how to find witch points are under the line??i have a number of points that i define as a X,Y and i have wrotten the under steps.

hi every one

i have a number of points that i define as a X,Y and i have wrotten the under steps.

x = eldof(:,10); %%x=[0,0.5,240]

y = eldof(:,11);

plot(x, y, 'b.', 'MarkerSize', 5);

grid on;

% Make line

xRedLine =unique(x);

redLine = 60+10*exp((-(xRedLine-120).^2)/100);

hold on;

plot(xRedLine, redLine, 'r+-', 'LineWidth', 2, 'MarkerSize', 2);

%xlim([0 120]);

%ylim([0 60]);

% Find values less than the red line for each x and plot a red square around them

for k = 1 : length(x)

thisX = round(x(k))

index = find(thisX >= xRedLine);

if y(k) < redLine(index);

plot(thisX, y(k), 'rs', 'MarkerSize', 5);

end

end

now my answer is earned something like this

and as you see the area that shown with circle its false. and that area should verified with red but ...

what can i do for that??

please help me

thanks