarrow P1 + P2^3$ I used the following code but it doesn't ...
2k views

### Solving a system of nonlinear coupled ODEs

I tried using NDSolve to solve the following system of equations: ...
982 views

### Plotting a piecewise parametric curve [duplicate]

I have no idea how to plot the following piecewise parametric curve in Mathematica; ...
91 views

### Generate higher dimensional box vectors

I'd like to generate integer vectors in $\{-M,-M+1,\dots,M\}^n$, where $M$ and $n$ are parameters. For a fixed $n$, say $n=3$ for instance, I only know I can use ...
150 views

### How to always display current section identifier (number, name) in notebook?

Because I find myself relocating frequently within a long notebook divided into sections, subsections, & subsubsections, I would like to display the identifying information for the section, etc. ...
663 views

### Elegantly adding two differently spaced lists of ordered pairs $(x, y)$

Suppose that I have two lists, list1 and list2, of ordered pairs $(x, y)$. The two lists are differently spaced in $x$; some ...
780 views

### Mixing Text and Formulas

I'm trying to do some typesetting in which I mix text with formulas. The Mathematica documentation has a section titled "Mixing Text and Formulas" which pretty ...
199 views

### NDSolve error when solving pde [closed]

I am trying to calculate speed of viscous fluid in a rotating hollow sphere. The sphere is rotating round z axis. The fluid is incompressible. I used Navier-Stockes equations. The only boundry ...
354 views

### Jumps in NDSolve results

I need to compute using NDSolve routine, some function $F(x)$, having two possible values $F_1(x)$ and $F_2(x)$ depending on whether the argument exceeds some ...
292 views

### How to partition a list into sublists in a similar way to Histogram

I have a list of list as below (I show part of it) ...
369 views

### Ranking a vector containing ties

How can I rank a vector such that the ties are replaced by their middle ranks. For example, {1, 2, 2, 3}. I want to rank this vector but the ties must be replaced ...
1k views

### Frequencies represented in a DFT list (Fourier[])

I have a sound sample (sample rate: 44100). When I have a list l with n successive elements from the sample, ...
106 views

### Missing some packages?

I am trying to use a program written by someone else. When I run the program, I am supposed to get a number as a result, however, what I got is some complicated result with "InterpolatingFunction" ...
241 views

### How to Use ProbabilityScalePlot with Censored Data?

I am trying to reproduce a ProbabilityScalePlot of censored data shown here (see Sample Analysis Plot). Here is my Mathematica code. First I deal with the uncensored case. ...
2k views

### Why does Mathematica order polynomial forms in reverse from traditional order?

I could very well be missing something obvious, but this has always bugged me with Mathematica and I don't know why it does it or how to fix it. If I enter any polynomial, say, x^2 + x - 1 for ...
8k views

### Filling Between Curves [duplicate]

I want to fill in the region between the curves. So far I have this: Plot[{x + 7, 9 - x^2}, {x, 0, 1.5}, Filling -> {1 -> {2}}] But I want something ...
1k 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 ...
215 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 ...
440 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 ...
183 views

### Lost and found Tooltip in ListPlots

I came upon a strange Tooltip behavior in ListPlot and ListLogPlot. Consider the following ...
506 views

### FrameLabel and OverTilde

What is the problem with this expression inside ListPrint? OverTilde generates here a mess: ...
210 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 ...
253 views

### Prevent mathematica from simplifying

How can i prevent Mathematica from automatically simplifying the expression Sqrt[a/b]? In case a=1 and ...
92 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. ...
95 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 ...
117 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 ...
179 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: ...
920 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?
97 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: ...