# Compare numel of multiple variables

2 views (last 30 days)
Grzegorz Lippe on 4 Mar 2022
Commented: Stephen23 on 4 Mar 2022
How can I compare the sizes of multiple variables easyly?
%%
a = [1 2 3 4] ;
b = [1 2 3 4] ;
c = [1 2 3 4] ;
all_numel_equal = numel(a) == numel(b) == numel(c) % Evaluates to false, because 4 == 4 == 4
% evaluates to true == 4
% first not so elegant possiblitly:
all_numel_equal = (numel(a) == numel(b)) &&...
(numel(a) == numel(c))
% second ugly possiblity:
try
[a(:) b(:) c(:)] ;
all_numel_equal = true
catch
all_numel_equal = false
end

Matt J on 4 Mar 2022
Edited: Matt J on 4 Mar 2022
a = [1 2 3] ;
b = [1 2 3 4] ;
c = [1 2 3 4] ;
isequal(numel(a),numel(b),numel(c))
ans = logical
0

Matt J on 4 Mar 2022
Edited: Matt J on 4 Mar 2022
a = [1 2 3] ;
b = [1 2 3 4] ;
c = [1 2 3 4] ;
L=cellfun(@numel,{a,b,c});
all_numel_equal = all(L==L(1))
all_numel_equal = logical
0
Stephen23 on 4 Mar 2022
~any(diff(cellfun(@numel,{a,b,c})))

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