当我几天前更新 Android Studio 时，Android Emulator 停止工作。我尝试打开一个空白活动，但模拟器无法正常工作。
所有 SDK 工具都已安装和更新。以下是我运行空白活动时的事件日志和空白活动（Hello World！）的 Logcat。
Event Log: 1/1/2018 4:43 PM Gradle sync started
4:43 PM Project setup started
4:44 PM Gradle sync finished in 34s 677ms
4:44 PM Executing tasks: [:app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar]
4:45 PM Gradle build finished in 1m 28s 392ms
5:00 PM Unable to run 'adb': null
5:00 PM 'C:\Media\platform-tools\adb.exe start-server' failed -- run manually if necessary
5:00 PM * daemon not running; starting now at tcp:5037
5:00 PM * daemon started …我的自由度小于数据集中的行数。为什么我有错误“估计的自由度不足”。我该怎么做才能解决此错误？
我试图减少 中的值differenced = difference(X,11)，但它仍然显示错误。
dataset, validation = series[0:split_point], series[split_point:]
print('Dataset %d, Validation %d' % (len(dataset), len(validation)))
dataset.to_csv('dataset.csv')
validation.to_csv('validation.csv')
from pandas import Series
from statsmodels.tsa.arima_model import ARIMA
import numpy
# load dataset
series = Series.from_csv('dataset.csv', header=None)
series = series.iloc[1:]
series.head()
series.shape
from pandas import Series
from statsmodels.tsa.arima_model import ARIMA
import numpy
# create a differenced series
def difference(dataset, interval=1):
diff = list()
for i in range(interval+1, len(dataset)):
value = int(dataset[i]) - int(dataset[i - interval])
diff.append(value)
return numpy.array(diff)
# …