17 lines
453 B
Python
17 lines
453 B
Python
|
import torch
|
||
|
|
|
||
|
|
def obtain_accuracy(output, target, topk=(1,)):
|
||
|
|
"""Computes the precision@k for the specified values of k"""
|
||
|
|
maxk = max(topk)
|
||
|
|
batch_size = target.size(0)
|
||
|
|
|
||
|
|
_, pred = output.topk(maxk, 1, True, True)
|
||
|
|
pred = pred.t()
|
||
|
|
correct = pred.eq(target.view(1, -1).expand_as(pred))
|
||
|
|
|
||
|
|
res = []
|
||
|
|
for k in topk:
|
||
|
|
correct_k = correct[:k].view(-1).float().sum(0, keepdim=True)
|
||
|
|
res.append(correct_k.mul_(100.0 / batch_size))
|
||
|
|
return res
|