我使用SciPy在Python中编写了一个脚本,对信号执行短时傅立叶变换。当我用一千个时间点的信号运行它时,运行正常。当我用一百万个时间点的信号运行它时,它冻结了我的计算机(计算机没有响应,如果正在播放音频,则计算机输出跳过和循环的嗡嗡声);这种情况一直发生在我尝试过的三次。我编写的脚本需要花费数小时,但我从未遇到过真正冻结计算机的脚本。知道为什么吗?该脚本发布在下面:
import scipy as sp
from scipy import fftpack
def STFT(signal, seconds_per_sample, window_seconds, min_Hz):
window_samples = int(window_seconds/seconds_per_sample) + 1
signal_samples = len(signal)
if signal_samples <= window_samples:
length = max(signal_samples, int(1/(seconds_per_sample*min_Hz)) + 1)
return sp.array([0]), fftpack.fftshift(fftpack.fftfreq(length, seconds_per_sample)), fftpack.fftshift(fftpack.fft(signal, n = length))
else:
length = max(window_samples, int(1/(seconds_per_sample*min_Hz)) + 1)
frequency = fftpack.fftshift(fftpack.fftfreq(length, seconds_per_sample))
time = []
FTs = []
for i in range(signal_samples - window_samples):
time.append(seconds_per_sample*i)
FTs.append(fftpack.fftshift(fftpack.fft(signal[i:i + window_samples], n = length)))
return sp.array(time), frequency, sp.array(FTs)
答案 0 :(得分:-1)
消耗了太多的RAM,请参阅Why does a simple python script crash my system
程序运行的过程在进程内存中存储用于计算的数组和变量,这是ram
您可以通过强制程序使用硬盘内存来解决此问题。
有关变通办法(shelve
,...),请参阅以下链接
memory usage, how to free memory
Python large variable RAM usage
I need to free up RAM by storing a Python dictionary on the hard drive, not in RAM. Is it possible?