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

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13
votes
5answers
1k 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 ...
83
votes
2answers
7k 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 ...
12
votes
3answers
489 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 ...
6
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 ...
3
votes
2answers
280 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 ...
24
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
1k 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
380 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: ...
14
votes
1answer
422 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 ...
3
votes
1answer
232 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 ...
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 ...
37
votes
3answers
5k 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 ( ...
17
votes
4answers
662 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
1answer
329 views

Basic question about Dynamic

Please consider the following: ...
37
votes
3answers
1k 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 ...
14
votes
4answers
618 views

Button evaluation inside DynamicModule

Someone know why this Button works when clicked: ...
12
votes
2answers
550 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. ...
4
votes
1answer
283 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 ...
129
votes
1answer
24k 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 ...
19
votes
1answer
763 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 (...
12
votes
3answers
574 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
843 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
356 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 ...
6
votes
2answers
768 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
1answer
397 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?
42
votes
2answers
792 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, ...
20
votes
4answers
502 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 ...
18
votes
2answers
914 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 ...
25
votes
1answer
628 views

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

The EventHandler documentation, More Information section, lists 5 mouse events: ...
14
votes
3answers
289 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[]: ...
14
votes
3answers
836 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
245 views

Problem with UpdateInterval

I want to monitor current results with Dynamic ...
14
votes
2answers
308 views

Rounding problems inside InputField

Consider the following InputField InputField[Dynamic[h2, If[# === Null, h2 = h2, h2 = Round[#, 0.001]] &], Number] The ...
9
votes
5answers
498 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 ...
6
votes
1answer
531 views

Enabled option for slider in Manipulate not updating dynamically

In a Manipulate expression I have a slider control which has the Enabled option ...
24
votes
2answers
918 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
578 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 ...
19
votes
3answers
790 views

LocatorPane and PlotRange

Consider the following snippet from the documentation on LocatorPane ...
20
votes
3answers
604 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 ...
22
votes
2answers
918 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 ...
18
votes
1answer
756 views

Module vs DynamicModule for a dynamic variables in a grid. || Spelling Bee

When my daughter asked me help with her spelling homework, for me the obvious thing to do was to write a Mathematica program for it. The words: ...
12
votes
1answer
288 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: ...
10
votes
2answers
362 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 ...
10
votes
2answers
357 views

Restrict Sensitivity of Locators in LocatorPane

We can restrict the movement of locators in a LocatorPane as follows: In the following example, the first locator's movement is confined to the x-axis and the ...
9
votes
2answers
778 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
1answer
613 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 ...
13
votes
1answer
249 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 ...
7
votes
2answers
406 views

Click in a vector plot to plot several solutions of a system of differential equations

I am aware of the Locator button and I am aware of the Equation Trekker package, but they are not what I want to use. Here is what I specifically want to know how to do, if possible. Consider the ...
0
votes
1answer
152 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 ...
14
votes
3answers
995 views

How can locators be added to the points on a 3D grid?

Here is a pared down example of some 3D data that I want to make dynamic and add locators to each set of points. Is that possible? ...