• # 满足条件以及行上所有子序列值时屏蔽（不使用循环）

x = pd.DataFrame([[10, 20, 30, 11, 9], [13, 16, 21, 10, 9], [11, 5, 23, 50, 0]]) 我想一个面具，显示如果任何一行有一个值大于20。如果为True，则该行上的所有后续值也应为True。 e、 g第一行应改为： False, False, True, True, True 我不知道不使用循环怎么做。
• # How to compare all values of a list in python?

This is my code: ticker = 'NFLX' price = get_data(ticker, start_date='2020-01-01', end_date=None, index_as_date=bool, interval ='1d') price.to_csv(r'D:\Python Stuff\pythonProject\NFLX.csv') df = pd.read_csv('NFLX.csv') price_list = df['adjclose'] def SMA(...
• # 创建移动10的循环

我正在尝试创建两个for循环，第一个循环（k）通过一个10的窗口移动，例如，（1，10，20，…，90）直到90。第二个（l）在射程（1100）内。我在定义循环k时遇到问题。 X_train = np.row_stack([values[k][l] for k in range(1,100) for l in range(1, 100)]) 提前谢谢。
• # Python：用3个离散振幅绘制sin-wav

使用下面的代码，我可以创建一个符号波 def normalizedAmp(signalX, hz): '''extract correctly-normalized amplitude''' signalAmp = np.abs(signalX[0:len(hz)]) signalAmp[1:] = 2*signalAmp[1:] return signalAmp def sinWav(amp, freq, time, phase=0): return amp * ...
• # numpy数组的倒数[闭合]

Closed. This question needs details or clarity. It is not currently accepting answers. ...
• # 为什么在python中内置和定义FFT会得到不同的结果？

我有下面由numpy执行的fft2代码和由直接代码执行的2d fft代码。有人指出他们为什么不同吗？我的输入材料是rA。 def DFT_matrix(N): i, j = np.meshgrid(np.arange(N), np.arange(N)) omega = np.exp( - 2 * math.pi * 1J / N ) W = np.power( omega, i * j ) / np.sqrt(N) return W sizeM=40 rA=np.rando...
• # Issue retrieving AttributeError: 'tuple' object has no attribute 'ndim' while plotting a 3d graph

I am trying to plot a 3d wireframe plot from a csv file. Data in format first column x is CPU in percentage (range from 10-90%), second column y memory (range from 10-80%), in percentage and last column drop rate in percentage(range from 10-70%). Sample da...
• # Convert a column with a week number to a date

Is there any way the below code can be modified to convert an entire column? I have tried several formats and am unable to get this code to work on a column of data:- >>> import datetime >>> from dateutil.relativedelta import relativedelta >>> week = 40 >>...
• # How to turn a python script into an HTML website [closed]

Closed. This question needs to be more focused. It is not currently accepting answers. ...
• # Pass each data to function from multiple numpy [closed]

Closed. This question needs details or clarity. It is not currently accepting answers. ...
• # np.哪里多重条件？

我正在使用numpy添加到一个新的列中，该列来自另一个列。我相信只有2个参数是允许的，但我需要3个。用elif语句可以吗？ 我需要S3成为“VM”，CloudWatch成为“Disk”，其他一切都成为“Other” 我所拥有的： data_1 = pd.read_csv('data.csv') data_1['ADDED_COLUMN1'] = np.where(data_1.DIMENSION.isin(['S3', 'Glacier']), 'VM', 'Other') 输出： S3 ...
• # Kronnecker product on just two dimensions of 3 dimensional arrays

Suppose two matrices: a = np.array([[1,2], [3,4]]) b = np.array([[5,6], [7,8]]) which would give Kronecker product ab = np.kron(a,b): array([[ 1, 2, 2, 4], [ 3, 4, 6, 8], [ 3, 6, 4, 8], [ 9, 12, 12...
• # 如何用修改过的数据创建一个新的csv文件？（熊猫）

I want to create a new csv file with only modified datas. The input csv file is of example as 输入.csv 现在我想创建一个新的csv文件修改数据只喜欢 条件是： df1.loc[df1['Code'].astype(str).str.len() >12, 'Code']= '0' 我试过的是 import pandas as pd df1 = pd.read_csv('input.csv') df1.lo...
• # 形状值不匹配

我更改了.mat输入文件，下面出现了一个错误 D:\neuraltalk\imagernn\generic_batch_generator.py:141: FutureWarning: arrays to stack must be passed as a "sequence" type such as list or tuple. Support for non-sequence iterables such as generators is deprecated as of NumPy 1.16 and...
• # 防止Matplotlib将绘图仅拉伸到绘图区域的B框

请看下图： I set the figure size of plt equal to something like (4,6) and set axis to off and margin to zero. Then continue to draw polyline using coordinate array by ax.plot(line[:,1],line[:,0]) after this I don’t use the plt.show() But convert the plot to nu...
• # 用Python编写大型CSV的最快方法

我想写一些随机样本数据在一个csv文件，直到它是1GB大。以下代码正在工作： import numpy as np import uuid import csv import os outfile = 'data.csv' outsize = 1024 # MB with open(outfile, 'ab') as csvfile: wtr = csv.writer(csvfile) while (os.path.getsize(outfile)//1024**2) < outsize: ...
• # What is the difference between PIL.ImageChops.subtract and first converting to numpy arrays and then subtract those?

So I want to subtract Image2 from Image1 using Pillow. I first tried to do this by converting them to numpy arrays, subtract those and then converting the arrays back to Images. But this gave me very strange behavior s.t. large parts of the difference pict...
• # Int object is not subscriptable problem with array?

Still new to this place and python so if I am doing something wrong, please tell. Have looked at previous questions, none seem to fix it as far as I can tell. I have written a piece of code to generate an island, and I have written down here all the code i...
• # Numpy, PIL doesn't invert PNG image

I was doing a course which taught data science; it had a portion on using NumPy arrays for image inversion. It's able to invert jpg, but isn't able to invert PNG, I tried other images with the same extension, it doesn't work on those which have "png" exten...
• # “未知字符串格式：”pandas/pyplot解析器错误

我想画一段数据帧。第一列的格式是使用tou datetime方法： all_data['Date_Time_(GMT)'] = pd.to_datetime(all_data['Date_Time_(GMT)']) ... all_data['Date_Time_(GMT)'].dtype [out] dtype('<M8[ns]') 第二列是一组整数： all_data[new_column].dtype [out] dtype('int64') 当我试图绘制这两列时，我得到了一个解析器错误。以下是绘...

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