Questions tagged [dynamic]

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

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29
votes
6answers
3k views

How are parameters evaluated for a Plot in Manipulate

I am trying to get my head around how Manipulate evaluates functions in a Plot. I have read the introduction to Manipulate, and introduction to Dynamic, but I still ...
10
votes
2answers
922 views

Programming with Dynamic

I don't understand the following: f[a_, b_] := a + b ls = {1, 2, 3}; MapThread[f, {ls, {10, 20, 30}}] This yields ( as expected ) {11,22,33} If I change ...
132
votes
3answers
18k views

How to manipulate 2D plots?

When it comes to visual analysis, large datasets or data with intricate internal details often makes plotting in 2D useless, as the outcome is either just a fraction of the full dataset, or no details ...
22
votes
3answers
936 views

Button action monitored with progress bar

Let's say you have a palette with a button that has to do some time-consuming task when clicked: ...
37
votes
4answers
992 views

What is the difference between Dynamic[x] and Dynamic[ h[x] ] for DynamicModule variables?

Bug introduced in 9.0 or earlier and persisting through 12.0 In 11.3 it is even worse. An example from the accepted answer with a Slider is now broken too: ...
7
votes
5answers
3k views

sliding a tangent line along a curve

I am confused by Dynamic. I am trying to slide a tangent line along a curve, without using DynamicModule, so that I can include ...
52
votes
3answers
11k views

How to create a progress bar?

I would like to create a progress bar tool that allows me to see how my computations are going. I found answers to this question on many sites, I even found a package for it ( http://www.physics.ohio-...
13
votes
3answers
813 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 this....
25
votes
4answers
739 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[]: ...
55
votes
2answers
2k views

How safe is the use of Block and Internal`InheritedBlock

For many questions on this site answers are given which suggest to use Block and, especially for more advanced topics, ...
34
votes
3answers
3k views

Generating graphs interactively (GUI)

I want to create graphs interactively using a GUI. I thought of using a ClickPane[] environment. The code I have (in part borrowed from the Documentation) works ...
41
votes
3answers
2k views

How can I set up a versioning system within a notebook?

Since the Frontend crashes a lot, for important work it would be nice to have the notebook automatically branch and save itself every so many minutes. For instance, commands like StartSavingCopies[5]...
6
votes
1answer
212 views

Working with Dynamic: Synchronization with EventActions ( and other preemptive evaluations)

I would like to make a simple "game": Display a dialog with a random letter, if the same letter is pressed on the keyboard, the display changes into a string ...
4
votes
3answers
647 views

How can I compare a dynamic variable with a literal in Mathematica?

I'm doing a Mathematica Notebook and I want to make an alarm clock. Something like this: ...
3
votes
1answer
640 views

Initializing Manipulator value within DialogInput (version 10.1 only)

Bug introduced in 10.1.0 and fixed in 10.2.0 I've confirmed, with WRI, that an issue was introduced in version 10.1 with regard to initializing Manipulator Dynamic ...
36
votes
4answers
1k views

What are the most common (usual) ways to make palettes with non-trivial functionality?

What are the best (most robust and most convenient) ways to create palettes that can be installed permanently (using Palettes -> Install Palette...) and are safe ...
19
votes
1answer
766 views

How can I include functions from a package into a CDF file?

I am building an application which I would like to deploy as a CDF file, and I am struggling to make the CDF exports work correctly with functions pulled from a .m package file. What are good/best ...
17
votes
1answer
574 views

Is it possible to use Begin and End inside a Manipulate?

May be someone can explain why I can't use Begin["context`"] and End[] inside a Manipulate ...
13
votes
2answers
534 views

Avoiding slow evaluations in Manipulate when combining graphics with Show

I want to figure out how to combine several graphics in manipulate such that only the ones that change are recomputed. I looked into the tutorials on Advanced Manipulate, but couldn't figure out how ...
12
votes
2answers
314 views

Working with DynamicModule: Tracking the progress of Initialization

How to track Initialization step by step? Any tricky solution is ok. One condition, x should be ...
39
votes
9answers
16k views

How to create animated snowfall?

Well, the title is self-explanatory. What sorts of snowfall can we generate using Mathematica? There are two options I suggest to consider: 1) Continuous GIF animations with smallest possible number ...
15
votes
4answers
1k views

Button evaluation inside DynamicModule

Someone know why this Button works when clicked: ...
16
votes
3answers
356 views

How to track part of symbol or how to symbolize parts of symbol without copying data?

Let's create simple function: SetAttributes[h, HoldFirst]; h[data_] := Dynamic[Grid[data], TrackedSymbols :> {data}] test = RandomReal[1, {2, 2}]; h[test] ...
17
votes
2answers
3k 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: ...
10
votes
4answers
424 views

Working with DynamicModule: ScheduledTasks with local variables

I have a question - is it possible to run ScheduleTask[] inside DynamicModule[]? What I have tried so far: ...
4
votes
1answer
482 views

Evaluation inside Button stops after some seconds

I would like to trigger a long calculation inside a dynamic module with a Button. It seems that the evaluation stops without an error-message after some seconds. I made a test outside the a dynamic ...
25
votes
4answers
857 views

How to Initiate a queued evaluation from a Dynamic GUI without using a Button

I have a Dynamic-based GUI, and one part of it will kick off a calculation that could take longer than the default 5-second dynamic timeout. I know that ...
22
votes
3answers
1k views

Using Refresh[..] with TrackedSymbols

This is a very basic question, but I don't understand the following behavior. The usage to Refresh reads represents an object whose value in a Dynamic should be ...
16
votes
2answers
662 views

Allow multiple GUI elements to react dynamically to interaction with a single element

I was looking at how to reproduce the interactivity in this visualization (the layout can be done like this). Hovering a node with the mouse highlights all edges that are connected to it. How can we ...
21
votes
5answers
1k views

How can I make an InputField with a proper newline/carriage return?

The return key does not work as expected in an InputField, how can I overcome this?
12
votes
2answers
757 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 ...
16
votes
4answers
522 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
3answers
809 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. ...
11
votes
7answers
2k 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, ...
6
votes
2answers
615 views

How to dynamically update Locator[] constraints?

I need to visualize Menelaus' theorem for a triangle with moving locators for each of six points. So the vertexes of the triangle can move in any possible way, and the three points on the sides of the ...
18
votes
1answer
603 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?
16
votes
2answers
1k 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. ...
12
votes
3answers
509 views

Problem with UpdateInterval

I want to monitor current results with Dynamic ...
5
votes
1answer
390 views

Basic question about Dynamic

Please consider the following: ...
38
votes
2answers
1k views

How do I find all the possible events that work with EventHandler?

The EventHandler documentation, More Information section, lists 5 mouse events: ...
22
votes
1answer
1k views

What is the proper method to load a Mathematica package inside a DynamicModule

I have a DynamicModule that requires loading of Mathematica packages. The usual methods do not seem to apply (...
14
votes
2answers
1k views

How can I create an interactive ColorFunction using Manipulate?

I am trying to specify my own colors and scaling for the ColorFunction in ListDensityPlot. I have several lists of 2D values ...
15
votes
3answers
431 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
4answers
2k views

Dynamic Epicycles

Thanks to all the thorough answers and comments, I've written the following code for an arbitrary number of epicycles. However, when I apply the formula $\gamma(t)=e^{it}+\frac{1}{2}e^{7it}+\frac{i}{3}...
12
votes
2answers
1k 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 ...
12
votes
1answer
307 views

Notebook's WindowSize interference with contents' Dynamic ImageSizes

Bug introduced in 8 or earlier and persists through 11.3 Consider the following MWE: ...
10
votes
1answer
167 views

Evaluation leak from Dynamic in Button's action

a = 1; Button["Print", a++] Button["Print", Dynamic[a++]] Button["Print", Dynamic[a++];] Button["Print", {Dynamic[a++]}] Dynamic @ a The second ...
6
votes
1answer
947 views

Enabled option for slider in Manipulate not updating dynamically

In a Manipulate expression I have a slider control which has the Enabled option ...
164
votes
1answer
29k views

Mathematica Minecraft

Some time ago I asked myself: with all these great graphics and interactive capabilities of Mathematica, what kinds of 3D games can be implemented in it? And the answer which came to mind is ...
20
votes
3answers
1k views

LocatorPane and PlotRange

Consider the following snippet from the documentation on LocatorPane ...

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