38 questions linked to/from Flatten command: matrix as second argument
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### Decomposing a list into several two coordinate lists

How can the following list can be decomposed into separate two coordinate lists? list = {{1, {0}}, {2, {0}}, {3, {-2, 0, 2}}, {4, {-2, 0, 2}}, {5, {-2, 0, 2}}}; ...
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### Trouble in understanding Table [closed]

Even after, not only seeing, but understanding on Mathematica SE and also using Table. I am afraid, if I still understand it. Here is one example, which I couldn't ...
383 views

### How to riffle matrices

I have four matrices ...
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### List extraction

Given the following list: ...
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### Adding the data of different tables

I have three tables of data say t1 = {{1, 2}, {2, 3}, {3, 4}}; t2 = {{1, 3}, {2, 3}, {3, 5}}; t3 = {{1, 3}, {2, 3}}; First I want to add ...
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### Plotting how sunrise times change over the year

I created a somewhat lengthy Python code to show how the time of sunrise varies over a year, resulting in the following figure (daylight savings were disregarded): The dataset can be found here. The ...
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### Riffle two matrices COLUMNWISE; where boh matices have the same number of rows

I need to "riffle" two matrices; COLUMNWISE. Say that we have: ...
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### How to remove extra levels in list [duplicate]

My question is how to turn a 4-level matrix (notice one extra level) A = {{{{1, 2, 3}, {4, 5, 6}}}, {{{7, 8, 9}, {10, 11, 12}}}}; into the following: ...
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### Combining the entries of two lists [closed]

I have two lists {a, b, c, d, e} and {1, 2, 3, 4, 5}. I want to creat a new list of tuples as follows ...
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### Transpose two uneven lists [duplicate]

I am trying to plot two lists using the ListPlot command. I need to merge two lists. The two lists I have are: ...
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### Collecting specific Lists of data in coordinate form

Note: This might be trivial for many of the users but i am new to mathematica so i don't know!!! Question: Suppose i have three list of data as follows: ...
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### How to build a matrix from a set of vectors and other matrices using ArrayFlatten

I want to build a 6 by 3 matrix, from the following: one vector is 3 by 1, then a matrix, which is 3 by 2. These will go to the top 3 rows. Now the bottom 3 rows, I'll have 3 vectors each is 3 by 1. ...
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### How to understand the extensional usage of Flatten? [duplicate]

Recently, I have been reading Mathematica program that written by many advanced Mathematica user, like Mr.Wizard, J.M., Kuba,etc to improve my programming capacity In the On generalizing Partition[] (...
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### Inserting rows of one matrix into rows of another matrix sequentially

I have two matrices M1 and M2. Both have same number of columns but different number of rows. I want to make a new matrix M which should have 1st row form M1, second row form M2, third row form M1, ...
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### Understanding Transpose

It is very likely that it is my lack of math skills that is showing up here. However, I think Transpose is such an important function that I need to master it. So I ...
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### How to convert multidimensional matrix into regular matrix?

I have this multidimensional matrix: {{{{a1, a2}, {a3, a4}}, {{b1, b2}, {b3, b4}}}, {{{c1, c2}, {c3, c4}}, {{d1, d2}, {d3, d4}}}} I would like to convert it into ...
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### How can I thread lists of different sizes?

What I need is the equivalent of Maple's zip(+, A, B, 0). Sure I can get it with: ...
848 views

### Translating MATLAB's cell2mat into Mathematica

How I can define a function in Mathematica such that it acts same as the cell2mat command in MATLAB? Example (in MATLAB): ...
One way to evaluate the following sums is combining Table and Sum: $u_{abcd} = \sum_{e=1}^3 v_{aeb}w_{ced}$ $q_{ab} = \sum_{d,e=1}^3 v_{d e a}w_{deb}$ It will look like ...