The tag has no wiki summary.

learn more… | top users | synonyms

3
votes
2answers
220 views

How to create a 'shortest-path link matrix'?

I am currently struggling with a problem in Mathematica. I have a randomly generated weighted Barabasi-Albert graph and a corresponding demand matrix of the same size. I'm generating the graph with ...
2
votes
2answers
104 views

How to initialize several elements per iteration with Table?

I would like to initialize this kind of vector : {0,0,1,1,0,1,0,1,1,1,1,1} with Table. I tried ...
2
votes
5answers
146 views

Creating a conditional table

I'm trying to create a conditional table. Let's say I want to have such result: {1,2,3,4,5,0,0,0,0,0}. The idea is to create a table of n elements (10 in a given example), but when one element takes ...
2
votes
1answer
78 views

Multiple plots using dynamics

I am studying Dynamic and DynamicModule, and I have tried to make a simple plot of a family of real functions. The number of functions should be a dynamic variable controlled by a slider. So I have ...
0
votes
1answer
57 views

Matrix consisting of the matrices [duplicate]

I need Dirac Matrix in my work. They consists of PauliMatrix and ZeroMatrix, which is: ZeroMatrix:=IdentityMatrix[2]-IdentityMatrix[2] I define Dirac Matrix as: ...
4
votes
3answers
194 views

Skipping over iterator values in a Table

I have been using the built-in function Table for some computations. (The following is not an actual representation of the equations I am using). ...
0
votes
1answer
36 views

Series not evaluating to numerical answer [closed]

I am working on an example from a book (An Engineer's Guide to Mathematica). The following code is in the book: ...
1
vote
0answers
86 views

How could I make an Excel-like table?

I am looking to build a simple Excel type of a table with four columns. I have spent some time researching Mathematica documentation, but haven't come across a way to implement that. Here is a ...
0
votes
1answer
30 views

Importing Output from Linux mpstat to Calculate Aggregate and Per-CPU Averages, Creating Tables and Graphs

I'm a Mathematica noob, running a trial version for the moment, but have run into the wall trying to handle this in Excel and am looking for other options. While running a benchmark application I'm ...
1
vote
2answers
82 views

Display Matrix of values with position [closed]

I want to find the table of values of $x^2 + y^2$ in steps of 1, from $0$ to $5$ for $x$ and $y$, together with the position $(x,y)$: something like this: I can only display the $x^2 + y^2$ value but ...
1
vote
4answers
136 views

Finding maximum value with position from Table of values

I have this table of values, how do I find the maximum value? i.e. find $z_{max}(x,y)$ ...
1
vote
2answers
52 views

TimeConstrained for Table?

Let's say that I have a function f[i] that takes quite a while to evaluate (evaluation time is different for different i) and I'd like to have as many values of ...
0
votes
0answers
102 views

Improving the speed of evaluating Table with nested functions

I am a Mathematica novice working with a stack of 1024 x 1024 WatershedComponents (or MorphologicalComponents) label matrices ...
2
votes
1answer
36 views

Can I use what “headerlines” removes from a CSV as TableHeadings for the table I create from that File?

I am reading in some data from a CSV file that has a line which gives titles to each "column". Here is an example: ...
4
votes
2answers
150 views

Table with multiple iterators running parallel

I want to use Table to generate a list, but it only allows one iterator to increment at a time. So in ...
0
votes
0answers
30 views

Generating a Table with a certian Density [duplicate]

How do I create a random table of 0's and 1's with a certain density instead of a probability? For Example: Manipulate[ Table[RandomChoice[{1 - density, density} -> {0, 1}, {10}]], ...
2
votes
3answers
69 views

Reduction of repetitive calculations in Table

If I generate two tables inside a function which are function[n_, x_, y_]:=( table1 = Table[i* x/n^x, {i,1,n}]; table2 = Table[i* y/n^y, {i,1,n}]; ) where ...
0
votes
0answers
82 views

How to be faster at making a frequency list of increasing steps

I want to find propabilities of having a sequence in a list, by using frequencies. The case is that you will bet on an increase when the last event had an increased and bet on derease when the last ...
1
vote
0answers
54 views

Moving two Spheres in the Opposite Direction [closed]

We know that we can achieve to a box contained two spheres by the code: Graphics3D[Table[Sphere[{i, Mod[i^2, 10], Mod[i^3, 12]}], {i, 2}]] How can the left ...
1
vote
2answers
74 views

Problem with exporting lists to Excel

When I use the form Export["file", list, "Table"] to export a list to Excel, I get columns of lists. I want my Excel sheet to have each list element in a separate ...
6
votes
7answers
316 views

A problem involving classification of data

Toady, I encountered a problem while trying to classify certain data. I have the coordinates of six points. ...
2
votes
2answers
90 views

Specify column width while exporting

I am trying to export a set of data into a file but I can not force mathematica to keep a certain width for each column. For example, when I export a table: ...
0
votes
0answers
54 views

Maximum and mean of a multi-variate function over a restricted lattice

I have a function Q, and I want to find the maximum value, the corresponding arguments for the maximum value, and the mean over a certain range of arguments. I ...
1
vote
1answer
59 views

Why does one Monitor expression work while another fails?

I have a (somewhat involved) function f[x?NumericQ, y?NumericQ] and for some reason it behaves differently when given a Table ...
0
votes
1answer
56 views

Extract a smaller matrix from a bigger one [closed]

May be duplicate, but, how it is possible to make a matrix or table of smaller dimensions, from a matrix with bigger dimensions. I mean, one may want to extract a 25*25 table from a 25*50 matrix. I ...
0
votes
2answers
57 views

Import array indices from Excel

In an Excel file, I have some numbers which I will use as the indices of arrays. I want to read those numbers and assign them as the array indices in Mathematica. For instance, in Excel I have and ...
0
votes
1answer
55 views

Import a data stored in EXCEL and change it to a Table [closed]

I have an EXCEL file in which large amount of numbers is stored in a column in the first sheet, like data in the column A of the sheet1 of excel file. When I apply the Import function; the data is ...
0
votes
0answers
33 views

noninteger indices for tables

Is it bad programming practice to use non-integer values to label data tables? For example, Do[data[dBx, Bz] = Table[{x,f[dBx,Bz]}, {dBx, .1, .5, .05}, {Bz, .4, 1.5, .1}] instead of introducing ...
2
votes
1answer
60 views

Table with some editable cells

I have a table: I want it to be editable only where the zeros appear. I read this post Generating an editable table that can be used as input because it's almost exactly what I want, but I couln't ...
3
votes
8answers
347 views

How to add a column to a table that counts the number of times the lines appear?

I am at a complete loss at this. I have a table with 2 columns and n lines. Some of the lines are repeated. What I want to do is add a new column that counts the number of repetitions of each line. ...
2
votes
2answers
106 views

Create a matrix of matrices using Band and ArrayFlatten [duplicate]

I can easily write a simple Band matrix using: SparseArray[{Band[{2, 1}] -> a}, {Dim, Dim}] where a is a number. Now, I ...
1
vote
2answers
119 views

dropping a row with at least one value larger than a particular value

So for instance I have M X N table. I want to drop any row which has an element larger than, say, one in the second or the third column. I guess I have to do some sort of pattern matching. But not ...
1
vote
1answer
55 views

Removing outermost braces

I want to calculate the Kronecker product of several matrices in different orders. the number of these matrices must be changeable. ...
2
votes
3answers
93 views

One-column table not properly displayed by TableForm

I want a table with a single column of data, and with headings along both the rows and the column. One might expect it to work like this: ...
0
votes
1answer
61 views

How do I save the values in a table? [closed]

I have written the following sequence. I would like to save the resulting values in a table such that I have a list of all the values at the end the For loop. How do I proceed? My goal is to sum up ...
2
votes
1answer
163 views
2
votes
1answer
103 views

Loop in solving multiple matrix calculation

I am wondering is there a way to use loop, like Do, For, to rewrite the last line in the code. I tried to use ...
0
votes
0answers
29 views

Table of values for functions with random variables [duplicate]

I'm trying to get a table of values for functions with random variables. First of all, i have a function like that: ...
1
vote
2answers
202 views

A fast way to compare interval

I have a list of intervall. Some of these intervals are disjoint, some are overlapped and some are included in others. To leave no ambiguity about my explanation, you can see the following examples: ...
0
votes
1answer
103 views

Factor vector out of a matrix

I am wondering how to factor a[1],a[2],...,a[4] out of sim so that I can write sim as the ...
0
votes
0answers
30 views

Adding columns of data to a matrix [duplicate]

I create a matrix of values using Table. Here's my code: ...
0
votes
0answers
70 views

scatterplot from 3d table

I am using this code: ...
0
votes
1answer
68 views

Strange behaviour of “Make Table” with exponential function

I am trying to create a simple interpolation of 1-Exp[-x^2] function, over the logarithmic grid, but I am stuck due to some unexpected behaviour: ...
0
votes
1answer
91 views

Dealing with nested lists

This question is strongly related to: Map and Apply a function on a nested list I am in a bit of a rut in terms of my MMA skills and looking to improve my coding. I've realized that rather than ...
4
votes
2answers
276 views

What is the Mathematica way of joining two tables?

Is there a special Mathematica way of joining tables of data together, so that I would get similar functionality as if I was running a database with sql? For example, I have one particular table ...
0
votes
1answer
48 views

Drop last element of parts of a list [duplicate]

just a simple question for now I guess: I have a list: list={{1, 2, 1}, {1, 10, 1}} I simply want to Drop the last element of the two entries of the list, that ...
1
vote
3answers
120 views

How to print horizontal lists in TableForm?

How to print the table with the first column as $\{1,2,3\}$ instead of $\begin{array}{c} 1 \\ 2 \\ 3 \\\end{array}$? ...
0
votes
1answer
47 views

Export data as XLS file

data = WeatherData["WMO44207", "Temperature", {{1950}, {2013}}] This list contains 11400 records ... date,temperature value .... I want to export all records as ...
4
votes
2answers
211 views

Labeling a grid

I have m = {{0, -1, -2, -3, -4}, {1, 0, -1, -2, -3}, {2, 1, 0, -1, -2}, {3, 2, 1, 0, -1}, {4, 3, 2, 1, 0}}; And a grid ...
0
votes
0answers
23 views

How to put the values/points in a loop into a plot? [duplicate]

I've already make the do loop..it has 200 points..how am i going to put those points into a plot?do i need to make a list@table before doing the plot?here's my loop example, ...