# All Questions

204 views

### How can Time be made to go backwards?

I would like to make a countdown timer, but cannot find a reliable method to make the DateList[] function reverse. The not so robust code for the Digital Clock with the display of seconds follows: ...
177 views

### Programmatically opening a palette from the Palettes menu

How can I programmatically open a palette from the Palettes menu? Is there a Front End token for this? Motivation: Certain settings for the palettes that are installed into standard locations and ...
2k views

### Using Export[] sends the file where?

I am trying to use the Export command to convert a list of plots into a *.gif file, and the command runs and executes well, but I can't find the file! Where is it ...
443 views

### How do I display imported images at actual size?

I know that this is an extremely basic question, but I am having a lot of trouble finding the answer in the documentation. When I import an image (for example, ...
82 views

### How safe are ReadProtected and Locked symbols? [duplicate]

Possible Duplicate: How to distribute proprietary Mathematica code I suspect that there is a way to expose the down values of such symbols with an attack along these lines: ...
186 views

### In Mathematica 7 for Windows, is it possible to use custom GUI magnifications?

I am running Mathematica 7 on Windows XP Pro. I often use the magnification feature to zoom in on Plots, ListPlots, and ...
411 views

When I do: ...
260 views

### Hakim's Sphere in Mathematica?

Hakim El Hattab's Sphere, consists of only a handful of lines of Javascript, and would probably be even terser if written in Mathematica. How difficult would it be to "transcode" Mathematica to JS? ...
417 views

### How can I italicize FrameLabel directives?

Suppose that I use Frame -> True in Plot. Then I can use ...
138 views

### Function[] argument nesting for operations like Select[]

The following code selects a special element from a list thelist = {"this", "notthis"}; Select[thelist, (# == "this") &] What I want is a function which ...
88 views

### How to pad Background size in Style calls

When highlighting text using Style and Background, as in ...
94 views

### Refreshing the Palettes menu

How can the contents of the Palettes menu be refreshed (preferably programmatically) without restarting the Front End? When droppping a new palette notebook into ...
277 views

### How can I hold UpValues but evaluate other expressions?

Consider these definitions: own = "OwnValue"; down[_] = "DownValue"; sub[_][_] = "SubValue"; N[n] = 3.14; _[___, up, ___] ^= "UpValue"; The attribute ...
164 views

### Using different random values at each recursion step

I have the following code: ϕ[0] := π/4 ϕ[n_] := Exp[-n] ϕ[n - 1] + Sqrt[1 - Exp[-2 n]] M M = RandomVariate[NormalDistribution[0, 1]] For this recursion relation, ...
1k views

### How to plot Fit functions?

If I do something like this f[x_]:=x^2 Plot[f[x],{x,1,10}] Mathematica plots the function $f(x)=x^2$, as expected. However, ...
332 views

### Adding Lists Together

This is something that should be simple, but the documentation and other questions don't seem to deal with it. I can think of mechanically doing it through a loop, but I know there must be a better ...
2k views

### How to convert a system of parametric equations to a normal equation?

For example, I have a system of parametric equations (R is a constant number) : ...
578 views

### Basic Dynamic Interface Programming that returns variables to nb functions

I have a dynamic module that contains some basic PopupMenu's and Buttons but also need to use the variables returned from these buttons and PopupMenu's in my nb functions outside of this ...
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### DatePlus and DateList are inconsistent with numerical handling of the final element

If you run this code you will see that DatePlus and DateList are inconsistent in the format of the lowest order element of the ...