# How do we shift the cell of a variable and replace it by NaN?

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Anu on 25 Jan 2022
Commented: Anu on 25 Jan 2022
I have a variable x. The x contains a large number of values. When I open x in the workspace, I see the first value is in the 1st cell, second value is in the second cell and so on. I want to shift the the values from celll 1 to cell 5 and replace the first five cells with NaN. How will we do this?
For example, x = 20, 30, 40, 50, 60
I want to shift these values, therefore my new x after shifting will be NaN NaN NaN NaN NaN 20, 30, 40, 50, 60
Any help will really be appreciated.
Thanks.

DGM on 25 Jan 2022
It depends what you mean by "shift". Consider the two examples:
x = 20:20:200
x = 1×10
20 40 60 80 100 120 140 160 180 200
a = [NaN(1,5) x] % simply concatenate
a = 1×15
NaN NaN NaN NaN NaN 20 40 60 80 100 120 140 160 180 200
b = [NaN(1,5) x(1:end-5)] % shift right and fill with NaN
b = 1×10
NaN NaN NaN NaN NaN 20 40 60 80 100
Anu on 25 Jan 2022
thanks so much, @DGM. For now, I want to do the first option, but good to know the later one for the future.