if statements concerning vectors

"if only 2 probabilties are desired, then entries 3 to 10 of swtNPVProb (a 10X1 vector) should be set to NaN"

How do we do this in MATLAB???????

Answer 1

[Sean de Wolski]

if probabilitiesWanted == 2
   swtNPVProb(3:10) = nan
end