MATLAB: Find at least 5 consecutive values above a certain threshold in a vector

consecutive threshold

I have a vector

M = [3,3,5,7,8,8,9,7,4,3,2,1,7,6,5,2,2,2];

I want to find at least 5 consecutive values which are above the threshold, which is 4. So the vector will be

N = [5,7,8,8,9,7]

Could anyone help me with this? Thanks.

mask = M > 4;
starts = strfind([0 mask], [0 1 1 1 1 1]);
stops = strfind([mask 0], [1 1 1 1 1 0]);
N = M(starts(1) : stops(1))

Try this:

After = repelem(A', 1, 2)
After =
     1     1     4     4
     2     2     5     5
     3     3     6     6

The repelem function was introduced in R2015a.

Use num2cell. it is easy

a = [1 2 3 4; 123 4 5 6; 52 5 4 7; 2 5 8 7];
b = num2cell(a,1)

b =

1×4 cell array

{4×1 double} {4×1 double} {4×1 double} {4×1 double}

is usefulll for other purpose

b = mat2cell(a.',[1 1 1 1])

b =

1×4 cell array

{4×1 double} {4×1 double} {4×1 double} {4×1 double}