How to encompass a half-hour block of time?

Question

Cary 2015-7-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/230637-how-to-encompass-a-half-hour-block-of-time

编辑： Nitin Khola 2015-7-23

The code below finds the index of every timestamp at 3:30.

timeStr=cellstr(datestr(time));
timeDbl=datevec(timeStr);
times=and(timeDbl(:,4)==14,timeDbl(:,5)==30);
priceIdx=find(times);

How can I encompass/index a half hour block of time? This is what I'm trying to do.

times=and(timeDbl(:,4)==14,timeDbl(:,5)==30:59);

Any suggestions?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Nitin Khola 2015-7-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/230637-how-to-encompass-a-half-hour-block-of-time#answer_186967

编辑：Nitin Khola 2015-7-23

在 MATLAB Online 中打开

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 )) % interval of (9:30, 9:59)

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 ))  % interval of (9:30, 9:59)
priceIdx =
       1
       4