Find the lowest values in vector array.

2017 4 18
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更新时间：2017 4 20
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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')

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Rik
Rik 2017-4-18
What do you mean with "all lowest values"? There is only 1 lowest value. Or do you mean the local minima?
Ahmed Mostfa
Ahmed Mostfa 2017-4-18
yes, all local minimum I need. How can I do it please?
Ahmed Mostfa
Ahmed Mostfa 2017-4-18
I only could found one value, how can I find all lower values?
Rik
Rik 2017-4-18
Maybe this answer on a similar question might help.

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Jan
Jan 2017-4-18

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Do you have the Signal Processing Toolbox? Then:
[Minima, Index] = findpeaks(-simple2)

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Ahmed Mostfa
Ahmed Mostfa 2017-4-19
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
Jan 2017-4-20
编辑：Jan 2017-4-20
[Minima, Index] = findpeaks(-simple2)
plot(Index, simple2(Index), '*r')
or
plot(Index, -Minima, '*r')

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