As per my understanding, you wish to retrieve indices corresponding to values within a half hour interval, from a matrix which has date vectors as rows. This can be done using the "find" function, "&" logical operator, and the "and" function in a single command such as:
>> priceIdx=find(timeDbl(:,4)==9 & and(timeDbl(:,5)>30,timeDbl(:,5)<59 ))
I was able to retrieve row numbers containing values within the interval I specified. For example,
>> timeDbl =
2015 7 23 9 36 35
2015 7 23 9 28 39
2015 7 23 11 58 20
2015 7 23 9 56 20
>> priceIdx=find(timeDbl(:,4)==9 & and(timeDbl(:,5)>30,timeDbl(:,5)<59 ))
priceIdx =
1
4
Best Answer