delete elements from the given array

for example. an array X is given, which is X=[1,2,3,4,5,6] how to delete all even numbers of this array except the last even number(6)? In other words, how to make this array look like X=[1,3,5,6]?

Answer 1

[Ameer Hamza]

Try this

X=[1,2,3,4,5,6];

idx = find(mod(X,2)==0);
X(idx(1:end-1)) = []

[Oksi Moon]

Thank you very much!

[Stephan]

X=[1,2,3,4,5,6,7]
idx = find(mod(X,2)==0);
X(idx(1:end-1)) = []

results in:

X =

     1     2     3     4     5     6     7


X =

     1     3     5     6     7

you stated:

"...what if I have 7 elements [1,2,3,4,5,6,7] and I still need to get [1,3,5,6]. i need to leave the last even number. not just the last number"

Answer 2

[Stephan]

X(2:2:end-1) = []

[Oksi Moon]

thank you! what if I have 7 elements [1,2,3,4,5,6,7] and I still need to get [1,3,5,6]. i need to leave the last even number. not just the last number

[Stephan]

X=[1,2,3,4,5,6,7]
idx = find(mod(X,2)==0,1,'last');
X(idx+1:end) = [];
X(2:2:idx-1) = []

gives:

X =

     1     2     3     4     5     6     7


X =

     1     3     5     6