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30 views

How to convert this equation to a second order one in f?

This is a third-order differential equation. Is it possible to convert it to a second-order one by integrating it or any other way? I think it could be done by multiplying by some additional factors. ...
34 views

Division algorithm problem that need to be solved by using procedure [closed]

My problem is; Write a procedure which finds the quotient and remainder of the division algorithm applied to two integers a and b. How can I use Floor to solve ...
53 views

Given: ...
286 views

How can I solve the Ramanujan problem by using Wolfram language? [closed]

The problem like this: find all integers n, 1 ≤ n ≤ 10, 000 such that n is the sum of two cubes of positive integers in two different ways. I want to solve the problem as a procedure in mathematica.
28 views

assigning integers to inner lists

Consider a asymmetric list which has been obtained from a NSolve command ...
70 views

Using the Range function with the Slot (#) function

I am writing a code to display longitudinal waves. I started with the following, filling the slots using the Range function. ...
33 views

Trying to extract the Eigen values and Eigen vector of a matrix

I have a Matrix A, which is a function of ω. I wanted to find the eigenvalues and eigenvectors of this matrix, how to do it. I have used the EigenSystem function ...
39 views

How to get Thick and Black contour line in 2d list contour plot?

I am trying to make contour plot of a 20*20 matrix using the function ListContourPlot. I want the contour curves to be thick and black at the same time. So I tried ...
40 views

Trying to define a function using indexed variables

I have a list of indexed variables, for example xx={x,x} and an expression which is a function of those indexed variables, say ...
39 views

Simulating a bicycle going around a circle

I want to simulate a bicycle moving around a circle. Instead of graphs and calculations, I want to almost see an actual simulation of this happening. How could I do this? I tried looking up ...
53 views

...
25 views

Deleting numbers from a list based on another longer list [closed]

I would like to delete all elements of a list that are equalled to any element found in a bigger list. For example, if I had A = {1,2,3,4,5} and B = {2,4,6,8,9,12} I would like to get C = {1,3,5} ...
33 views

Extracting values from a dataset column based on key from a different column

Take a small dataset, for example a sample of the Titanic data: ...
65 views

Is there a (simple!) way to convert all initialization cells of a document to normal cells?

I like to work with initialization cells. During the different stages of development of my notebooks, I however often need to change those. If they are scattered throughout the notebook, it is ...
61 views

Reduce to Piecewise

There are some similar posts on SE, but none of them seems to exactly address my issue. I need to integrate a rather complicated function (over $x>1$) separately over two domains defined as ...
840 views

Flatten an array

I have obtained an array of results as follows ...
24 views

I can't exit Full Screen when I am pressing F12 [closed]

I use Dell Inspiron 15-5577. When I am holding F12, the screen just brighten. The software version I use is 12.0.0.0
29 views

Sets of k expressions, being k a variable

I need to write something like Table[Subscript[A,i] = i, {i,5}] in order to define a set of expressions. All is OK with this, but if I try to left the number of expressions as a variable k... Table[...
86 views

How to get the nth value of a function with arbitrary number of arguments

I know that I can define a function of a List and get the nth argument like: f[x_List]:=x[]+x[] What if the argument of ...
27 views

Are these TransformedDistributions identical?

If A1 and A2 are independent random variables, and B1 and B2 are as well, then are the following TransformedDistributions the same? ...
26 views

Printing problem Mathematica v12

After installing MMA v12 (Windos 7) I cannot print (using Print) on several printers, which work fine together with other programs. If a use ...
38 views

Error using MaTeX, MaTeX::texerr : LaTeX Error: Missing \begin{document}

I've managed to install MateX with all prerequisites. pdflatex and GhostScript paths are correctly specified. I am able to load it into Mathematica. However, a simple command such as MaTeX[x^2] gives ...
28 views

Changing Vertex Color and Coordinates From a list or vertex

I'm making a visualisation of an email network of a company. Each vertex represents a person and vertex color represents their position(BOD,CEO,manager,leader). The edges' Thickness according to ...
23 views

How to select multi vectors with particular condition

I have a matrix as: a01={{225., 1, 2, 3, 4}, {225.5, 2, 3, 4, 5}, {226., 3, 4, 5, 6}, {226.5, 4,5,6,7}} And I want to choose head: ...
28 views

Mmma connectivity . parquet. python

Is there any way to exchange data in binary format with python ? Example. a) I have data in Mmma and want to export them to make use in python ... b) Want to use Parquet format
117 views