random_split() 函数说明:
torch.utils.data.random_split(dataset, lengths, generator=<torch._C.Generator object>)
参数:
pytorch: random_split(),函数的具体定义如下:
def random_split(dataset, lengths):
r"""
Randomly split a dataset into non-overlapping new datasets of given lengths.
Arguments:
dataset (Dataset): Dataset to be split
lengths (sequence): lengths of splits to be produced
"""
if sum(lengths) != len(dataset):
raise ValueError("Sum of input lengths does not equal the length of the input dataset!")
indices = randperm(sum(lengths)).tolist()
return [Subset(dataset, indices[offset - length:offset]) for offset, length in zip(_accumulate(lengths), lengths)]
n_val = int(len(dataset) * val_percent)
n_train = len(dataset) - n_val
train_set, val_set = random_split(dataset, [n_train, n_val], generator=torch.Generator().manual_seed(0))
通过random_split()将数据分为训练集和验证集(随机)
原文地址:https://blog.csdn.net/weixin_42046845/article/details/134671637
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