How to find index range of range of values in an array

I have an array of one row and 163495 columns. The values in this array range from 0-160. I am trying to find the indices that the values are from 69-72. When I use the find x==69, it computes out an empty array.

[jess Kapin]

It works for any integers (0 and 160 in this case) but I cannot use it for any non-integers

Answer 1

[Are Mjaavatten]

i = find(x>=69 & x<=72);;

[jess Kapin]

this results in: i = 1×0 empty double row vector

and when I click on the vector it just says val =

and the rest is blank.

I think this may be because they are not integers? So they are not exactly 69 and 72?

[Are Mjaavatten]

My suggestion should work for both integers and non-integers. As a demonstration, try:

y = 60:0.3:80;
i = find(y>=69 & y<=72)
y(i)

Your result seems to indicate that x contains no values in the specified range.

Are you sure x contains what you think? Try, e.g.;

x(1:100)

to see if the values look right.