How do I find variable values for functions?
5 views (last 30 days)
Show older comments
How do I use the find function to solve for a variable? I have an equation involving height and time and I want to find the value for time when the height y equals 0. I created a vector for time already.
0 Comments
Answers (1)
Thorsten
on 16 Sep 2015
Use logical indexing:
time_where_height_is_zero = time(height == 0)
1 Comment
Walter Roberson
on 16 Sep 2015
Caution: if there are no points where height is exactly 0 then this will produce an empty answer. If you have a 0 crossing, such as if adjacent entries are 1e-7 and -9.99e-15 then using the above will only notice that none of the answers are exactly 0 and will not notice that the value went "through" 0.
Basically, using the "find function" is usually not a good idea to find the root of an equation.
See Also
Categories
Find more on Matrix Indexing 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!