Matlab extract paretotail parameters using lowerparams function

I have estimated paretotails for 16 time series using the paretotails function in Matlab. I would now like to produce 2 matrices which contain the lower and upper tail parameters for the 16 time series (thus have the dimensions 16,2), which I have produced in the paretotails function. I have tried to implement this using a for loop. Unfortunately, only the parameters for the last time series (#16) are displayed in the pre-filled matrices for the parameters. The code I have provided below is runnable and produces my problem.

Extreme Value Theory 

t = trnd(3,780,16); 
nIndices = 16; 

% 3.1 Tail Estimation 
nPoints      = 100;        % # of sampled points in each region of the CDF
tailFraction = 0.05;       % Decimal fraction of residuals allocated to each tail

tails = cell(nIndices,1);  
tails_Lower_params = zeros(nIndices,2)
tails_Upper_params = zeros(nIndices,2)

for ind1 = 1:nIndices
    tails{ind1} = paretotails(t(:,ind1), tailFraction, 1 - tailFraction, 'kernel');
    tails_Lower_params(nIndices,:) =  lowerparams(tails{ind1});
    tails_Upper_params(nIndices,:) =  upperparams(tails{ind1});
end

I would be very happy for any Hints on what I am missing here!

Best, Carolin