Tagged Questions

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

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1
vote
1answer
179 views

Manipulate with variable number of sliders plus variable number of functions

I'm trying to setup a Manipulate where I have a variable number of sliders similar to this one, where every slider controls a function. In my case, there will be an additional slider which sets the ...
2
votes
3answers
254 views

Animation is jerky, but slider is not

When I do the following simple animation (from the book Mathematica Navigator, p. 316) the slider control changes the image smoothly, but when I play the animation it is jerky. Is there anything that ...
1
vote
1answer
151 views

Create Slider to start/stop/move Point

I want to be able to start, stop, and move the dynamically moving point simultaneously in both animations. The "PlayPauseButton" in the animations only controls the given animation. Indeed, I want ...
2
votes
3answers
129 views

Incorrect behaviour of Locator inside Show?

Why doesn't Locator behave correctly in the following code? ...
8
votes
2answers
277 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 ...
2
votes
1answer
212 views

Why is this expression being held, and how can I evaluate it?

I can't figure out why an expression isn't evaluating, even though there's no Hold* in its FullForm: ...
1
vote
1answer
116 views

Control multiple locators along a plot

Update 1 @ Michael E2, my effort - for what it is worth!: ...
2
votes
2answers
345 views

Locator to show coordinates of plot

Old I would like to make the locator follow a plot, giving the coordinates as it moves. I don't really know where to start with this one, but I would like the dynamic plot to look something like ...
3
votes
2answers
305 views

How to show the coordinates of a point and the equation of a line dynamically? [duplicate]

I am constructing a diagram that consists of a sine curve and its tangent line at a given argument. However, I want to show the coordinates of the point of tangency and the equation of the tangent ...
2
votes
1answer
145 views

Manipulate Locator warping (snap to cursor)

I'm looking to have a Manipulator Locator that moves in discrete steps and requies the user to click on/near the locator position.. consider these two examples: ...
5
votes
1answer
179 views

Using free-form linguistic input in a dynamic input field

I've been playing around with dynamic input fields; here's a basic example, which just consists of an input field where the user can enter a function and then a button that can be clicked to graph the ...
2
votes
1answer
100 views

Input[] inside DynamicModule causing a kernel crash

I have those few lines of code causing a crash and I can't figure out why: ...
3
votes
1answer
115 views

Dynamically apply a function fed by Input[]

Here is a bit of code: funlist = {Plot,ListPlot}; Input[Panel[PopupMenu[Dynamic@whichfun, funlist], "blabla"],Dynamic@whichfun] The idea here is to select what ...
12
votes
3answers
208 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 ...
3
votes
2answers
133 views

Dynamically show usage

As the title states I would like to dynamically show ::usage on several functions. Let's consider two functions here: ...
2
votes
1answer
127 views

Delay of events detection dependent of “MouseDown” position

Let's say we have a Rectangle with color which depends of CurrentValue["MouseOver"]: ...
3
votes
1answer
296 views

Automatically dealing with “disable dynamic updating”

I'm programmatically creating notebooks containing dynamic content. When a new notebook is being created, a window pops up: I then manually click on "Continue" and it will create the notebook. The ...
1
vote
1answer
129 views

Creating a Dynamic MSSQL connection

Hello i am trying to create a notebook that automatically connects to a database on MSSQL server and would then query this to create a sort of personal report. I have connected to this database and ...
2
votes
1answer
112 views

Interaction between two sliders that update the same variable

I'm basing this on the code found in the Introduction to Dynamics. I added one more slider which doesn't use the "round and snap" feature given in the link above: ...
2
votes
1answer
129 views

Remove braces, {}, from around DynamicModule output?

Is there a way to remove the braces from the front end output associated with DynamicModule? For instance: ...
4
votes
1answer
171 views

Make dynamic controls from existing list

I have a list of variables (c1,c2,c3,c4), each with its ...
0
votes
1answer
89 views

Can a large Grid of 3DListPlots be rotated by a single Dynamic control?

So I have a few hundred plots in a grid, that I thought would be nice to adjust the data view with a Dynamic slider. I'm using Jens solution for the Grid plotting here . Manipulating multiple plots ...
3
votes
2answers
151 views

Using list elements in TrackedSymbols for Dynamic

During the execution of the following code a column of three lists and two sliders are displaying in output. The first list updates if either a or b changes. The second list updates only if the value ...
1
vote
0answers
61 views

Convert ImageSize to FieldSize [duplicate]

How might I construct a function called EmToPX[p] such that the following 2 InputFields would be the same width. If not please ...
1
vote
2answers
94 views

Using Refresh to skip expensive computations

I have several variables in my DynamicModule and some parts of my computation depend only on subset of them. I am trying to use Refresh to "cache" values but can't ...
2
votes
1answer
120 views

Module Inside ToBoxes or MakeBoxes

Does someone mind explaining why Module doesn't seem to work while inside ToBoxes or MakeBoxes. ...
9
votes
1answer
249 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 ...
1
vote
1answer
87 views

Locator with Integer value coordinates [closed]

I want to get the Pixel value of an image.and here is my code ...
3
votes
1answer
57 views

Delete `x,y,z` occurrence (or any permutation of it) from parent data set (dynamically)?

Simple question: I would like to dynamically specify a list of 3 elements, {x,y,z}. Then I'd like to find that list, or any of its permutations, in a parent data ...
2
votes
3answers
162 views

Wrapping grid with dynamic

I'm trying to build a sortable grid: ...
7
votes
1answer
261 views

How to make dynamic input fields work with drag & drop

I have an application using InputField to allow a user to dynamically update a data structure. In some cases the user will want to remove a string from one field ...
2
votes
1answer
73 views

Strange response with dynamic texture and MousePosition

I built a cubic, then use MousePosition together with GUIScreenShot to take a floating region with fixed size (200*200) on the ...
5
votes
1answer
155 views

How can I use Dynamic to run a script when a new file is added to a directory?

I have an external program saving files to some directory on my hard disc. I'd like to run a script that imports and runs a script on each file as it is added to the directory. Is there a simple way ...
2
votes
1answer
175 views

Dynamic [ NotebookEvaluate [“_”] ]

A nice way to centralize various tasks in one notebook is the NotebookEvaluation function. For instance I can evaluate ten notebooks from a single notebook (e.g. ...
0
votes
1answer
108 views

InputField equations and Solve

I'm trying to get this piece of code to work: ...
11
votes
5answers
818 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? ...
1
vote
2answers
220 views

Import image using InputField and Button

I've got a pretty basic problem, which is probably easily solved, but for all my efforts I haven't found a solution yet: I want to make an Image importer of the following form: An ...
0
votes
1answer
121 views

Reuse a dynamic list [duplicate]

Consider this Dynamic list ...
2
votes
3answers
344 views

Making a multiple choice button

I've written the following code to create a multiple choice button that takes an arbitrary number of answer options and will assign a variable true/false depending on whether or not the correct choice ...
0
votes
1answer
169 views

How to compute values only if input fields are filled?

In the following code how can I keep the DynamicModule from computing values if the input values are not all filled? If I don't specify default values it will show the code used to compute the values ...
0
votes
0answers
31 views

Asynchronous evaluation of a button's action [duplicate]

What would be the best way to have the value of x update before the pause (or a similarly slow function) finishes executing? ...
4
votes
4answers
221 views

How to avoid writing $K$ loops?

I want to evaluate a mathematical function of $K$ variables each of variables varying between 1:N. One way to do this is writing $K$ loops and varying variables accordingly, as shown below: ...
2
votes
1answer
148 views

Change the behaviour of a LocatorPane

Normally, LocatorPane detects any single click as in the following example: ...
7
votes
3answers
510 views

What is the right way to construct DynamicModule

When I'm creating DynamicModules for CDF purposes I'm usualy basing on my experience with that, particular goal and content rather than on deep insight. I want to ...
3
votes
3answers
194 views

Extracting the coordinates of a point of interest from a ListDensityPlot

How can I extract coordinates from a list density plot. Example plot of interest: I need to place two points on either side of the center white circle and calculate the distance between them. My ...
0
votes
2answers
109 views

Assigning several values inside DynamicModule

I have coded a model that contains several parameters. The parameters can be changed interactively by the user using an interface contained in a DynamicModule[]. There are several "basic states" of ...
0
votes
3answers
333 views

Plotting function with Dynamic parameter

I'm trying to get this code working: a = 2; func[t_] := Dynamic[t + a]; Plot[func[t], {t, -5, 5}] The idea is: I'd like to have the dynamic parameter a change ...
0
votes
1answer
124 views

Embedded CDF Not Working

I happened to be looking at an old CDF (19 months old). It previously worked and does not now. It works if downloaded (opening or at URL). It requires dynamic functionality to be enabled but no longer ...
1
vote
2answers
222 views

Plotting a dynamical NonlinearModelFit Function

Currently I'm playing around with dynamics and the NonlinearModelFit function. To be precise, I want to fit a function the data, which range I want to specify ...
4
votes
3answers
362 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 ...