How do you remove rows from tall arrays?

For normal arrays, I would usually use the following code to remove the rows that I did not want.

array(1:100,) = [];

However, I get the following error and can not remove the rows.

For A(m,n,...) = [], m must be either a colon (:) or a tall logical vector.

[Stephen23]

Did you try using a tall logical vector?

[R]

I did not understand how to implement that when deleting the first 100 rows

Answer 1

[Edric Ellis]

As the error message states, the only way to remove specific rows from a tall array is with a logical vector. In other words, the following is valid:

t = tall(rand(100,1));

Starting parallel pool (parpool) using the 'local' profile ...
Connected to the parallel pool (number of workers: 2).

t(t < 0.2) = []

t =

  M×1 tall double column vector

    0.9291
    0.4580
    0.8203
    0.9105
    0.2477
    0.8635
    0.5471
    0.4856
      :
      :

In your particular case, instead of deleting elements, you can instead simply select the remainder of the array:

t = tall(rand(1000, 1));
t2 = t(101:end)

t2 =

  M×1 tall double column vector

    ?
    ?
    ?
    :
    :