1
vote
1answer
60 views

Simplifying Expressions for FindMinimum

I am currently trying to apply the FindMinimum function to find the lowest energy of an expression. My current expression as of now is relatively complicated. It is the summation of 48 similar terms, ...
5
votes
1answer
108 views

How are p-values in fittings estimated?

I am trying to understand how p-values retrieved in a ParameterTable estimated but I couldn't find any specific information in the documentation about this. For instance, considering ...
1
vote
2answers
76 views

How can I remove the decimals in the frame ticks?

Is there any way to remove the decimal places in the frame ticks. I would like to make the y axis ticks integers. I use the following code. My only problem is how to manipulate the y axis without ...
3
votes
2answers
93 views

Sections with unidirectionally shared variables

I have 2 sections is my notebook: ...
1
vote
1answer
45 views

calculate relationship between cause and effect (rows/columns/delta etc.) on tableform

I tried to enter this Excel (on the right of the picture) information to program. following these codes has been used: ...
6
votes
2answers
114 views

LineLegend behaves differently in ListPlot in Mathematica Version10.0 or later

Suppose I want a line legend for a list plot: ...
10
votes
1answer
81 views

All value types for a symbol?

Robby Villegas here shows a nice way to see all the types associated with a symbol. He sets a symbol, valueTypes, to an explicit list of the values types in ...
0
votes
1answer
56 views

Reverse of Apply on built-in functions [on hold]

So if I have can use Apply and Or in combination: Or @@ {a, b, c, d} Out: a || b || c || d One could also use Or[a, b, c, ...
9
votes
3answers
192 views

Suppress Print[ ]s?

I have a complex program that prints out lots of diagnostic/tracing information. Is there some mechanism to evaluate it and suppress all printing? I know I could protect every ...
0
votes
1answer
55 views

Create a sum with the Do function and modules

I should define a function which sums up from k=0 to 100, with x=1; using the ...
0
votes
1answer
58 views

Replacing the Slot in an expression

So I've got Mathematica to handle the grunt work for me to obtain expression: Root[ (* blah, blah *) + #^2 + (* etc, etc *) ] Now, the value inside Root is a ...
2
votes
1answer
108 views

“ReliefMap” and “ContourMap” unable to download error

This question may be closed as "too localized". I post in the event other users have had this error and resolved it. The problem: inability to use "ReliefMap" or "ContourMap" options for ...
-3
votes
0answers
60 views

Numerical integration giving trouble [on hold]

Recently I have been struggling with this problem and I think an outside look (and expertise) is what I need. I have a set of equations that in the end give me the tuple ...
0
votes
1answer
49 views

I have a problem in plotting simple Exponential Equation? [on hold]

The simple piece of Code is given below. ...
0
votes
0answers
56 views

Is there a better way to get nice looking equations in output?

I use Mathematica regularly for my schoolwork, however it's arduous to use TraditionalForm[HoldForm[f[x]==x]] every time I want it to spit out a good-looking bit of ...
0
votes
0answers
63 views

I want to draw my data on desktop by mathematica [on hold]

Hello Mathematica users, I have problem to set working directory, I want to draw my data on desktop , the data input file 2.data, i using mathematica 10 on mac Set Directory["~/Desktop"] please help ...
2
votes
1answer
76 views

ColorReplace does not work

I want to do - seemingly - simply image processing. I want to replace all blue pixels with white pixels. The obvious command would be: ...
2
votes
0answers
33 views

Tree graph showing the orbits under the Collatz map?

ReverseCollatzPaths is a nice demonstration of a radial tree graph showing the orbits under the Collatz map. However, Jason Davies gives, I think, a nicer visulalization using Python, with a ...
-3
votes
0answers
55 views

How to draw the pentagon or hexagon into the square size image [on hold]

I have the image of square or rectangle sized i want to draw the pentagon or hexagon line in the image.
2
votes
2answers
140 views

Efficient List of Lists

I'm running some analysis that requires the creation, row by row, of a large list of lists. The big list is called "Nodes" and it will ultimately contain hundreds of thousands of rows. The first few ...
0
votes
0answers
37 views

How to get partial results from Subsets[]? [duplicate]

Oftentimes I am searching for the first item in a sequence that satisfies some property. For example, consider the subsets of prime numbers whose total is prime. To start generate them, we could ...
2
votes
0answers
29 views

ArrayPlot: colours depend on image size? [on hold]

ArrayPlot is giving me incorrect colours when the image size is less than about 10.5 times the number of pixels in the input array. For example, ...
0
votes
0answers
11 views

How to mathematically prove that the continuous data is better for finding out the correlations than the binary data? [on hold]

If I want to calculate the correlations among the components in a vector space using the MLE with a prior of multivariate Normal distribution, which kind of data should be better? The binary data or ...
1
vote
1answer
74 views

Image manipulation is too slow

When I hit shift+enter at a document, I must wait for a long time. But AbsoluteTiming function indicates it just spent under 1 second. as follows. I think it shows that only 0.24sec took to ...
6
votes
2answers
57 views

How to count the number of values in a discrete function?

I have a discrete function of an integer variable $n$ defined like this : ...
3
votes
0answers
34 views

Undeclared Identifier error in Compile

I've been trying to compile a couple of functions in Mathematica, and I keep coming across an error that I do not know how to resolve. Consider the following function: ...
6
votes
2answers
70 views

Delete vertices of degree 2 and rewire graph

I want to delete all vertices of degree 2 from a graph and rewire it. Given a graph like graphA, I want to obtain graphB. ...
4
votes
4answers
232 views

Replace matrix rows conditionally while avoiding For loop

I have the following variables: myMatrix={{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}} myIndices={1,3} I need to replace the rows ...
-1
votes
1answer
43 views

Position not working? [on hold]

I have the list: myList={0,0,0,a,b,c,0,0,d} I need to find the positions of all elements that are non-zero. I do like this: ...
5
votes
0answers
69 views

DSolve returns an answer that is not a solution

Investigating DSolve misses a solution of a differential equation, I came across this odd behavior of DSolve. The following DSolve command returns an answer to the ...
1
vote
0answers
38 views

Plot is wrong for oscillating function [duplicate]

It doesnt even oscillate that much Plot[Exp[-Pi x^2 + I ( 60 1/(x^2 + .6) + 0.2)] // Re, {x, -2, 2}, PlotRange -> Full, MaxRecursion -> 15] What is ...
4
votes
0answers
46 views

How to define a bivariate skew normal distribution?

There is BinormalDistribution that handles easily bivariate normal distribution and its mixtures. There is also ...
0
votes
0answers
29 views

How to (efficiently) export the tutorial files as PDF?

The English version is freely available online at wolfram learning center. I also have a Chinese version of Mathematica 9.0.1. I wonder if there is an easy way to export the help files as PDFs from ...
-3
votes
0answers
44 views

Plot experimental data from .dat file [on hold]

I have a huge table of 42 columns of data in a .dat file, which I need to plot as a 3d-plot. How can I do that?
1
vote
0answers
66 views

NonlinearModelFit::nrnum error [on hold]

I'm trying to fit data (including some small negative numbers at both extremes) to a normal distribution. ...
0
votes
0answers
49 views

How to replace element by element in a list? [on hold]

I have the list: myList={{a,b,c},{d,e,f},{g,h,i}} I need to transpose every element individually, so I do: ...
3
votes
1answer
45 views

Extending Button's Method -> “Preemptive” 5 second timeout

This is an example from the documentation for Button : ...
5
votes
1answer
81 views

How to make sense of LowpassFilter, SampleRate and the cutoff frequency ωc in different Mathematica versions?

How do you make sense of the scale of "time" and "sampling" when using LowpassFilter and SampleRate ? Given the test data with ...
1
vote
0answers
33 views

Mixture of a bivariate distribution defined as a copula

I define a bivariate distribution: ...
3
votes
1answer
113 views

How can I prevent SHIFT-ENTER moving the editing cursor?

What I do: Here press Shift+Enter to evaluate. What I get: The cursor disappeared What I want: The cursor retained Workaround: Up Arrow as many times as it takes, Right arrow as many times ...
4
votes
1answer
79 views

Substitute a function's definition for its name

I'm having trouble with a function which is supposed to work on another function. Simplified version: ...
0
votes
0answers
32 views

What is diffusion map? [on hold]

I have trying to understand this diffusion map,I know it has something to with statistics and reducing no of variables in calculation, I was reading a article which uses this diffusion map to ...
4
votes
0answers
39 views

ListLogPlot error when forcing y axes start at 0

I came across an error I can not circumvent. When plotting the following: ListLogPlot[Table[1/x, {x, 1, 100}]] I receive a functioning plot. If I now want to ...
2
votes
1answer
32 views

How can one easily toggle the “insufficient version” warning message in CDF and Mathematica?

Unfortunately people use different Mathematica and CDF versions and the default setting of "InsufficientVersionWarning" in MessageOptions is True both in Mathematica and the CDF Player (which is quite ...
5
votes
1answer
92 views

Efficient upsampling of multidimensional array

I would like to efficiently upsample a multidimensional array. It's a 5000*5 matrix where each element is a submatrix 12*12 and it is that 12*12 matrix I want upsampled (to 24*24). The upsampling ...
6
votes
2answers
179 views

Mathematica 10, Show, and PlotRange

I have recently moved from Mathematica 8 to Mathematica 10, however I'm having a problem with PlotRange->All in combination with Show[]. For example, ...
1
vote
2answers
69 views

Options for a function I define that can be passed to functions I call in the definition

I know, this is very close to Functions with Options and/or Function with custom Options and modified Options for built-in Symbols, but I don't get it. My function looks like this one: ...
0
votes
1answer
34 views

Specifying a PopupMenu in a Manipulate expression

In my previous question here, I had a problem with showing GeoGraphics in a CDF document, but thanks to other users, I was able to solve it. But the code I wrote to test my work gave an error. I tried ...
8
votes
1answer
160 views

How to change the font color of a variable in whole input cell

I want to track the occurrence of a particular variable in a code. So the idea is to change its color. Usually I do it in a crude way - convert the code into text and then use ...

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