# All Questions

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### Mathematica package for supergravity and superstring theory

I am looking for a Mathematica package that can manipulate tensors for supergravity, string theory or M-theory. I am particularly looking for a package that can do spinor and Clifford algebra ...
181 views

### Why is SparseArray and InterpolationFunction always grayed out?

In the front end of Mathematica version 10, a new feature was implemented which dims output cells that no longer correspond to its input cells. So when you type ...
81 views

### What kind of object results from RegionIntersection function?

I'm trying to use RegionIntersection in a couple of Polygons. The polygons are the following: ...
34 views

### WSTP Callbacks into CDF

Essentially, what I am trying to find out is the limitation of the WSTP/LINK protocols in Enterprise-licensed CDF. Specifically, are any callbacks to the kernel from those protocols allowed in CDF , ...
134 views

### Mathematica 10 doesn't support path containing Chinese characters

I tried to import file in Mathematica 10 ( windows 7 system), the path contains some chinese characters. After holding ctrl+shift, and drag the file into front end. I got path like ...
83 views

### Software for effectively modeling gears

Are then any applications for effectively modeling gears in mathematica?
1k views

### Mathematica 10 funny bug / Easter egg?

I have no idea what is happening here. I'm using Mathematica 10. I mistyped "FriendNetwork" as "FriendsNetwork" and got a weird result: The option "FriendsNetwork" is not even listed in the help ...
79 views

### Ploting legends in contourplot

In Mathematica 8. Given this: ...
28 views

### Balanced n-ary Base Representation

This may be a repeat question, but I was wondering how one would implement the expression/calculation of a representation of a given number h in base balanced n-ary, where n>1 is odd. (For example, ...
140 views

### How to make Missing[] invariant for some functions without redefining them

Missing[...] "is a symbolic object, with no default evaluation rules defined." Missing data can be tagged and enables use of filters like DeleteMissing. So it's worthwhile to normalize various types ...
575 views
+100

### Mathematica 10 Notebook Fonts Look Bad

I've upgraded my home installation of Mathematica from version 9 to 10 today on a Windows 8.1 machine, and I'm getting a weird font issue - the fonts are not anti-aliased, and look unbalanced and ...
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### Issuing user-defined messages takes a long time (Message is slow)

Issuing messages takes a very long time in version 9 and version 10. Can others reproduce this? Is there a fix? Update: This is slow only when using the front end, but not when running the kernel ...
151 views

### BoxWhiskerChart - 10-90th percentile instead of min - max

I am trying to draw a custom BoxWhiskerChart with alternative values determining fences. I have data that has a lot of outliers and I have to compare it to another chart that has 10-90th percentile ...
68 views

### Adding a tree to a list of trees within a loop [duplicate]

I'm trying to write a function which for a list of trees checks if a given tree is isomorphic with any of the listed, and if not - adds it to the list. I tried to use both ...
37 views

### Apply IC and BCs on Second - Order Linear PDE

I am now trying to solve second - order linear partial differential equation in that interested eq. has been separated into variables to simplify the procedure for Mathematica. Here is my equation; ...
107 views

### Implement settable properties

I am looking for advice on implementing the following. (It is possible that the answer is that it is simply not a good idea to do this.) I would like to have an object similar to ...
28 views

### How to solve equations over polynomial rings

sorry if my question is very basic but I don't know what to even search to look it up and the only "obvious" places I thought of had nothing. Some background, for whatever context it might provide. ...
27 views

### Backward compatibility for plugins

Are plugins normally backward comatible? I would like to buy a plugin ready for Mathematica 7 and use it on Mathematica 8.
46 views

### Poor (network) performance of Interpreter[“Time”]

I was surprised to see that Interpreter requires external WR resources as this is not documented, at least not here. On a 3Ghz iMac, took ~half a minute to ...
49 views

### How can I name and manipulate several Input Fields? [duplicate]

I am completely new to mathematica--and have a very basic knowledge of programming. I would really, very much appreciate it if someone could explain to me how to refer to values entered into specific ...
66 views

### TimeSeriesForecast Forecasts

I am trying to make sure I understand how TimeSeriesForecast works. I apologize in advance for the basic nature of this question. I am using Mathematica 10. I ...
74 views

### ListPlot[] code for CSV file not working

I have a CSV file with $9$ columns. I want to plot them in the following way. Column $1$ will be along the $X$-axis. Any point $(x_i, y_i)$ of $i$-th curve in the plot will have the $x$ value from the ...
61 views
+50

### Using cursors with result sets to reduce memory usage

I have a database table with 900,000 rows and 80 columns per row which I'd like to work with in mathematica. My computations are isolated to each row, so I'd like to stream only a single row (or small ...
61 views

### How to draw a shock polar like picture? [closed]

How to draw a picture like this? http://en.wikipedia.org/wiki/Shock_polar
32 views

### how to define (independent) the scale of x-axis and y-axis?

I want to compare 2 plots, and view that 4 lines are exactly the same tangent. So I would like to view 2 images with the same scale in the y-axis and the same scale in the x-axis How can I do this. ...
94 views

### how to find intersection between a parametric trajectoy and a point

I'have a 2d-system of differential equations, analitycally solved, depending on a parameter. I know that, by continuity, there exist a minimum value of the parameter such that trajectory passes ...
203 views

### All possible pairs of two items

I have 4 different items {1, 2, 3, 4}. I want to obtain all possible pairs of two of the items. I have written: ...
125 views

### Fitting the Plot by fourier Series of either sine or cosine

I have list of data and its plot and I don't know how to fit the plot with fourier series of either sine or cosine. Full Data: ...
83 views

### MinGW-64 and CompilationTarget -> “C”: can't make library

I'm trying to set up my new Windows 8.1 tablet to compile Mathematica (9.0.1) functions to C, using the MinGW-64 compiler. I have it set up so that the following works: ...
54 views

### Attempt to Run[“inkskape”] fails

I wrote a little script to convert various graphics files (.ps, .eps, .pdf) to the raster ones (.png). Export[out, Import[in], ImageSize -> size] fails for some ...
40 views

### What is the definition of FitResiduals

What is the definition of FitResiduals in Mathematica? I could not find its definition in the Mathematica help. Is it the same as chi squared?
78 views

### “The function DiscretizeGraphics is not implemented for GraphicsComplex” confusion

Why does DiscretizeGraphics seems to work on one GraphicsComplex and not the other? Here is an example that works: ...
50 views

### How do I obtain the Fisher Information Matrix from a data set?

My apologies in so much as this is probably in large part a problem of me not being aware of the necessary mathematics but since this should be a common issue in machine learning and Mathematica now ...
67 views

### How can I modify specific key values within a dataset?

Given a dataset, is there a way to modify a value? Example ...
128 views

### Add contour lines to Graphics3D

I am writing the following code: ...
124 views

### Dispatch displays rules incorrectly and evaluates when displaying

Consider this a = 3; disp = Dispatch[Unevaluated[{a -> 2}]] We see the rule 3 -> 2, rather than ...
61 views

### StreamPlot,StreamPoints and the Fisher's equation

I'm trying to reproduce a StreamPlot from a vector field encoundered while analyzing the Fisher's equation (http://en.wikipedia.org/wiki/Fisher%27s_equation), for a ...
38 views

### Export Notebook causes an INTERNAL SELF-TEST ERROR: Files2|c|1713 message

On my machine (Windows 8.1) and M10 the following two lines, that must be run on an already saved notebook, ...
152 views

### Classify command in Mathematica 10

Where can I find documentation about the methods used in the Classify command in Mathematica 10? Specifically, how does the method ...
227 views

### Plotting 3D piecewise function with distinct colors

I want to draw the following picture in Mathematica as shown below with distinct color for each section.
35 views

### Bug report: Attempting to Save Selection As… in a magnified Notebook fails with errors

I have found that attempting to Save Selection As... in a magnified Notebook fails with errors. On my system it can be easily reproduced by: opening any documentation page setting Notebook ...
183 views

### Is this a bug in FunctionDomain (V.10)?

I used FunctionDomain[1/(x^3 + 1), x, Complexes] and got 1 + x^3 != 0 Is this a bug in FunctionDomain (V.10)? Can I receive $x \neq -1$, \$x \neq ...
464 views

### Why is there a huge performance gap using Map with more than 100 List entries

im using Map on a List like this: cube= {{1, 1, 1}, {1, 1, 2}, {1, 1, 3}, {1, 1, 4}, ... , {5, 5, 4}, {5, 5, 5}} Mapping the whole List with 125 entries takes ...
53 views

### intersection between two curves in Mathematica [duplicate]

I have a ListLinePlot of some datas and a plot of a constant function. How can I find the intersection point? My data are: ...
44 views

### Replace distinct values of list with values of another list

First of all I´m new to Mathematica; I´m trying to exchange distinct values of a list with values of another list (piecewise). I thought ReplacePart in combination ...
205 views

### Version 10 of Mathematica in Windows XP

I obtained the latest version 10 of Mathematica however, when I start the installation the process aborts and a pop up window explains that "The program requires Windows NT version 6.0 or later". As ...
115 views

### how to write string to file without Quotation mark

I am trying to Write String to file, something like this: Write["test.txt", "This is a test"]; when I opened the file I found that the string was written with ...
64 views

### Strange behavior of my vertex eventhandler!

I have two level EventHandler. The inner one is made of vertex of Graph and the other outer one is of the Dynamic Graph. (1) If I select a arbitray place on the Graph except a vertex, then every ...