find function with floating points number
4 views (last 30 days)
Show older comments
distances=[100.2545 120.6632;200.8588 220.4465]
points_id=[{'p1'} {'p2'};{'p3'} {'p4'}]
pointfind = @(d) points_id(find(distances == d));
p = pointfind(120.6632)
%it gives
p1 =
Empty cell array: 0-by-1
%this function only works with integers but I need to work with floating points number.
0 Comments
Accepted Answer
Star Strider
on 8 May 2014
This revision of pointfind should work:
pointfind = @(d) points_id(find(fix(distances*10^(length(num2str(rem(d,1)))-2))/(10^(length(num2str(rem(d,1)))-2)) == d));
(It obviously all goes on one line, although it wraps here.)
You are dealing with differences in precision between the values stored in distances and the precision in the argument ‘d’ you present to pointfind. The revised version of pointfind truncates the elements of distances to the precision of ‘d’ before it does the comparison. It works with decimal fractions now.
0 Comments
More Answers (1)
See Also
Categories
Find more on Logical in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!