Find the maximum value corresponding to the specific index

Dear Matlab Experts

I want to find the maximum values corresponding to the continuous 1 value groups. The data is like this format.

(1) continuous 1 value groups is found.

the code provided by Mr per isakson is like this. From the code, I got the start and end of index of continouos 1 values.

d = diff( c );

ixb = find( d == +1 ) + 1;

ixe = find( d == -1 );

%%

is_group = ixe >= ixb + 1;

[ ixb(is_group), ixe(is_group) ]

(2) I want to get is the corresponding maximum value among the continous 1 value groups. There are 3 continuous 1 values indexing from 2~5,10~11 and 13~14. The answer is 2234 which is within the second continuous 1 value groups 10~11.

Index Value

0 850

1 800

1 947

1 801

1 857

0 829

0 1569

1 2235

0 2169

1 2234

1 1557

0 962

1 838

1 774

If someone can help me on this task?

Thank you very much.

Best regards,

Answer 1

[David Hill]

Assuming a two column matrix

maX= max(yourMatrix(yourMatrix(:,1)==1,2));

[soe thiha]

Dear David

Thanks for your suggestion.

But, I need the maximum value corresponding to the continuous indexed 1 values.

There are 3 continuous 1 groups. I need to find the maximum value 2234 (not 2235) for this 3 groups.

Regards

[David Hill]

If you know the indexing:

maX = max(yourMatrix([2:5,10:11,13:14],2));

[soe thiha]

Dear Mr David

Thank you very much for your help and advice.

It helps me a lot.

Regards,