Can't Remove Rows

I am trying to remove rows using the following code.

% Hypothetical read in from an excel spreadsheet
% 20 rows of values and only first 10 rows have useable data
A = randi([0,30],10,10)
A (10:20,10) = zeros


%% Determining Useable Data

% Array dimension
[row,col] = size(A)

% Row count for element values
rowCount = 0

% Assess array A for numeric values in elements of column 1
for i=1:row
    if A(i,1) ~= 0
        %logAss(i,1) = 1
        rowCount = rowCount + 1
    else
        
    end
end

% Delete rows of no value

A(rowCount:row,col) = []

% Where following error thrown:

% "A null assignment can have only one non-colon index.
% Error in Test1 (line 32)
% A(rowCount:row,col) = []"

How do I redimension the array using variables?

Answer 1

[Jeroen vD]

Instead of

A(rowCount:row,col) = []

use

A(rowCount:row, :) = []

[Jay]

Thank you Jeroen.