# alternate way , without ismember function

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Jogger on 8 Oct 2020
Commented: Star Strider on 8 Oct 2020
Hi
I am having problems in using the ismember function, so I want to replace ismember and I need help in replacing the function.
Below is example code
INData = [
0.0120849609375
0.014190673828125
0.015838623046875
0.01214599609375
0.012481689453125
0.0123291015625
0.621002197265625
0.017181396484375
0.015167236328125
0.015350341796875
0.014556884765625
0.01739501953125
0.621002197265625
0.023162841796875
0.017578125
0.01361083984375
0.01239013671875
0.012115478515625
0.012451171875
0.01702880859375
0.01214599609375
0.012725830078125
0.0125732421875
0.012603759765625
0.012359619140625
0.014190673828125
0.013214111328125
0.013427734375
0.01531982421875
0.621002197265625
0.01239013671875
0.013092041015625
0.017791748046875
0.015960693359375
];
dMark = [7 13 30];
s_data = ismember(1:size(INData(:,1),1),dMark);
s_data =
1×34 logical array
0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
I need help in replacing isemember function.
Thank you

Star Strider on 8 Oct 2020
The ismember function is doing exactly what you told it to do! What’s the problem?
Star Strider on 8 Oct 2020
As always, my pleasure!
This was an interesting problem!

### More Answers (1)

Ameer Hamza on 8 Oct 2020
An alternative approach
dMark = [7 13 30];
s_data = false(1, size(INData, 1));
s_data(dMark) = 1;
Jogger on 8 Oct 2020
Your interpretation is right s_data give right output!