# Tagged Questions

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.

122 views

### Table with condition

I have 2 lists of numbers A = Range[16, 65] and B = Range[10, 16]. I want to form all possible combinations $(a,b)$ of the ...
35 views

### 3D listplot, for a given table

I have a table of 4 data, my first problem is how can I choose one region in which just one of these variables is constant and the listplot3D the other 3 variables? I need to do this for at several ...
75 views

### Getting directly a packed array of repeated packed arrays

Consider this code: Needs["Developer`"]; N@Range[5]; PackedArrayQ@% Table[%%, 5]; PackedArrayQ@% which prints True, ...
66 views

### fill in a table with some words letters

I have a list of words list={"ingenuous", "forgotten", "tree", "supercomput", "hundred"} How can I put the letters of each word in an element of a table such as ...
65 views

### How to animate ListPointPlot3D from table?

I have a text file which is the following format: 1159, 2209, 19, 141 2169, 1827, 23, 54 Which I import, sort and gather using: ...
61 views

### How to convert a Number to String for Export a Table

I am generating a table with 4 columns, wheras only the columns 3 and 4 have the same length. ...
81 views

### efficient writing, matlab vs mathematica [closed]

I would like to implement in mathematica, this simple matlab loop: c(1)=5; for i=2:10 c(i,:)=c0*i; end The point is that pos has an initial value and updates ...
37 views

### Fast way to export large amount of data in “Table” format

I have about a million 3D points, say data = Table[{1. x, 1. y, 0.}, {x, 1000}, {y, 10^3}]~Flatten~1; I want to visualize them, but ...
35 views

### Control output in mathematica

I'm producing a set of coordinates for every iteration in a simulation and saving it into a txt file in the following way: ...
31 views

### Size of headings for a table with graphs

I want to change the size of the heading of a table that includes graphs and am having no luck. The command I am currently using is ...
60 views

### Create a table indexed form a list giving a the index specifications

I need to create a table indexed form a list. e.g.: list={{i, 3}, {j, 4}}; would give the table Table[..., {i,3}, {j,4}]; ...
153 views

### Smoothing out data points in a ListDensityPlot

I stumbled upon this problem when I was trying to make some nice smooth ListDensityPlots of my numerical data. In short, my problem is that I let Mathematica plot two copies of basically the exact ...
76 views

### Speed differences between Table, Replace, Array, Map, and AssociationMap

EDIT: Actually, it looks like part of this is bogus—Array doesn't actually work on this input (I'm often a little shaky on what kind of input, exactly, works for ...
63 views

### RegionPlot error

I'm trying to represent the following table using the command regionplot. The rectangle (0,0), (0.5,0), (0,1),(0.5,1) should be covered, however it is not. Does anyone know what the problem is? Thank ...
93 views

### remove unevaluated cells from table

I have created a table Tv where each row is of the form {x, y, Iv[x,y]} where Iv is some complicated numerical integral and <...
68 views

### Export Table to Quicktime MOV Animation

I'm tying to export a table of images to a quicktime movie with a set duration (in this example, 12.67 seconds) ...
22 views

### Dynamically constructing symbolic tensors

Is there any way to construct tensor of any given dimension d and rank r with symbolic entries? i.e., instead of manually constructing one as Table[T[i,j,k],{i,1,10},{i,1,10},{i,1,10}] for d=3 and r=...
53 views

### Constructing tensors with arbitrary rank and dimension [closed]

How can I create a tensor with arbitrary rank n and m components in each dimension? I am looking for a command in which I insert n and m and it spits out the corresponding tensor with random entries (...
44 views

### Evaluating Root forms in a Table [closed]

When I put a Root form in table, the parameters of the Root form don't evaluate. I don't know how I can indexed values substituted into root form in the table to get have numeric output. ...
52 views

### Use If condition with ListPlot

Here is my code to use If condition with PLot: ...
164 views

### How to correctly implement in a new function the scoping behavior of Table, Sum and other commands that use Block to localize iterators?

It is documented that "Block is automatically used to localize values of iterators in iteration constructs such as Do, Sum, and Table." Therefore the dummy index (iterator) in a Sum is shielded ...
138 views

### Table and IF statement

I want to make a table to get a nbyn matrix. However, the diagonal are divided by zero. For example: n = 5; Table[1/(Sin[i] - Sin[j]), {i, 1., n}, {j, 1, n}] I ...
126 views

### Plotting a table with many y values

I'm trying to plot a bifurcation map for a Lorenz System. I have a function (called estables in the code that follows) which, for a certain value r, returns the ...
56 views

### How can use Table for two functions obtained from NDSolve? [closed]

I have obtained a numerical solution using NDSolve for two functions a(x) and b(x). how do I use Table to make a list of a(x) vs b(x) values. is it simply Table[{a(x),b(x)},{x,0,100}] or should I use ...
81 views

### Table with programmatically specified number of iterators in Compile

Compare two ways of computing a table of values of a multivariable Gaussian: ...
92 views

### Accessing the elements in a table is slower than calculating each time?

This is a follow-up of How to accelerate combinations and sum calculations here? I have tried all tricks but when N reaches 35 the time is still intimidating in a 16-core server, which is far better ...
27 views

### Partial Sum of Binary Sequence not Working

I have the following code: ...
48 views

### How to write a similar “for loop” with table?

I have a code to replace the z coordinate of one point A(x,y,0) on the xy plane: ...
62 views

### Matching a Table and a List and building a new Table

I have a Table which includes {Numbers, Probabilities}. For example A= {{1,0.5},{2,0.25}, {3,0.1},{4,0.9}……{100,0.1}}. Put attention that the numbers are 1,2….100 in order. I have a List of random ...
180 views

### Drop in nested tables?

I want to drop a specified number of elements from a 'table ...
140 views

### Find the length of the intersection of two lists including duplicates

I have 2 Lists. The first one includes all the numbers from 1 to 10. listA={1,2,3,4,5,6,7,8,9,10} The second includes ...
77 views

### issue with Animate

I want to make a animation based on the dataset like data = Flatten[Table[{x, y, x^2 - y^2}, {x, -3, 3}, {y, -3, 3}], 1]; I show this data using a ListPlot3D. <...
137 views

### Alternative forms to Table for iterating over replacement rules

I have a multivariate polynomial x. I get coefficients of various monomials using CoefficientRules, which returns a list of ...
55 views

### Export a plot to Excel [closed]

I know questions similar to this have been asked before but I couldn't figure it out. These are my hypothetical lines: ...
53 views

### What makes imaginary parts show up?

If I define a function using alpha[y_, d_] := 2 ArcCos[1 - (2 y)/d] Then if $y$ and $d$ are equal, the result is $2\pi$ : ...
22 views

### How to extract limits number of control points out of an equation

I am working on generating a table of control points: Table[x^2 + y^2 + z^2 == 1, {x, -2, 2}, {y, -2, 2}, {z, 2, -2}] I am getting a whole bunch of points but I ...
71 views

### Function Evaluation in Table [closed]

Apologies in advance: this is a really basic question, and I am sure it has been answered, but I don't know enough mathematica to even find the answer. I have a differential equation I want to solve....
61 views

### Multiple Sets of Data

I would like to plot multiple sets of x and y data on the same plot with a legend. This is the code I am using right now: ...
66 views

### Append[] is not working for empty list [duplicate]

I am trying to create an empty list and add an element but the list is not being populated. My code ...
70 views

34 views

### How to output values created by a nested for loop into table/ matrix form

I have successfully created the values i want, however i need to form them into a table. I need to create this table one row at a time, so the first 24 values would be the the first row, values 25-49 ...
78 views

### Plotting a table with varying step sizes

how can I plot the below green curve? Is there any way I could manipulate the step sizes? This is my current code: ...
32 views

### How Can I combine the equations' results in a table without “x->” [closed]

For example: I have a series of functions: F[x_,o_]=x+o And I want to combine the result into a table with o=0.3,0.6,0.9.. ...
22 views

### Define nonzero variables Varyx = z_xy from table with dimensions x,y and values z_xy

I'm trying to do the following. I have a table, call it TransTable. To give an example ...