First element greater than

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I have a set of data containing x,

How can i extract only the first value greater than x in this set.

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Answer 1

Star Strider 2022-8-17

在 MATLAB Online 中打开

1 个投票

Try simething like this —

v = randi(9, 1, 20)
v = 1×20
     5     4     2     5     2     6     7     2     6     6     3     8     5     8     7     4     7     4     8     7
x = 7
x = 7
first_x_idx = find(v > x,1,'first')
first_x_idx = 12
Result = v(first_x_idx)
Result = 8

.

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AAZ 2022-8-17

I have v=[-0.1011 -0.0712 -0.0562] , and x=-0.0599, so i try to use the code above but it give for the first value lower than x is -0.1011 but i want -0.0721.

So how can i solve it

Star Strider 2022-8-17

在 MATLAB Online 中打开

I am confused. I am not certain what you want.

I am not certain how robust this will be for other vectors, however here it gives the result you want —

v = [-0.1011 -0.0712 -0.0562];
x = -0.0599;
first_x_idx = interp1(v,(1:numel(v)),x,'previous')
first_x_idx = 2
Result = v(first_x_idx)
Result = -0.0712

.

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First element greater than

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