matrix - Use if clause in arrayfun in Octave/Matlab -


is possible use "if" in arrayfun following in octave?

a = [ 1 2; 3 4]; arrayfun(@(x) if x>=2 1 else 0 end,  a)

and octave complains:

>>> arrayfun(@(x) if x>=2 1 else 0 end, a)                                      ^

is if clause allowed in arrayfun?

in octave can't use if/else statements in inline or anonymous function in normal way. can define function in it's own file or subfunction this:

function = testif(x)      if x>=2         = 1;      else          = 0;      end  end

and call arrayfun this: 

arrayfun(@testif,a) ans =     0   1    1   1

or can use work around inline function: 

iif = @(varargin) varargin{2 * find([varargin{1:2:end}], 1, ...                                      'first')}();  arrayfun(iif, >= 2, 1, true, 0) ans =     0   1    1   1

there's more information here.


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