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Creating an ordered list of vectors

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Zach
Zach il 31 Mag 2011
I'm looking to create a list of vectors arbitrary in length. I was looking for something along the lines of: iterations=___ % some arbitrary number
for i=1:iterations vi=[1 2 3 4]; end
Hoping this would create the vectors v1, v2, v3, v4 ... which are all the same vector [1 2 3 4].

Risposta accettata

Walter Roberson
Walter Roberson il 31 Mag 2011
Please do not do that. Please read this FAQ
  3 Commenti
Walter Roberson
Walter Roberson il 31 Mag 2011
Generating full variable names is nearly always trouble. Use cell arrays or use a structure with dynamic field names.
Walter Roberson
Walter Roberson il 31 Mag 2011
T1 = cellstr(num2str((1:iterations).','v%d')).';
T2 = repmat({[1 2 3 4]},1,iterations);
T = [T1;T2];
VVars = struct(T{:});
Then use VVars.v1, VVars.v2, VVars.(sprintf('v%d',192)) and so on.

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Più risposte (2)

Jan
Jan il 31 Mag 2011
Use a CELL instead:
v = cell(1, iterations);
v(:) = {1:4}
Now you can use v{1} instead of v1. It is always better (nicer, safer, faster) to use an index as index, instead of hiding the index in the name of the variable.

Paulo Silva
Paulo Silva il 31 Mag 2011
v=perms(1:4);
Now instead of having v1,v2... you have v(1),v(2)...
  1 Commento
Jan
Jan il 31 Mag 2011
Why PERMS? The OP looks for v1=[1,2,3,4] etc.

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