CODEWITHSUNDEEP
pythonarrayssorting
Frank
Frank

Reputation: 671

Argsort returns negative values in reverse order

So I have an 2d array where the first column consists of floats ranging between -1.0 and 1.0. I want to sort the array based on the first column, from lowest to highest, this way:

data[0,data[0,:].argsort()]

But the problem is that the negative values are sorted from highest to lowest value, so -0.26 comes before -0.56, while the positive values are sorted from lowest to highest, 0.26 before 0.56 for example.

Why is this happening and how can I get the correct results, that is that also the negative values are listed from lowest to largest value?

Upvotes: 2

Views: 1979

Answers (1)

HYRY
HYRY

Reputation: 97331

Your array is a string array, so you need to convert it to float array first:

data = data.astype(float)
data[0,data[0,:].argsort()]

Upvotes: 3

Related Questions