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: createImageMask.m
    path of file: ./repos/autonomous-navigation-ugv/CreatingMaps/Data
    
    the code of the file until where you have to start completion: function [BW,maskedRGBImage] = createImageMask(RGB)
%createMask  Threshold RGB image using auto-generated code from colorThresholder app.
%  [BW,MASKEDRGBIMAGE] = createMask(RGB) thresholds image RGB using
%  auto-generated code from the colorThresholder app. The 
    
function J = rotateColorSpace(I)

% Translate the data to the mean of the current image within app
shiftVec = [0.091376 0.051557 0.609949];
I = I - shiftVec;
I = [I ones(size(I,1),1)]';

% Apply transformation matrix
tMat = [-0.433425 -0.406693 0.000000 0.705211;
    -0.003791 0.004773 0.825002 -0.500499;
    0.374154 -0.471070 0.008360 3.653497;
    0.000000 0.000000 0.000000 1.000000];

J = (tMat*I)';
end