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

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77
votes
2answers
6k 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 ...
13
votes
5answers
852 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 ...
12
votes
3answers
425 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 ...
23
votes
3answers
2k 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 ...
13
votes
2answers
999 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: ...
4
votes
3answers
342 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: ...
2
votes
2answers
256 views

Question about MapThread and 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 ...
13
votes
1answer
404 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 ...
31
votes
9answers
8k 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 ...
17
votes
4answers
588 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?
5
votes
5answers
1k 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 ...
36
votes
3answers
4k 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 ( ...
14
votes
4answers
529 views

Button evaluation inside DynamicModule

Someone know why this Button works when clicked: ...
5
votes
1answer
314 views

Basic question about Dynamic

Please consider the following: ...
122
votes
1answer
23k 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 ...
10
votes
3answers
523 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
7answers
741 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, ...
36
votes
3answers
948 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 ...
20
votes
4answers
458 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 ...
19
votes
1answer
675 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 (...
17
votes
2answers
793 views

Interactively extract points from a plot (ListPlot or SmoothDensityHistogram)

Is there a way to dynamically define a polygon on a plot (I'm working with ListPlot and SmoothDensityHistogram) to select a ...
24
votes
1answer
586 views

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

The EventHandler documentation, More Information section, lists 5 mouse events: ...
12
votes
1answer
374 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?
5
votes
2answers
313 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 ...
13
votes
3answers
701 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 ...
9
votes
3answers
227 views

Problem with UpdateInterval

I want to monitor current results with Dynamic ...
9
votes
5answers
479 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 ...
4
votes
1answer
263 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 ...
24
votes
2answers
861 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
553 views

How can I effectively performance-profile Dynamics?

How to optimize performance-wise a complex dynamic expression (like a GUI) with lots of dynamically updated components, which require different update-frequencies? I was hesitant to ask this question ...
12
votes
1answer
277 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: ...
9
votes
2answers
703 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
318 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 ...
8
votes
1answer
549 views

Generating dynamic Inputfields

I want to create a bunch of input fields, four in this case, one for each element of the list "x", but since Dynamic has ...
4
votes
2answers
678 views

Moving From Dynamic Module to Manipulate

In trying to implement Vitaly's suggestion about how to take control of Locator events, I have been able to make headway using ...
13
votes
2answers
279 views

Rounding problems inside InputField

Consider the following InputField InputField[Dynamic[h2, If[# === Null, h2 = h2, h2 = Round[#, 0.001]] &], Number] The ...
0
votes
1answer
142 views

Slow Dynamic Button Does Not Print [duplicate]

Possible Duplicate: Why do buttons with ChoiceDialog freeze the front end? Why is SystemDialogInput failing to return a save file path? Evaluation inside Button stops after some seconds I ...
35
votes
2answers
671 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, ...
19
votes
3answers
720 views

LocatorPane and PlotRange

Consider the following snippet from the documentation on LocatorPane ...
16
votes
1answer
590 views

Manipulating a continuous stream of sounds

I need some audio-feedback when a locator is moved on a surface. I have the following code that produces a beep every time the dynamic controller is interacted with such that the pitch of the sound ...
21
votes
2answers
861 views

Why animator smoothes dynamic updates, or how to make pacman drink beer

How could I make a pacman drink beer in Mathematica? This is what I have so far ...
12
votes
3answers
294 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 ...
13
votes
1answer
237 views

Why does a variable become real when using the second argument of Dynamic?

Version 9, on Windows 7. Please compare these 2 very simple examples Manipulate[ x, Row[{Manipulator[Dynamic[x], {0, 10, 1/100}]}], {{x, 1}, None} ] and ...
11
votes
5answers
1k 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? ...
7
votes
3answers
261 views

Wrapping EventHandler by Table

I am making a grid on the screen. The grid is composed of different expressions. I want all of them to have a Gray background, which turns into a ...
4
votes
1answer
174 views

Alternative updating of a dynamic expression

I am looking for a solution to selectively update a dynamic expression expr which is dependent on multiple control variables ...
4
votes
1answer
310 views

Execute code when file is modified

I have a function the takes some time to complete. The function imports data from a .csv, parses it, and plots certain vectors from there. The .csv is constantly being updated from an external ...
3
votes
2answers
292 views

Why does the syntax highlighter color a local symbol red inside DynamicModule?

I am adding a Module inside DynamicModule here is an example (thanks to @rm-rf for this simple example) ...
11
votes
1answer
548 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: ...
10
votes
3answers
256 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 ...