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.

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1
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2answers
249 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: ...
1
vote
1answer
330 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
38 views

Adding columns of data to a matrix [duplicate]

I create a matrix of values using Table. Here's my code: ...
1
vote
0answers
136 views

scatterplot from 3d table

I am using this code: ...
0
votes
1answer
89 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
156 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
857 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
95 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
254 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
124 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 ...
5
votes
2answers
564 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
28 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, ...
0
votes
1answer
34 views

How to use more/less black textcolor in function of the value of numbers in a table?

A few weeks ago, I viewed in the Mathematica Documentation any page withmultiple examples using diferent styles dpending on the value of the number in position (i,j), but I can´t remember... and I ...
2
votes
2answers
987 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. ...
1
vote
1answer
109 views

How to create list of delayed rules? [duplicate]

I am trying to make a ButtonBar that prints the name of the card in question. What I have so far is as follows: ...
1
vote
1answer
85 views

Optimizing evaluation time

I have the following code and it takes like foreeeeever to evaulate: ...
0
votes
0answers
69 views

How to compute variances from a matrix/table

I have created a matrix/table with an imported dataset. I want to know what the variance is for 3 values at a time but across 68 columns. I would like to do this in an automated way rather than 1 set ...
2
votes
2answers
403 views

Automatically highlight certain cells

I am looking for a method to highlight certain cells in a table/Grid based on meeting some user defined conditions. As an example: ...
2
votes
1answer
349 views

Export CSV from tables

I am reading my csv which looks like: float,float,float,integer,boolean I read it with: ...
0
votes
1answer
89 views

Creating If statements programmatically [duplicate]

I want to write an algorithm that returns a sequence of numbers, starting from a specified point but stopping once a criterion has been reached. For example ...
6
votes
3answers
504 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 ...
4
votes
3answers
1k views

Using If statements internal to Table [duplicate]

Is there a way to use If statements with Table? To give a kind of ridiculous example that captures to spirit of what I'm trying ...
1
vote
2answers
156 views

`Slot` (#) interfering with evaluation

In the following I am using one function makeFunc to assemble two functions a[t] and b[t] to ...
2
votes
3answers
178 views

Extracing information from a table

I am new to Mathematica. I have created a table of real numbers. I want to create a new table that contains the set of values of $i$ such that, in my original table, the $i$th entry is greater than ...
0
votes
1answer
78 views

Implementation of a Hanning filter

I'm implementing a package for in-house signal processing. I wrote here a quite trivial function implementing a Hanning windowing of the signal. ...
0
votes
2answers
222 views

Selecting index position of data from a table that is less than a certain value

I have a table of numbers with a few thousand entries, and I'm trying to find the first index that is less than a particular value. An example of the table I'm working on is as follows: ...
4
votes
2answers
219 views

How to make sure Table or Do only runs through specific values?

I often need to generate or run through very large numbers of integers (we're talking {i, 1, 10^9} and higher) and want to add certain integers to a list, say ...
2
votes
2answers
1k views

Parametric plot of multiple graphs on the same axes

I'm trying to plot on a single axes system multiple graphs but ran into a problem when tryinf to label my graphs. Here's what I've used so far Mathematica code: ...
0
votes
1answer
164 views

Slow evaluation of complicated Table

I have a system of recursive equations x[t+1]:=f[x[t],p[t-1],a[t],a[t-1]]; p[t+1]:=g[p[t],x[t-1],a[t],a[t-1]]; a[t+1]:=h[x[t],p[t],a[t],a[t-1]]; I want to ...
3
votes
2answers
400 views

Converting from TableForm to Grid

I wonder if there is an easy way to convert from TableForm to Grid. I have an existing data format that uses the Table function that I’d like to prettify…. Let’s setup a nested table as follows: ...
0
votes
1answer
88 views

Using Derivative with list in curly brackets

I'd like to make a formula for a sum containing Derivative where the number of arguments in the latter depends on an input parameter n. Also involved is a list ...
2
votes
2answers
87 views

How do I get the heading elements from the TableForm option TableHeadings?

The following, table = TableForm[ConstantArray[0, {3, 3}], TableAlignments -> Right, TableHeadings -> {None, {"One", "Two", "Three"}}] generates ...
2
votes
2answers
595 views

Fast way to extract data from a list

I used data=Table[{i,f[i]},{i,1,n}] to produce a list, here n is greater than 2^20 = 1048576. The function f(N) runs in time ...
5
votes
2answers
305 views

How to create this list more elegantly

There is list containing some $(i,j)$ values of indices. Now i want to create a matrix of dimension n $\times$ m whose entries are 1 for the indices corresponding to the given list otherwise its ...
5
votes
2answers
355 views

Single Legend for a Table of Plots

For this toy problem ...
2
votes
2answers
226 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 ...
0
votes
2answers
232 views

Define a function on a parameter argument set to zero

Say I have an expression (matrix) that depends on several variables. f= {{a, b+c},{2a-b^2,c^5+a b}} I want to define new matrices with the single parameter ...
3
votes
1answer
100 views

Table doesn't replace inside conditionals (If, Which) [duplicate]

This: Table[If[cond, y], {y, 1, 3}] outputs this: {If[cond, y], If[cond, y], If[cond, y]} The ...
1
vote
3answers
150 views

More elegant/efficient solution to browse through an array

I have an array of lists and want to correlate every list with each other like this: ...
-1
votes
1answer
530 views

Mathematica Semilog (LogLinearPlot) using x,y points from table [duplicate]

I am trying to use the LogLinearPlot in Mathematica 9 to create an x-axis only logarithmic plot that looks like this (Based on N^1.85 graphing paper) http://pingfire.com/ What it does is model a ...
5
votes
5answers
246 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} ...
1
vote
1answer
127 views

Testing a List inside of an Table if it is != 0 [duplicate]

I'm new to mathematica so I hope this is not a too stupid question, but I couldn't find a solution in the mathematica documentation. I've got a normal table, initialized with "0" as entries. In the ...
2
votes
0answers
104 views

Want explanation of when different looping constructs are appropriate [duplicate]

For example when would you use a Do loop over a For loop? For which tasks would you use Map, ...
1
vote
1answer
791 views

How to convert the following list into a LaTeX table?

How to convert the output of the following code In[43]:= Func[x_]:=Select[Range[x],Total[IntegerDigits[#]^3]==#&]; Func[1000] which is Out[44]= ...
1
vote
2answers
260 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 ...
3
votes
4answers
245 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 ...
1
vote
3answers
250 views

Table iteration over two ranges

I am trying to create a Table where the iterator has two ranges with different iteration steps. Let's consider a simple example: I want to find the square of the ...
6
votes
4answers
447 views

A fast way to compute arrays avoiding If or Which

I found out that if I have to calculate huge arrays with most of the elements being zero( let's say each row has 10000 elements and only 8 are non zero) and the non zero elements' positions being ...
0
votes
0answers
43 views

Store results of inequality [duplicate]

I eveluated some values using Reduce commend and I store them in a Table ...