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Aug
17
comment how to efficiently apply function to all pairs of a set (and collect the results)
@michar - I find Tuples to be pretty quick: but note, it has n*n pairs - things like 2 -> 2 are possible, thus the self-loops in the picture above.
Aug
17
revised Problem with Financial Data
formatted code
Aug
17
answered how to efficiently apply function to all pairs of a set (and collect the results)
Aug
17
revised how to efficiently apply function to all pairs of a set (and collect the results)
added 16 characters in body
Aug
16
comment copy paste merging expressions
Welcome to Mathematica.SE, Amatya! I have formatted your post so it is a bit easier to read. If you would like to know how to do this yourself, this page explains how.
Aug
16
revised copy paste merging expressions
added 20 characters in body
Aug
16
revised Strange behaviour of Reduce for Mod[x,1]
formatted code
Aug
16
comment Strange behaviour of Reduce for Mod[x,1]
Welcome to Mathematica @ StackExchange! Please consider registering your account so that any upvotes you get on this question are added to those you might get on future questions and answers. That way, over time you will be able to do more on the site (post graphics, edit things, etc). Also, I have formatted your code to make it easier to read. This link will show you how it's done for next time. And welcome again!
Aug
16
answered How to align rotated tick labels?
Aug
16
comment How to align rotated tick labels?
Related: mathematica.stackexchange.com/q/4791/8
Aug
15
reviewed Leave Open SetDirectory - predefined directory possible?
Aug
15
reviewed Leave Open Image of input and output cells is not exported correctly
Aug
15
reviewed Leave Open Subtle difference in conditional rules placement
Aug
15
reviewed Leave Open Mathematica - Dynamic - ListPlot - baseline
Aug
15
reviewed Close Why is the CTRL + / not working?
Aug
15
reviewed Leave Open I failed to solve a set of one-dimension fluid mechanics PDEs with NDSolve
Aug
15
revised Reversing one axis in Plot3D
added 6 characters in body
Aug
15
revised Running an initialization cell on Mathematica start up
added 54 characters in body
Aug
15
revised Running an initialization cell on Mathematica start up
added 40 characters in body; edited title
Aug
15
comment Is there a clean way to extract the subspaces invariant under a list of matrices?
Thanks for this thorough answer. I don't think there is a problem given that you have provided a Mathematica implementation. Is the expected output of the first block of code a tensor? Using A[j] matrices of random normal numbers, with $n=3$ and $m=4$ I get a 9*3*3 tensor.