nulls from mdev

[joshmyzie2]

When using mdev, I was producing a number of unexpected nulls. It seemsthat the definition is based on sqrt(avg(x^2) - avg(x)) without checkingthat the difference is non-negative before taking the square root.Example:q)5 mdev 10#1e-30 0 0 0 0 0 0 0 0n 0nIs there any reason not to change the definition of mdev from{sqrt mavg[x;y*y]-m*m:mavg[x;y:“f”$y]}to{sqrt 0f|mavg[x;y*y]-m*m:mavg[x;y:“f”$y]} ?Josh