How to have an empty space in a vector for operations

I would like to have a vector with an blank space, not a NaN, simply a blank space. Because then I need to take the average and I would like for it to not take into account that space, for example:

x = [10 20 30 40 50 70] %(as you can see, it is missing the 60, but it has a length of 7 values)

y = [ 20 40 60 80 100 120 140] %(length of 7 values)

First, would like to know how to write that x vector.

Then I want to take the average of both vectors as:

xy_avg = mean([x,y])

so that it yeilds:

xy_avg = [ 15 30 45 60 75 120 105] %(the 120 was averaged with the blank space and the answer was just 120)

Please, I cannot have it as NaN, it has to be literally empty blank space or position, without reducing the length of the vector.

thanks in advance!

Answer 1

[Matt J]

I would like to have a vector with an blank space, not a NaN, simply a blank space.

There is no such thing as a "blank space" in a matrix or vector. However, inserting a NaN will do what you want if you provide an 'omitnan' flag.

x = [10 20 30 40 50  nan   70];   %(as you can see, it is missing the 60, but it has a length of 7 values)
y = [ 20 40 60 80 100 120 140];   %(length of 7 values)

mean([x;y],'omitnan')

ans = 1×7

15 30 45 60 75 120 105

[Alfredo Scigliani]

Oh I see, well this works too so thank you so much!!