Problem with ismember evaluating values in matrix

I have an array with the following values:

EEG.event(1).type = 202
EEG.event(2).type = 24
EEG.event(3).type = 101
respMarkers = [10 20 101 102];

When I run this statement:

(~ismember([EEG.event(3).type], respMarkers))

I expect the result to be false, but it comes out true. Since 101 is contained within the respMarkers variable, why does this occur?

Answer 1

[Image Analyst]

It comes out false for me, as expected because ismember([EEG.event(3).type], respMarkers) is true. Are you sure you're looking at the correct expression with the ~ tilde in the right place?

[Ryan]

Yes, I'm sure. Could the variable type interfere with the result?

whos respMarkers Name Size Bytes Class Attributes

respMarkers      1x4                32  double

[Ryan]

I just typed in just the code I gave you, and it comes out false as well. Thus, EEG has a different variable type for my actual data (I'm loading in EEG data from a data file). What can I do to fix this?

[Image Analyst]

See the FAQ: http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F

Cast to integers, or else compare to within a tolerance if you're going to compare floating point numbers (double, single).