Simple inverse indexing question...

Question

Mats 2012-4-19

Suppose you have;

t = 1:0.1:10;

x = rand(1,100);

ind = [1:10,60:61,80:100];

I want a single expression which gives all the other indexes of t or x other than 'ind'. In this case [11:59,62:79].

This can't be hard, but i just cannot seem to find the answer. The simplified reason for which this is needed is:

figure();

plot(t(ind),x(ind),'r');

plot(t(~ind),x(~ind),'b');

And I don't want new variables like x2 = x; x2(ind) = [];

Thank you in advance!

Answer 1

Mats 2012-4-19

Somehow the response from Andrei Bobrov got lost, but he had the answer!

setdiff(find(x),ind) of setdiff(1:length(x),ind)