Questions relating to the dynamic family of functions in Mathematica, such as Dynamic, DynamicModule and Manipulate.

learn more… | top users | synonyms

12
votes
3answers
594 views

Logarithmic slider

Is it possible to create a logarithmic slider similar to this one that responds to a change of the variable value? That is, when the slider is moved, the variable value should update. When the ...
12
votes
3answers
209 views

Selective evaluation of blocks of code in a Manipulate

Is it possible to attach certain pieces of code to certain controls in a Manipulate? For example, consider the following Manipulate ...
12
votes
3answers
281 views

In InputField, how to prevent Shift-Return from generating a new cell?

When running the following in a notebook (not a deployed CDF file), it can sometimes be annoying that accidentally pressing Shift-Return breaks out of the user ...
12
votes
2answers
793 views

How to extract the numerical value of a dynamical variable

I want to inspect interactively an image by selecting points by the mouse pointer. This is easily done by LocatorPane - here is a simplified example: ...
12
votes
1answer
265 views

How to create a notebook element that can replace itself?

I would like to create a notebook element that can replace itself. Here's an example to illustrate: ...
12
votes
1answer
365 views

How to create interrelated sliders?

Say I want a slider that controls the value of $x$ and another slider that controls the value of $2x$, how would I go about it?
12
votes
3answers
278 views

How to manipulate a circle in GeoGebra style?

I want to emulate the GeoGebra app. I want to get an effect like this in Mathematica. I don't know how to move whole circle without changing the radius of the circle. My sample code: ...
12
votes
1answer
431 views

Manipulate slider unresponsive after suspend in Linux

I've tested Linux Mathematica versions 7-9 on various Linux distributions, with identical problem: after suspend/resume cycle my Manipulate controls (i.e. sliders&buttons) appear unresponsive, ...
11
votes
4answers
739 views

Manipulate BarChart with Mathematica

In the following minimal working example: Manipulate[BarChart[{a,b}],{a,1,2},{b,1,2}] I'd like to be able to control the size of the bars by using some sort of ...
11
votes
5answers
861 views

How can I simulate this animation of checking for prime numbers?

I can only implement a very simple one, I want to make my code look like that. Any better ideas? ...
11
votes
3answers
381 views

Why do buttons with ChoiceDialog freeze the front end?

Pressing the button below will freeze my front end. An unpainted white dialog box comes up, then it completely freezes, and I need to forcibly kill the front end. CPU usage stays at zero during ...
11
votes
2answers
419 views

Soft-Match String Comparison

I have a list of names in which I would like to check for duplicates. However, within the list, the duplicates may not show up as exact duplicates of each other - for instance, ...
11
votes
3answers
438 views

Plot on command within DynamicModule?

Suppose I have a DynamicModule with all sorts of controls to set some parameters for a graphics object. ...
11
votes
3answers
348 views

Drawing an arrow pointing at the “Enable Dynamics” button

Sometimes my students are given Mathematica notebooks as part of an assignment, and asked to go through some demonstrations contained in the .nb file. A lot of times I get complaints that the "graphs ...
11
votes
1answer
507 views

InputField does not update correctly

By fiddling with Vitaliy's solution for a small GUI, I've come accross this particular behaviour of InputField: ...
11
votes
2answers
311 views

Memory leak in FE?

A very abridged example of what was originally a major leak ...
11
votes
1answer
234 views

Rounding problems inside InputField

Consider the following InputField InputField[Dynamic[h2, If[# === Null, h2 = h2, h2 = Round[#, 0.001]] &], Number] The ...
11
votes
1answer
202 views

Time range selector à la InteractiveTradingChart

I have time series data and I would like to interactively select a part of it. This problem is beautifully solved in the lower part of the InteractiveTradingChart command: I would like to be able ...
10
votes
7answers
648 views

How to dynamically toggle curves on/off in a crowded Plot?

When multiple curves appear in a single plot, it is useful to interactively turn certain curves on or off to visually compare smaller numbers of curves. It is trivial to put a quick dynamic together, ...
10
votes
2answers
260 views

Make a button that evaluates a function over and over

I would like to have a command "RedoButton" which would make a button (or whatever control is suitable) that when clicked would print the value of a certain function over and over in the same place. ...
10
votes
3answers
427 views

Mathematica as a report generator

I would like to use Mathematica as a kind of report generator. I'm working in a Mathematica notebook and I want to handle Mathematica like this: 1) I want to define one cell as a text cell. In this ...
10
votes
2answers
397 views

Syntax highlighter shows error for Manipulate when it's inside a Block or a Module

I'm putting my new copy of Mathematica 10 through its paces and I noticed a weird change in the colouring scheme that I find very annoying, and I'd like to get some insight into why it's happening. ...
10
votes
3answers
236 views

Intermediate display similar to PrintTemporary

Using MMA we often come across situations like the following cityLIST = CityData[#, "Name"] & /@ CityData[]; This code if you evaluate will emit some display ...
10
votes
2answers
250 views

ShearingTransform and Dynamic

Background: I have a geometric transformation composed of a RotationTransform, ScalingTransform and ...
10
votes
2answers
294 views

Mathematica Typing Effect

Here is a Typing Effect in javascript. I could only implement a very simple one: ...
10
votes
1answer
1k views

How to work around Mathematica hanging when showing a large SparseArray?

Note: This is fixed in 9.0.1. In Mathematica 9, if I display any large SparseArray object in the default way (which looks something like ...
10
votes
3answers
493 views

How to anchor a Pane's scroll position to the bottom?

Suppose I have a Pane containing some dynamic text, for example that is being updated by a logging function. ...
10
votes
2answers
199 views

What is the point of Refresh if Dynamic has an UpdateInterval option?

I haven't found an example where I can't get rid of Refresh[]: ...
10
votes
4answers
324 views

Possible bug in Dynamic

The code below crashes the Mathematica kernel in version 10 (not in V9) every time I run it on Windows and on Mac OS. I've sent it to WRI, but was told that they could not reproduce the crash. Does ...
10
votes
1answer
193 views

TimeConstrained dynamic change of maximum time

I would like to run a time consuming function: TimeConstrained[f[x],maxseconds] and be able to change maxseconds during running (increasing or decreasing max ...
10
votes
2answers
287 views

Dependent Manipulate sliders

I would like to use dependent sliders in Manipulate. First slider K0 should be independent and varied from ...
10
votes
2answers
255 views

Update only one element in a dynamic grid?

I've got a grid of buttons that each display an image from an array. When a button is clicked, its image changes. ...
10
votes
2answers
493 views

Dynamic graphics are less responsive inside a Manipulate

I have some code which displays a GraphPlot and allows the user to click on any vertex in the graph to display some information about that vertex in a popup window. ...
10
votes
2answers
221 views

Difference between action of a Slider and a HorizontalGauge

First time posting. I am working on creating some interactive materials for the engineering classes that I teach and have run into an issue that I cannot puzzle out. I am using a slider to allow for a ...
10
votes
2answers
264 views

Two-sided slider getting stuck

I'm implementing a two-sided slider to be able to set upper and lower bound in just one slider: The problem is that it can get stuck when both locators are at the far left: And I'm unable to ...
10
votes
1answer
196 views

Why is my rasterized graphic blank?

Consider the following code: ...
9
votes
6answers
394 views

How to make text flash for a short period

How could I display text that flashed red for a half second or so and then reverted to black? (Or was put in bold and reverted to normal, etc.)
9
votes
3answers
207 views

Problem with UpdateInterval

I want to monitor current results with Dynamic ...
9
votes
4answers
414 views

Graphics can't be live and editable

Is there a way to construct an interface so that the Code and the Graphics remain in sync? For example I would like to be able to drag/drop and move around different shapes in Graphic while seeing ...
9
votes
2answers
283 views

Localizing variables within a Manipulate

I have a notebook with several examples of very similar computations, each involving the same variable/parameter names of the ingredients used in a final ...
9
votes
1answer
125 views

Tracking Initialization

How to track Initialization step by step? Any tricky solution is ok. One condition, x should be ...
9
votes
1answer
252 views

Possible bug with second argument of Dynamic

According to the documentation, Dynamic Details & Options section, especially: For interactive mouse operations Dynamic[expr,{f_start, f, f_end}] typically ...
8
votes
5answers
415 views

Manipulate Exp[I θ]+b Exp[-I θ]

I've uploaded an image showing a demonstration I'd like to create, but I definitely need help. There is a lot of talent on this list, so maybe someone can help me get started learning how to add ...
8
votes
3answers
230 views

How to allow ContinuousAction on something that is not all

I have this code: DynamicModule[{r = 1}, Grid[{{Slider[Dynamic[r]], SpanFromLeft}, {f[Dynamic[r]], g[Dynamic[r]]}}]] While I move the slider, $f$ ang $g$ are ...
8
votes
2answers
649 views

How To interactively create a Polygon in a Graphic?

Background: suppose I start with the following (working) snippet. Manipulate[Graphics[Line[{{0, 0}, p}], PlotRange -> 2], {{p, {1, 1}}, Locator}] Ideally, I ...
8
votes
2answers
704 views

What is special about 70.329862 and InputField and Number and Dynamic?

Is this a bug (happening in V9 and V10 Windows, Linux) or not? It only happens for certain numbers and you need Number in InputField. ...
8
votes
2answers
1k views

Dynamic graph visualisation using JLink/Java and GraphStream

Visualising the addition of new nodes and edges to a graph to 'watch it grow' is to something Mathematica is not suited to by default. However this type of animation really helps convey the emergence ...
8
votes
2answers
189 views

Checking from a preemptive evaluation whether a main evaluation is ongoing

How can I programmatically check from a preemptive evaluation whether a main evaluation is currently ongoing? I need a function mainEvaluationOngoingQ[] so that ...
8
votes
1answer
307 views

I want to update a financial chart when I select a new stock from a popup menu

I have the following code: Read all the DOW jones financial instruments instruments = FinancialData["^DJI", "Members"] Then I create a dynamic variable called ...
8
votes
2answers
281 views

How to draw the image of a circle under the action of a transformation of the phase flow?

How to draw the image of a circle $x^2+(y-1)^2<1/4$ under the action of a transformation of the phase flow for the equation $\dot{x}=y,\ \dot{y}=-\sin x$? Here $\dot{x}$ means $dx/dt$. Any help or ...