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0
votes
0answers
35 views

How to avoid losing the done part of `Table` when stopping it? [duplicate]

Often, when I use Table, it takes too long to compute all the elements of the would-be table. I then stop it with Alt+. and ...
1
vote
0answers
49 views

Problem with ParallelTable in using externaly defined iterator [closed]

In order to reduce my computation time, I'm making some tests with parallel computation, especially with ParallelTable. Here is a simple code : ...
1
vote
1answer
103 views

Constructing new lists using Table

I tried to modify an old notebook to show a spreadsheet style output in a table. I am not getting any errors when it runs, so I think the data I am gathering and the new variables I added, ...
1
vote
1answer
85 views

Noninteger indices for tables

Is it bad programming practice to use non-integer values to label data tables? For example, ...
0
votes
1answer
111 views

Block matrix and calculate it's inverse

How to define the following block matrix $$ A=\begin{bmatrix} H-G_1 & -G_1 & \ldots & -G_1 \\ -G_2 & H-G_2 & \ldots & -G_2 \\ \vdots & \ldots & \vdots & \vdots ...
-2
votes
1answer
57 views

Create a matrix by crossing a list

I've a list L of elements. I want to create a matrix by laying each elements of L in both rows and columns where each ...
1
vote
2answers
54 views

How to Hold/Defer only one (only given) level?

Is it possible to Hold/Defer some of outer expressions, having evaluates inner ones? For example, I want to prepare a table of expression values, like this ...
1
vote
0answers
56 views

Is the “Table” function limited in number of elements it can compute? [closed]

i tried using "Table" to compute a list of 400,000 strings but the output takes forever to get. I have tried with smaller size of about 100 and i get results as fast as possible. But when the number ...
4
votes
2answers
122 views

Use the value of a cell in a table as the argument to a function

I just got Mathematica from my school and I'm trying to learn the basics. How could I use the value of a cell in a table (as in Insert->Table) and pass it as an argument to a function whose value is ...
1
vote
3answers
112 views

Applying Reduce[] to a table [duplicate]

I have a table for example: t = Table[k,{k,5}] which returns {1,2,3,4,5} and for every element in this table I want to check when it is $\leq 1 + a$. I ...
2
votes
1answer
59 views

Plot several columns of table with variable number of columns and display the legend accordingly

I use this command to plot all values from the 1st column of Table "results" against all values from the 2nd column: ListLinePlot[{results[[All, {1, 2}]]} Now, ...
0
votes
1answer
49 views

If works wrongly under Table or Sum [closed]

Table[If[i != j, 1/(j - i), 0], {i, 1, 5}] This line returns in Mathematica 9 the table with equations where i is still symbolic! Thanks for help! Sergey
3
votes
2answers
192 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
4answers
244 views

How do I find the position of the maximum value in each column of a table?

Given a table of values, I know how to find find maximum values, but how do I find the position of the maximum value in each column. For example, given ...
6
votes
5answers
575 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 ...
0
votes
0answers
50 views

Combination of interpolations doesn't work?

I have a table valued functions f[i_] and g[i_] and I need to plot various combinations of the function and its derivatives (for example: f''f, f'/f). I tried interpolating f[i_] to ->f[x] and ...
2
votes
3answers
73 views

How to manipulate one column of a table using the value in another column

Let's imagine I have the following table structure data = {{a, b}, {c, d}, {e, f}}; and I want to transform it into the following table ...
1
vote
2answers
79 views

replace two elements in a list with the sum of those two elements?

I have a list: G[3] = {2, 4, 2, 4, 2, 4, 2, 4, 2, 4} (there's a 3 in there for the 3rd Prime) Recursively defined by: ...
2
votes
5answers
185 views

Is there a way to use Table[] without having to calculate my function twice?

I'm trying to use Table[] more to be more in the spirit of Mathematica. So for example, I might replace this piece of code: ...
4
votes
2answers
180 views

Selecting y-values from xy coordinate grid

Suppose I have a table, u, which is created as follows: ...
1
vote
3answers
88 views

Iterations with Table?

Is the following code efficient? Has it any advantages? s[0] = Sqrt[2]; Table[s[t + 1] = s[t]^2, {t, 0, 4}] {2, 4, 16, 256, 65536} Should be efficient in the ...
1
vote
1answer
77 views

Exclude Infinite Value in Table

I'm creating a plot of a family of lines using their endpoints and plotting it like so: Graphics[Line[Table[{{x1, y1}, {x2, y2}}, {u, 0, 2 \[Pi], ustep}]]] Where ...
1
vote
2answers
75 views

How do you (sanely) fix up data in a csv/table?

I have data in a CSV file I've Import[]ed. Some of the data needs fixing up - date formats changed, data normalized, etc. After fixing up I'll insert it into an SQL database. My CSV file has ...
0
votes
1answer
58 views

Table of central binomial coefficients [closed]

I'm trying to construct a table of pairs {n, N[Log[cb[n]]]} for n from 0 through 250, and make a list plot of the results. So far I have this: ...
0
votes
1answer
74 views

Applying natural log to a table of values [closed]

I know this is a simple question, but I am new to Mathematica. How do I go about natural log to a table of values? I tried this: ...
1
vote
2answers
86 views

Generating a table with two entries for each i

Disclaimer: I'm not a mathematica expert, I have some programming experience but am still learning how to work mathematica. Also, some of the code from the first block here is not my own, ...
2
votes
3answers
121 views
4
votes
2answers
143 views

Inferring interest rate of a loan from payment

Be patient with me since this is my first post here. I don't know how to use the Math notation. I wish to compute the interest rate for an existing loan given the original loan amount, length of ...
0
votes
2answers
90 views

Getting table headings when creating a table with two variables

I have created a table, and I want the variables that run through to create it, as the headings in their respective place. So when my table is created by variable ...
0
votes
1answer
65 views

Solving at zeroes of a matrix - code only works for simple equation

I have a matrix of zeroes (True) and non-zeroes (False). The matrix is generated from a table of values of two other variables. I'm trying to observe how the solution for p3 changes with small ...
1
vote
1answer
80 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
1answer
192 views

Export CSV from tables

I am reading my csv which looks like: float,float,float,integer,boolean I read it with: ...
2
votes
1answer
94 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
112 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
214 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 ...
5
votes
4answers
135 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
342 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 ...
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
103 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
146 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
2answers
230 views
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 ...
12
votes
4answers
621 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
53 views

Problem with importing numbers resulting from an executed file in Mathematica [closed]

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
160 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
59 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
331 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
147 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 ...