mastercode function ver.

function points(x,y,names,m,b,vector,ab)
%x and y should be vectors of equal size containing the data.
%names should be a vector of equal size of x and y containing labels
%If labels are not desired, input 0.
%m and b are the slope and y-int. of the line of best fit.
%vector is the vector of x-axis values to be used for comparison.
%It is most likely the same vector as 'x'
%ab is either 'above' 'below' or 'both'.
%This indicates what points you would like marked: 
%above/below line of best fit, or both.
num = numel(vector);
plot(x,y,'ok')
hold on
lsline
A = zeros(1,num);
k = 1;
while k < (num + 1)
    A(k) = (m*vector(k) + b);
    k = k + 1;
end
p = 1;
while p < (num + 1)
    if strcmpi('above',ab) == 1
        if y(p) > A(p)
            xUp = x(p);
            yUp = y(p);
            namesUp = names(p);
            plot(xUp,yUp,'gx')
            labelpoints(xUp,yUp,namesUp,'NW',0.15,1,'Color','g')
            hold on
        end
        p = p + 1;
    elseif strcmpi('below',ab) == 1
        if y(p) < A(p)
            xUp = x(p);
            yUp = y(p);
            namesUp = names(p);
            plot(xUp,yUp,'rx')
            labelpoints(xUp,yUp,namesUp,'SE',0.15,1,'Color','r')
            hold on
        end
        p = p + 1;
    elseif strcmpi('both',ab) == 1
        if y(p) > A(p)
            xUp = x(p);
            yUp = y(p);
            namesUp = names(p);
            plot(xUp,yUp,'gx')
            labelpoints(xUp,yUp,namesUp,'NW',0.15,1,'Color','g')
            hold on
        elseif y(p) < A(p)
            xUp = x(p);
            yUp = y(p);
            namesUp = names(p);
            plot(xUp,yUp,'rx')
            labelpoints(xUp,yUp,namesUp,'SE',0.15,1,'Color','r')
            hold on
        end
        p = p + 1;
    end
end