Finding t that a max/min occurs at

I have a f(t) = [600x1] matrix and I need to find the t where the max and the min occur. I know how to find the max and min, but I am not sure how to then find what t these occured at. So if my max is 70, I need to find the t value that gives f(t) = 70. What is the best way to find t? Thanks!

[Windsor Konkwane]

perfect

Answer 1

[Image Analyst]

You need to use BOTH min(), max() AND find() to get ALL of the locations:

ft = randi(70, 600, 1); % Sample data
% Step 1: find the max and min values.
maxValue = max(ft)
minValue = min(ft)
% Step 2, find out what rows they occur at.
% NOTE: cannot use the second return value of max() and min() for this
% because it will return ONLY the first occurrence
% of the max or min, not ALL of them
indexesOfMax = find(ft == maxValue)
indexesOfMin = find(ft == minValue)

[Shawna Myatt]

Thank you! between the value code that was given earlier and the find command, I was able to figure it out.

[Image Analyst]

"Figure it out"? What was left to figure out?

This gave you very explicitly the answer of what indexes the maximum occurred at. Other than possibly renaming my variables, what changes needed to be made?

Answer 2

[madhan ravi]

[value,index]=max(f)
t(index)
[value,index]=min(f)
t(index)

[Shawna Myatt]

It doesn't look like I am getting the right values. The max and min are right, but the index and t(index) look wrong. Which of these should be my t value and what is the other equal to?

Thanks!

[madhan ravi]

v(t==100) % to find v when t is 100
value=max(v(t>=1 & t<=10))
value1=min(v(t>=10 & t<=20))
value2=max(v(t>=40 & t<=50))

[Shawna Myatt]

Thanks! Between this and the find command, I was able to figure it out.