Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Favorites infavorites:mine
infavorites:1234
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with Search options user 368

Questions on the manipulation of matrices in Mathematica.

5
votes
Variation of Nasser's code (which I find a bit cleaner, although it is longer) f[i_, j_] /; i < j := 0 f[i_, j_] := i - j + 1 Array[f, {4, 4}] // MatrixForm For arbitrary values one could adapt thi …
answered Jul 29 '13 by sebhofer
4
votes
ArrayFlatten can be used as follows: a = {{1/2 l Sin[γ[t]], -(1/2) l Cos[γ[t]]}}; b = IdentityMatrix[2]; ArrayFlatten[{{a}, {b}}]
answered Nov 12 '15 by sebhofer
6
votes
Let me first start with a cleaned up version of your evol2: Clear@evol3 evol3[mat_, initial_, ti_, tf_] := Module[{dt = (tf - ti)/10, res = col[initial]}, Do[res = MatrixExp[-I*mat, res], {t, …
answered Nov 9 '15 by sebhofer