Index of scalar NaNs in cell array

Question

Consider the following cell array:

test = cell(2,2);
test(1,:) = {NaN};
test{2,1} = [1,2,3];
test{2,2} = [4,NaN,6];

I would like to identify those cells which directly consist of an NaN scalar. I tried isnan in conjunction with cellfun, however, that identifies all NaNs within a vector as well.

nanIdx = cellfun(@isnan, test, 'UniformOutput', false)

As a result I am looking for nanIdx = [true,true ; false,false] of type logical.

rahnema1 · Accepted Answer · 2018-01-26 09:25:44Z

2

You can define the anonymous function as @(x)isscalar(x) && isnan(x):

nanIdx = cellfun(@(x)isscalar(x) && isnan(x), test)

More conditions can be provided using any of is* functions.

edited Jan 26, 2018 at 9:25

answered Jan 26, 2018 at 9:17

rahnema1

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3 Comments

Ander Biguri Over a year ago

beautiful one liners

Andi Over a year ago

Indeed, very nice solution. Thanks a lot :-)

rahnema1 Over a year ago

Glad If it can help!

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