how to find the index?

Hi all,

I am facing a trouble in extracting the indecies from the 3rd dimension of matrix using 'find' function.

for example : time is 251 * 28 * 20, where 20 is the time.

index = find(time>=datenum(2019,02,01)& time<=datenum(2019,02,07));

any help will be apprecited

Answer 1

[Ameer Hamza]

By default, find() return linear indexes. To convert them to the dimension subscripts, you ind2sub()

index = find(time>=datenum(2019,02,01)& time<=datenum(2019,02,07));
[r, c, p] = ind2sub(size(time), index)

'p' is location in 3rd dimension.

[Lilya]

thank you Ameer, but i get an empty index output :(

Should i run it over the third dim?

[Ameer Hamza]

How the matrix 'time' is defined? Can you share it in a .mat file.

[Lilya]

It is attached.

[Ameer Hamza]

I don't get empty output on running this code. The output on my system is attached.

[Lilya]

after checking with what I have, it is working!!

The problem is it was taking another set.

Thank you very much Ameer.