Find the lowest values in vector array.

I would like to find only the lowest values in the vector and plot them along with origin signal. Here is what I did, but couldn't show the two lowest values in this example. So the goal is to find all lowest values. Not the maximum lowest one.

load('freeFall_1.txt')
freeFall=freeFall_1(:);
x=freeFall(1:100)
window_size2=4
simple2 = tsmovavg(x,'s',window_size2,1);
[M,I] = min(simple2,[],2)
figure(6)
plot(simple2)
hold on
plot(M,I,'o')

[Rik]

What do you mean with "all lowest values"? There is only 1 lowest value. Or do you mean the local minima?

[Ahmed Mostfa]

yes, all local minimum I need. How can I do it please?

[Ahmed Mostfa]

I only could found one value, how can I find all lower values?

[Rik]

Maybe this answer on a similar question might help.

Answer 1

[Jan]

Do you have the Signal Processing Toolbox? Then:

[Minima, Index] = findpeaks(-simple2)

[Ahmed Mostfa]

It works, thanks a lot. I knew this function before, but the sign change it to lower minima. But the plot doesn't show me the points with the origin one. Best answer. Thanks for you again.

figure(6)
plot(simple2)
hold on
%plot(I,M)
[Minima, Index] = findpeaks(-simple2)
plot(Index,Minima,'*r')

[Jan]

[Minima, Index] = findpeaks(-simple2)
plot(Index, simple2(Index), '*r')

or

plot(Index, -Minima, '*r')