Trimmed Mean with Percentage Limit in Python?

Question

I am trying to calculate the trimmed mean, which excludes the outliers, of an array.

I found there is a module called scipy.stats.tmean, but it req

Answer 1

Here's a manual implementation using floor from the math library...

def trimMean(tlist,tperc):
    removeN = int(math.floor(len(tlist) * tperc / 2))
    tlist.sort()
    if removeN > 0: tlist = tlist[removeN:-removeN]
    return reduce(lambda a,b : a+b, tlist) / float(len(tlist))