how do i write a for loop to eliminate point under a certain value?

hi, i want to omit all points under a certain value for a series of plots as shown. would it be something like

for i=100:a 
    Ti_x=Ti(i,:);
if Ti(i,:)<==0.25

{how do i tell it to omit these points}

f6=figure;
plot(x_cntr,Ti_x,'*')
xlabel({'X/D'})
ylabel({'TI'})
title('Streamwise Turblence Intensity')

Answer 1

[Stephen23]

With basic indexing:

Ti_x(Ti_x<=0.25) = NaN

NaN values do not get plotted.