You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: pop_runica.m
    path of file: ./repos/eeglab/functions/popfunc
    
    the code of the file until where you have to start completion: % POP_RUNICA - Run an ICA decomposition of an EEG dataset using RUNICA, 
%                BINICA, or another ICA or other linear decomposition. 
% Usage:
%   >> OUT_EEG = pop_runica( EEG ); % pops-up a data entry window
%   >> OUT_EEG = pop_runica( EEG, 'key', 'val' ); % no pop_up
%
% Graphic interface:
%   "ICA algorithm to use" - [edit box] The ICA algorithm to use for 
%                 ICA decomposition. Command line equivalent:
    
function tmprank2 = getrank(tmpdata, pca_opt)
    
    tmprank = rank(tmpdata);
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %Here: alternate computation of the rank by Sven Hoffman
    %tmprank = rank(tmpdata(:,1:min(3000, size(tmpdata,2)))); old code
    covarianceMatrix = cov(tmpdata', 1);
    [~, D] = eig (covarianceMatrix);
    rankTolerance = 1e-7;
    tmprank2=sum (diag (D) > rankTolerance);
    if tmprank ~= tmprank2
        if nargin >= 2 && pca_opt ~= 0
            fprintf('Warning: fixing rank computation inconsistency (%d vs %d) most likely because running under Linux 64-bit Matlab, taking the minimum\n', tmprank, tmprank2);
        end