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1
vote
2answers
29 views

Listplot x axis - Using tranpose of two tables?

I'm trying to augment the x axis of a listplot to fit the number of steps. Secondly, since there are a large number of steps (50), there will be 50 ticks which will make the graph messy. How do I get ...
2
votes
2answers
57 views

Problem with NumberForm when exporting

I have a two-part question regarding NumberForm First question In my attempt at answering this i stumbled upon a strange behavior by NumberForm when the final result is exported. Lets say I ...
5
votes
4answers
152 views

Getting the number of frequency in a list

I want to know how to make a tally board in a specific data appear in a list. E.G. n ={1,2,1,4,3,1,4,5,3,2,4,5,6,3,4,2,2,5,2} and get ...
4
votes
4answers
98 views

Syntax for Table with a pure function

I have: g = #1^2 + a #2^3 / #1 & Now I wish to make a Table evaluating this from 1 ...
4
votes
3answers
275 views

How to create a table?

I have looked here at the forum and on the mathematica documentation center though still couldn't get it to work. I have two lists ...
0
votes
0answers
38 views

Using indexed variables to make a vector — Iteration limits exceeded [closed]

I am trying to do an implicit numerical integration scheme for the 1D heat equation. This basically amounts to diagonalizing a matrix equation at every time-step of the simulation. So in order to do ...
14
votes
3answers
1k views

WYSIWYG table creating and editing

In Microsoft Office OneNote 2010, creating and editing tables is easy. There are simple toolbar controls for creating tables: , and editing them once they exist: . My question is, what's an easy ...
0
votes
2answers
73 views

Replace $z$ with interpolated function and plotting

I start off with this equation $z(x,y) = sin(xy)$. I create an interpolation from $0 < x < 5$ and $0 < y < 5$. I then use this interpolation on a simple function $w(x,y) = x + y + z(x,y)$ ...
-2
votes
1answer
112 views

Creating a table giving the statistics of random polynomials [closed]

I already have a formula for generating random polynomials as well as for counting the real roots of every polynomial (see my previous question). But now I face the problem of how to organize the ...
1
vote
1answer
122 views

Parallel numerically integrated function can't be plotted [closed]

I've been working on a problem where I need to integrate a function numerically. The function is quite complex and it takes almost an hour for Mathematica to make a plot. To speed the process up I ...
4
votes
2answers
176 views
31
votes
6answers
2k views

How to visualize/edit a big matrix as a table?

Is it possible to visualize/edit a big matrix as a table ? I often end up exporting/copying big tables to Excel for seeing them, but I would prefer to stay in Mathematica and have a similar view as in ...
11
votes
4answers
463 views

Calling Table with custom iterator

I often find myself in situations where I, for example, need to build a table for some expression, but want to set the number of points rather then the step size, so the code ends up looking like this ...
1
vote
0answers
40 views

Problem with importing numbers resulting from an executed file in Mathematica

I am running Mathematica 10 and I have a mathematica file, MBdebug.m, that contains the line val = Import["! ./MBpart1ep0", "Table"]; MBpart1ep0 is an ...
0
votes
1answer
50 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
0answers
52 views

Make a table of changes in US coinage

I thought of an innovative use of Mathematica/Alpha that I think Stephen Wolfram would really love, but I can't figure out how to get it to work. The idea is to make a table that would chart the ...
3
votes
2answers
233 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 ...
1
vote
1answer
61 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 ...
2
votes
2answers
109 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 ...
3
votes
5answers
156 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
84 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
60 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
200 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
39 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
92 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 ...
1
vote
2answers
83 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 ...
10
votes
5answers
364 views

TableAlignments -> Left not working

Bug present in versions 7 through 10.0.0. For a very simple dataset TableAlignments->Left does not work: ...
1
vote
4answers
145 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 $z_{max}(x,y)$ ...
4
votes
3answers
130 views

TableForm with a title

My question is rather simple. I want to put a title into a table. For example, consider a list with depth two and a title ...
1
vote
2answers
53 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
105 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
151 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}]], ...
5
votes
5answers
209 views

How to make a table of $\sum_{i=1}^n$?

I want to create a table of $\displaystyle \sum_{i=1}^n i^k$ for $1\le k\le 5$. The output I want to obtain is a TeXForm output as follows. \begin{align} ...
2
votes
3answers
74 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
55 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
83 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
330 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
93 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 ...
0
votes
1answer
60 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
59 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
62 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
64 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 ...
0
votes
1answer
71 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: ...
3
votes
8answers
351 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
123 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 ...