# All Questions

1answer
195 views

### FontSubstitutions: how do they work?

I'm puzzled by FontSubstitutions. The help says this: FontSubstitutions is an option for Style and Cell that gives a list of substitutions to try for font ...
1answer
390 views

### How to get full-screen graphics canvas?

Is it possible to create a full-screen graphics without any front end elements like cell brackets and scrollbars? The zero approximation can be ...
5answers
657 views

### remove -1 values from a list

I would like to turn a list which looks like this one: {{-1, -1, -1}, {-1, 2, 3}, {-1, -1, 2}, {2, 3, 4}} into one which looks like that one: ...
1answer
691 views

### How do I prevent fonts sizes and line weights from scaling in exported graphics?

It's common to export graphics from Mathematica that are subsequently scaled to various sizes that cannot (at least not conveniently) be anticipated. This is problematic in cases where (as is common) ...
2answers
484 views

### Problems getting clean sunrise, sunset, civil, nautical and astronomical twilight data

If in a notebook you enter: ...
1answer
1k views

### How to add more levels to Outline notebooks

The Outline stylesheet only seems to cover 6 levels of depth. Is there any way to increase that? Here's an example. Hitting tab on the last level just indents its content, but doesn't add another ...
3answers
1k views

### Generating figures over remote connection (using terminal)

Recently I've been making movies by having Mathematica create figures and then I combine all of them together using ffmpeg. The problem now is that my macbook is ...
4answers
217 views

### Question in ParametricPlot3D, how to join the minima of a {x,y} function

Thanks to my previous question I have plotted the function with the following code: ...
3answers
237 views

### How to transpose x and y axes on a LogPlot?

Consider the following simple LogPlot: LogPlot[Exp[x],{x,0,5}] Is there a nice way to switch the axes of a LogPlot? I'm aware that plotting the inverse ...
3answers
270 views

### Map structure of irregular list, Flatten then reconstruct list using structure

I'm trying to use Compile[] to improve the performance of an algorithm. The algorithm works on a set of matrices which are not of a similar shape. Unfortunately ...
3answers
581 views

### How to make a 3D plot auto-rotate?

When doing presentation with Mathematica, I often want a 3D plot to rotate automatically, so the 3D feeling is stronger. I don't want to drag the mouse very time. So, I want a general function like ...
2answers
138 views

### Consecutive Print to target same output Cell

Is it possible to conveniently direct the output of consecutive Print statements to the same output without actually accumulating the output in a temporary string/variable. This would be useful in ...
5answers
212 views

### Lowering the degree of an polynomial with an assumption that the polynomial has a factor x^2+ax+b

Let's assume $x^{10}+x^5+1$ has a factor $x^2+ax+b$ Then, If $x^2=-ax-b$, $x^{10}+x^5+1 =0$. If we successively apply $x^2=-ax-b$ to $x^{10}+x^5+1$, we can make $x^{10}+x^5+1$ to degree 1, ...
5answers
530 views

### Building graph based on the cities connection?

I built a Graph based on the permutations of city's connections from : ...
2answers
639 views

### Solution of equation with power series (perturbation)

So I need to use Mathematica to find the solution of $y=x- \epsilon \sin(2y)$ as a power series in terms of $\epsilon$. I'd assume I'd need to create an equation $f=x-y- \epsilon \sin(2y)$, then ...
2answers
419 views

### How to open hyperlinks (from web-embedded CDF) in a new tab

I have a problem with Hyperlink (in a web-embedded CDF) opening links in the same browser tab and I couldn't find an option to avoid that. I have the following ...
3answers
461 views

### How can I make private functions inside packages

I want to make private functions.for that purpose,I wrote the following code. BeginPackage["Test1"] Begin["Private`"] function1[x_]:=x End[] EndPackage[] I ...
3answers
3k views

### Summing along rows or columns of a matrix

I have a list of rows in database such as {{a,b,c}, {d,e,f},{g,h,i}} I want to be able to add each row across and each column down (like a spreadsheet). In other ...
1answer
537 views

### Simplistic Notation example

Notation package looks poorly documented. For example, GridBoxDividers option is not documented at all. Can someone give me a simplistic example of a Notation set ...
5answers
346 views

### Handling holidays in financial time series

I have two lists: list1and list2, which are financial time series with only 2 variables—date and price. The problem is: these ...
2answers
591 views

### Nested Map and Apply

There are some other questions on this topic but I could not get an answer from reading them. What I want to do is use Apply on some of the arguments of a function, ...
1answer
392 views

### How do I constrain the region where I can drag a Locator?

How do I constrain the region where I can drag a Locator to conform to rules, including rules that apply to computations resulting from the value of the ...
1answer
443 views

### Multi-column table layout the right way

How do I create book-like multi-column table formatting for a long, narrow tables in a preferably elegant way? Should I be thinking of stylesheets, instead of formatting? I guess this is a solved ...
3answers
574 views

### What function can I use to evaluate $(x+y)^2$ to $x^2 + 2xy + y^2$?

What function can I use to evaluate $(x+y)^2$ to $x^2 + 2xy + y^2$? I want to evaluate It and I've tried to use the most obvious way: simply typing and evaluating $(x+y)^2$, But it gives me only ...
3answers
1k views

### Save and call matrices with large output in Mathematica [duplicate]

If we have the large matrix A=RandomReal[{-10, 10}, {1000, 1000}]; and I need it for further calculation, how can I save it on hard disk and then call for ...
1answer
444 views

### How to execute kernel command from Front End?

Documentation for Yuri E. Kandrashkin's OptionsExplorer package says to add the following menu commands in MenuSetup.tr: ...
2answers
306 views

### Plotting a contour line in 2d on a 3d surface

I have a list of data which I can plot as a surface with ListPlot3D. Moreover I have a set of other surfaces and I have plotted the projection of their intersection ...
2answers
163 views

### Upload a file using a WolframCloud WebForm

I tried to create a Webform in WolframCloud that asks/browses for a file and then uploads it to a specific folder. The following are the directions I investigated but it does not work: ...
1answer
314 views

### How to use MathPSfrag package in Mathematica 10?

I am interested to use LaTeX like labels in the plots that I prepare in Mathematica, and hence, I downloaded the MathPSfrag package from this website ...
0answers
144 views

### How to fix a PDF line rendering problem in V9

If I run this in V8 ...
1answer
311 views

### Preparing 2d plots for publication

When it comes to plotting a data my general attitude is to avoid post processing (say with adobe illustrator) as much as possible. To follow this strategy I would like to prepare publication-ready pdf ...
2answers
147 views

### How can I determine the hyperlink of a currently opened documentation page programmatically?

Every pages in the documentation has a hyperlink. Here are some examples: ...
3answers
259 views

### Riemann-Spherical Projection of Network onto the $\mathbb{R}^2$-Plane

I'm trying to find a way to plot the graph ...
2answers
271 views

### Is there something akin to “SubgraphIsomorphismQ” in Mathematica 9?

Provided two unlabeled graphs, $G$ and $H$, I would like to test where $H$ is a subgraph of $G$. In other words, I'd like to test whether we can prune some fixed number of vertices or edges from $G$ ...
1answer
526 views

### NestList and Euler's method

I am new to mathematica and so just experimenting with various programming constructs. Recently have been looking at NestList and how I could use this to implement ...
3answers
796 views

### Using PlotLegends

Please don't answer this with "Just trash PlotLegends" or anything like that as I have tried homebrew solutions. I keep running into problems which I can't debug as ...
1answer
1k views

### How do I find the best parameter to fit my data if the model is a interpolating function?

Hi I have a question regarding to find the best parameters for my model to fit my data. I have 3 ordinary equation, and I now just picked some parameters (...
1answer
321 views

### How do I dynamically change Manipulate controls?

What I'd like to be able to do is dynamically change the axis of a 3D plot inside a manipulate. For example if I have a function that has three input variables I'd like a 3D plot using 2 of the ...
2answers
198 views

### Delete contexts from a string representation of a symbol

I want to delete the string representing the context of a symbol. For info I need such a functionality in my ShowIt function defined here I'd like to know how I ...
1answer
129 views

### How do I force columns in a Grid to be equally spaced?

Suppose that I have this table tab, which I display using Grid. Is it possible to force the columns to be equally spaced? All ...
1answer
702 views

### Efficiently exporting many images as a video

I have many .gif images and I would like to export them as a single video file (I prefer .mov, but any video format is fine). But what if I have several tens of megabytes of .gif images? Is it ...
2answers
2k views

### How to use a matrix variable for a compiled function

I want to compile the following function which takes a matrix variable. ...
0answers
73 views

### Interpolation on an unstructured (mostly-structured) grid in 4D+

I frequently need to perform interpolations on an unstructured grid. Mostly, with the purpose of filling grid holes and then later continue with regular grid interpolations. Mathematica V9 and V10 ...
4answers
358 views

### Efficient method for Inserting arrays into arrays

This is strongly related to the following Questions: Looking for a way to insert multiple elements into multiple positions simultaneously in a list Building matrices by attaching vectors (columns) ...
2answers
116 views

### How to model shocks to parameter in a dynamic system?

My simple model is: m[t_] := m[t] = m[t - 1]*p + 2 m[0] = 0 p = 0.5 I can plot the system as: ...
2answers
227 views

### Sorting a large file

I have some huge logs, which are text files, containing up to a million rows each, and I need them sorted. Because trying to import one obviously makes Mathematica run out of memory, we must rule out ...
4answers
556 views

### Generate random points in a region with higher probability in a sub-region

I am trying to generate random samples of points in the unit square in such a way that points inside a given circle are twice as likely to be selected as points outside of that circle. I tried to ...
1answer
339 views

### Autoregressive distributed lag model

Could someone point me in the direction of creating an autoregressive distributed lag model in mathematica?
3answers
393 views

### Slow image manipulation

This is some extremely simple code that shows an image and manipulates a circle (that will be used to select a region of the image to analyze). All those Dynamics ...
2answers
376 views

### Cannot call custom function loaded from script using C/C++ MathLink

I am using MathLink with C/C++ on a Unix system in order to call a Mathematica (version 9) function and get the result. The function I need to call is a personal function of mine ...

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