Questions on the use of the Table[] command and other functionality related to lists. Use [tag:matrix] for matrix algebra and related methods, and [tag:list-manipulation] for questions about transforming or operating on existing lists.

learn more… | top users | synonyms

33
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 ...
19
votes
5answers
921 views

Instruct a Table to only evaluate until a condition is fulfilled

I am looking for the way of building a Table of pairs of numbers in a fast way. My true table evaluates huge functions, and I see no way and reason to show those cumbersome expressions here. Let us ...
7
votes
3answers
403 views

How do I avoid scoping collisions of iterator variables?

Yesterday I had an issue that kept for quite a while. My code wasn't producing the right results. Now I know why and I am wondering how to avoid the issue in future. Consider the following code. ...
1
vote
3answers
2k views

How to create functions of arbitrary number of variables? [duplicate]

In the following code what would be the simplest way to generalize it to say some $N_f$ number of $z$ instead of just $z_1$ and $z_2$? ...
9
votes
2answers
469 views

Is there a Break[] equivalent for short-circuiting in Table?

I am running Mathematica 7. The following is admittedly a silly example, but suppose that I have a list list whose entries are either ...
1
vote
3answers
3k views

Importing multiple files using a for-loop

once again I am stuck solving a seemingly easy problem :( I would like to make a List of tables by importing data from several txt-Files. Importing the data into a table works so far and I am able to ...
12
votes
4answers
647 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 ...
11
votes
5answers
431 views

TableAlignments -> Left not working

Bug introduced in 7.0 or earlier and persisting through 10.1.0 or later For a very simple dataset TableAlignments->Left does not work: ...
3
votes
2answers
211 views

How do I display the plane of best fit in 3D?

I'm trying to display the plane of best fit in the same 3D-box. Currently, I have the following code which spits out a plot of the points in 3D. I want to have a plane of best fit, can Mathematica do ...
2
votes
2answers
118 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 ...
1
vote
1answer
484 views

Can Table be used inside Manipulate?

EDIT: CHanged the code. Please try again t see if it works well on our PCs. I am creating a simple Manipulate[] notebook. However when I place Table[] in the code, like: ...
1
vote
1answer
159 views

direct assignment to the element in a Table

I have already asked a related question here why set values in this way doesn't work? But I think I have to write the question which I encountered explicitly? ...
0
votes
1answer
332 views

Function to marginalize a table over given parameters

Let us say I have generated a table tab with entries {p1,..,pd,chi2[p1,..,pd]} of dimension ...
2
votes
2answers
257 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 ...
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 ...
10
votes
5answers
633 views

Relational joining of tables

A common thing to want to do with data is to combine it (at least I thought this was a common thing). In SQL there is the idea of table joins "select id,v1,v2 from A,B where A.id=B.id" kind of thing. ...
3
votes
1answer
243 views

How can I create a colour image using raw black and white data? (FITS data cube)

I have a data cube containing pictures of a galaxy across a thousand wavelengths. I want to take the data for the image slides in the red and blue parts of the spectrum, and have them represented in ...
12
votes
7answers
563 views

How to properly inject iterators into table? [duplicate]

Goofing off on a prior question, I was fiddling with other methods, which led me to the need to inject a constructed set of iterators into a table construct. Now, ...
5
votes
4answers
1k views

How can I format a table to look nice?

I have this code, but i would like to see the results well formated, How can I obtain a well formatted data with aligment?, similar to this one insted what i obatin, you can see here Here is ...
6
votes
5answers
579 views

What is the best way to draw a shaded table?

I'm trying to format a raster-style table with row and column headings and in which each cell is shaded according to the value in the cell, and the value of the cell is displayed in as text in a ...
3
votes
4answers
192 views

AccountingForm w/o significant figures

Basically I want to build a chart like something I would do in Excel. It should look like this: Here is the formula I'm using and what I've done so far ...
9
votes
2answers
275 views

Correct way to generate large data sets (i.e.forward yield curve )

I would like to generate a set of forward yield curve matrix of size 1000 x 100. First I defined my SparseArray of 1000 x100: ...
5
votes
2answers
244 views

Single Legend for a Table of Plots

For this toy problem ...
2
votes
1answer
50 views

Why isn't Table iterator value inserted in failed NIntegrate arguments?

Consider this simplest example: Table[{z, NIntegrate[f[x], {x, 0, z}]}, {z, {1}}] Here f is not defined, so ...
2
votes
3answers
213 views

how can I generate a sequence of assignments?

I want to make a sequence like follows r[1]= r[2]= r[3]= r[4]= .... r[n]= The above r[i] represents coordinates which I have ...
-2
votes
1answer
147 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 ...
5
votes
4answers
137 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 ...
5
votes
2answers
378 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 ...
5
votes
5answers
232 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} ...
4
votes
2answers
597 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 ...
4
votes
1answer
410 views

Create a table with inline conditions

I am trying to create a table with conditionals inline. For example, I'd like to create a 2 dimensional table like this: ...
3
votes
5answers
260 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 ...
3
votes
1answer
510 views

Exporting/Importing a Table of complex numbers

I'm generating a long table of list of the form: PN={{1,2,1+i},{3.5,2.6,2}...},{...},... Using: Export["PN.dat", PN, "Table"] ...
3
votes
1answer
316 views

Why can't Mathematica parallelize this?

The following code makes mathematica print "ParallelTable::nopar1: [...] cannot be parallelized; proceeding with sequential evaluation." ...
2
votes
5answers
125 views

Turning Pascal's Triangle 90 degrees counter clockwise

I have a function that returns a list containing sub-lists that have the numbers for each row in the list. (ex.{{1},{1,1},{1,2,1}}) If I was going to represent it regularly I would use table form and ...
2
votes
1answer
111 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 ...
2
votes
3answers
126 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: ...
2
votes
2answers
678 views

Get positions of all non zero matrix elements

I want to find all non zero elements of a table and I want to create a list that contains the name of the table the element was removed from, the position of the element, and the value of the element. ...
2
votes
2answers
175 views

Generating an editable table that can be used as input

Say I have a number $n_{max}$. I want a command to generate a table like 1 1 2 2 3 3 4 4 ... nmax nmax where the second column is editable, and this table can be ...
2
votes
2answers
207 views

Deleting parts of groups that do not have equal dates

Find the intersection of dates within the pair and remove the other dates & corresponding prices. Also keep the list in same format as it currently is in. Let me explain: Each stock has closing ...
2
votes
2answers
196 views

Replacing all values in a table > $T$ [duplicate]

I want to generate a table of Euclidean distances from the points in a list to a given point, e.g.: ...
1
vote
1answer
113 views

Table shifting bug?

I use Mathematica for calculation of coordinates in format {x[t], y[t]}. For this purpose, I wrote Module T...
1
vote
2answers
144 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 ...
1
vote
2answers
142 views

`Slot` (#) interfering with evaluation

In the following I am using one function makeFunc to assemble two functions a[t] and b[t] to ...
1
vote
2answers
202 views

How to sort Table/Matrix including legend(Labellings)

I want to sort table including its legend for graph I have table similar to M1 M2 M3 1 5 2 3 1 4 4 2 -10 5 7 11 6 -2 1 ...
1
vote
1answer
446 views

plotting output from FindRoot

I am an R user and am totally new to Mathematica. I am trying to find the roots of a system of two equations over a series of paramter values and plot the results. I can do the computation but would ...
1
vote
2answers
2k views

Font size in PlotLegends, using Table to generate the list in the legend

I am currently trying to get to graph with several functions as below. My problem is that I cannot change the font size in the legend (authomatically generated numbers by "Table" function). This code ...
0
votes
0answers
65 views

Matrix iteration failing after second step

I am calculating 11x6 matrix using different logics as in below code. Problem is in Do loop in below code where I have two different criteria to update matrix "fd". I am expecting logic in IF which ...
0
votes
2answers
175 views

Combining graphics & lists / tables

I have: created with: ...