7
votes
4answers
1k views

Combining 2D slices into a 3D plot

I am currently trying to combine several 2D plots into one big 3D plot. The 2D-plots are simply input-results from calculations (so these things have 2D coördinates (x,y)). The results depend on an ...
7
votes
1answer
236 views

How to keep the non-overlapping parts when aligning images?

I would like to stitch together a pair of images. For example: ...
7
votes
2answers
185 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] ...
7
votes
3answers
662 views

How to transpose x and y axes on a LogPlot?

Consider the following simple LogPlot: LogPlot[Exp[x],{x,0,5}] Is there a nice way to switch the axes of a LogPlot? I'm aware that plotting the inverse ...
7
votes
1answer
337 views

Accidentally corrupted graphics (?) data of notebook — now it won't open

In the process of editing my scripts' variable names with a haphazard "replace in all open files" in my text editor, I accidentally replaced portions of graphics data in a notebook (and I believe this ...
7
votes
2answers
291 views

Analysis of many similar x-ray Images

From a 3d x-ray scan, I have many similar slices to analyze. Is there a way to determine the position of the three rectangles and the inner circle?
7
votes
5answers
407 views

Find positions of duplicates that are neighbours

Assuming the following list {1,2,3,3,5,6,3} I would like to get the position of values that are next to each other and are duplicates. That is, the output should be {3,4}. Thank you for any help. ...
7
votes
3answers
844 views

efficient way to give nearest neighbour and next nearest neighbour of every point in a point set

Suppose we have a point set, the points are labeled 1,2,3,....n. And p[i] is the coordinate of the point. Now I want the label of nearest and next nearest point ...
7
votes
1answer
3k views

Solving a system of linear equations modulo n

I have a system of linear equations $$ a+b+c \equiv 31 \pmod{54} $$ $$ 4a+2b+c \equiv 3 \pmod{54} $$ $$ 9a+3b+c \equiv 11 \pmod{54} $$ What should I input (I'm using ...
7
votes
3answers
608 views

Identifying when two graphic objects overlap

I'm designing a small demonstration that helps to visualize the reason behind shaping an electrode that is used to probe a surface: ...
7
votes
3answers
339 views
7
votes
1answer
806 views

Visualizing vector-spherical waves

This is a follow-up question to this one on visualizing vector-spherical harmonics. This time, I would like to visualize the vector spherical waves (including the radial dependence). The functions ...
7
votes
2answers
1k views

How can I mesh a solid cylinder with triangular or tetrahedral elements

I need to plot triangular mesh on a cylinder. However the function Cylinder doesn't have a mesh option. By using ...
7
votes
1answer
622 views

TensorContract of inverse matrix

Matrix inverse in mathematica If $A$ is an invertible $n \times n$ matrix, then $A\cdot A^{-1} = I$. To get this statement in Mathematica, you need the assumption ...
7
votes
1answer
235 views

FontSubstitutions: how do they work?

I'm puzzled by FontSubstitutions. The help says this: FontSubstitutions is an option for Style and Cell that gives a list of substitutions to try for font ...
7
votes
1answer
341 views

How to view all graphs available in GraphData?

Is there a "gallery" view of all the graphs available in GraphData? I realize that some graphs may not lend themselves to such representation (e.g. some may have ...
7
votes
2answers
451 views

How to efficiently get the value from form UI built with dynamic InputField

Here is the code that I used to make a tabular UI. ...
7
votes
5answers
1k views

remove -1 values from a list

I would like to turn a list which looks like this one: {{-1, -1, -1}, {-1, 2, 3}, {-1, -1, 2}, {2, 3, 4}} into one which looks like that one: ...
7
votes
1answer
1k views

How do I prevent fonts sizes and line weights from scaling in exported graphics?

It's common to export graphics from Mathematica that are subsequently scaled to various sizes that cannot (at least not conveniently) be anticipated. This is problematic in cases where (as is common) ...
7
votes
5answers
635 views

How to compile the code for generate Pythagorean_triple?

I am finding Pythagorean_triple, it worked slowly. I tried to compile, but it gives some warnings. I also use "Case" or "Do" ,both of them failed.I'm sure my CCompiler has been set correctly. How can ...
7
votes
1answer
496 views

Setting default Mathematica version

Is there a way to set the default Mathematica version? I would like to run both versions 7 and 8 (on a Win7 PC), but when version 8 is installed it takes priority. Clicking on a notebook ...
7
votes
2answers
647 views
7
votes
1answer
1k views

How to add more levels to Outline notebooks

The Outline stylesheet only seems to cover 6 levels of depth. Is there any way to increase that? Here's an example. Hitting tab on the last level just indents its content, but doesn't add another ...
7
votes
1answer
1k views

How to find the smallest root

I have a continuous, differentiable, monotonic, bounded function called F[t]. If t -> Infinity then ...
7
votes
3answers
569 views

Threading a compiled function over multiple arguments of different lengths

I am interested in threading a compiled function over multiple argument lists of different lengths. I will explain this in two steps: Suppose f is some function. Then one can define another ...
7
votes
2answers
732 views

How to draw multiple coordinates on mathematica?

For example: How can I draw such kinds of coordinates? Thank you~
6
votes
1answer
53 views

Run several input cells in parallel

I have a notebook with several input cells that produce data which is then plotted into separate graphs. Since I do not want to save the results, because it makes the file huge, I keep the ...
6
votes
1answer
200 views

Trouble with shooting method for a 4th-order differential equation

I'm trying to solve the following forth-order ODE with the shooting method: $$\frac{1}{5}(y-2xy^\prime)=\frac{1}{x}\left\{\frac{xy^\prime}{y}+xy^3 \left[\frac{(xy^\prime)^\prime}{x} \right]^\prime ...
6
votes
2answers
156 views

Naming convention for symbols exported from package

I know this is a little opinion based, but so is Mathematica style guide and similar topics. The issue is important so I think this topic will be beneficial for future visitors. Q: So ...
6
votes
2answers
124 views

RGBColor, ColorSlider and ColorSetter

A single RGBColor expression displays as a little square, showing the color. I just found that this little square is both a tooltip and a button. It seems to be new ...
6
votes
2answers
254 views

ToElementMesh problem on Ball defined by ImplicitRegion?

Bug introduced in 10.0 and fixed in 10.2 Could any one please confirm the following bug in mathematica 10.0.2 ? If I define this ball ...
6
votes
3answers
180 views

Choosing which edges of the box to show in 3D graphics

Is there a way to explicitly choose which edges of the bounding box to show when plotting something with Boxed->True? For instance, a plot like ...
6
votes
2answers
292 views

Extruding a wierd 2D shape to make a prismatic 3D shape

I have the outline of a 2D shape defined by a periodic radius R[θ]. I would like to extrude this linearly to a prismatic 3D object that has my cross-sectional ...
6
votes
1answer
142 views

Tools for MathLink traffic analysis?

I noticed that the documentation for LinkSnooper says that it is "obsolete". I don't have any experience with this tool, but I thought it looked interesting after seeing results it was able to provide ...
6
votes
1answer
234 views

How can I download a tweeted image given the tweet id?

ServiceExecute[] supports sending an image via "ImageTweet" i.e. posting an image in a tweet. But how can I achieve the reverse of this and download the image given ...
6
votes
1answer
160 views

Loading Packages with Parameters

I have some packages that uses database connections inside it, let's call it ConnPackage. The connection IP is a public package variable, and has a default value: ...
6
votes
2answers
230 views

SmoothHistogram inside Show doesn't respect plot range clipping?

You can try this for yourself. Run the following code a couple of times: ...
6
votes
2answers
173 views

Using a held option

Woud there be an elegant way to use a held option ? For example if I need to pass by reference several variables but I don't always need all of them, it can be useful. For example if I want to append ...
6
votes
4answers
278 views

Question in ParametricPlot3D, how to join the minima of a {x,y} function

Thanks to my previous question I have plotted the function with the following code: ...
6
votes
6answers
358 views

Total by a criteria

I am developing a weighted KNN algorithm. In a step, I need to do the sum of weights of each class. For example: ...
6
votes
0answers
290 views

Problems extending NelderMeadMinimize into 2D

Update The eventual route I followed was to adapt a version of the NM-simplex written in C and link to it with MathLink. Once I've tested this out fully I'll post it here. I've been playing around ...
6
votes
2answers
355 views

Keep kernel running for execution of scheduled task

How can I keep a kernel running until all scheduled tasks have completed? For example upon running the following script bazinga.m: ...
6
votes
2answers
601 views

Map of Swedish regions?

There have been some questions dealing with how to draw individual US states since such data doesn't come with Mathematica through its CountryData which offers ...
6
votes
1answer
763 views

How to display each step of an A star algorithm?

I wrote a pathfinding program: A*, which is an extension of Dijkstra. I want to see the result of each step at a time. Which function should I use? The main program is the notebook Astar, which is ...
6
votes
2answers
220 views

Save all input History in a log file

I would like to write some code in my init.m to save all inputs {In[1],In[2],...In[lastone]} right before I close the kernel (or exit Mathematica). Such a script ...
6
votes
3answers
1k views

How to increase Spectrogram resolution?

I have a time-domain signal that I want do a time-frequency analysis on it. When I tried the Spectrogram, I always get very low resolution. For example: I have a ...
6
votes
2answers
238 views

Consecutive Print to target same output Cell

Is it possible to conveniently direct the output of consecutive Print statements to the same output without actually accumulating the output in a temporary string/variable. This would be useful in ...
6
votes
1answer
454 views

Using MathKernel without echoing a window

I use M9 under windows 7 on a command prompt as: MathKernel -noprompt -script file.m On execution, there is a like a kernel window opened and then closed immediately. How can I avoid this window and ...
6
votes
5answers
230 views

Lowering the degree of an polynomial with an assumption that the polynomial has a factor x^2+ax+b

Let's assume $ x^{10}+x^5+1 $ has a factor $x^2+ax+b$ Then, If $x^2=-ax-b$, $ x^{10}+x^5+1 =0$. If we successively apply $x^2=-ax-b$ to $ x^{10}+x^5+1 $, we can make $ x^{10}+x^5+1 $ to degree 1, ...
6
votes
2answers
480 views

How to open hyperlinks (from web-embedded CDF) in a new tab

I have a problem with Hyperlink (in a web-embedded CDF) opening links in the same browser tab and I couldn't find an option to avoid that. I have the following ...

15 30 50 per page