how do I get the names of the attributes?

load iris.dat
iris(1,1)

gives me the first value of the first column

how do I access the name of the attribute?

Answer 1

[mizuki]

iris.dat in Fuzzy Logic Toolbox does not have class information (name of the attribute). So, you need to add class information by yourself like:

setosa = iris((iris(:,5)==1),:);        % data for setosa
versicolor = iris((iris(:,5)==2),:);    % data for versicolor
virginica = iris((iris(:,5)==3),:);      % data for virginica

If you have Statistics and Machine Learning Toolbox, use fisheriris instead.

load fisheriris

A variable meas contains features and Species is class information.