Recent questions tagged Numpy

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numpy - Can not execute python script or go to python shell

I can not run my Python script or even run command Python to go to python shell. What's wrong with ... run Python outside my project directory. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numpy - plot 3d in python using three lists

I followed this link to plot the 3D figure. My problem is I have already 3 lists for X, Y, Z X.shape (n,) ... .plot_surface(X, Y, Z) plt.show() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numpy - Matrix power for sparse matrix in python

I am trying to find out a way to do a matrix power for a sparse matrix M: M^k = M*...*M k ... help is much much appreciated. Thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numpy - f2py, Python function that returns an array (vector-valued function)

In the following Python I have five functions contained in the array returned by func which I have to integrate ... -m trapzdv trapzdv.f90 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numpy - Runge Kutta 4 and pendulum simulation in python

I am trying to make a python program which plot pendulum swings using runge kutta 4. The equation I have is ... getting sine way. Thank you.. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numpy & pandas 'ModuleNotFoundError' in Jupyter notebook (Python 3)

When I try import command for pandas or numpy in Jupyter notebook, I get a 'ModuleNotFoundError' (see below). I ... : No module named 'numpy'` See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numpy - TypeError when using Matplotlib's strpdate2num with Python 3.2

In my current project I want to read some experimental data from a text file into Python using the following code: ... cause how to fix that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numpy - Fitting piecewise function in Python

I'm trying to fit a piecewise defined function to a data set in Python. I've searched for quite a while now, ... b-') #fitted version plt.show() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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653 views

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numpy - Round a Python list of numbers and maintain their sum

I have a list or an array of decimal numbers in Python. I need to round them to the nearest 2 ... rounded entries and the original entries. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numpy - Python: Designing a time-series filter after Fourier analysis

I have a time series of 3-hourly temperature data that I have analyzed and found the power spectrum for ... created outside the main packages? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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638 views

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numpy - Audio Frequencies in Python

I'm writing a code to analyse a single audio frequency sung by a voice. I need a way to analyse the frequency ... with shapes (4096,) (2048,) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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numpy - How does tensorflow batch_matmul work?

Tensorflow has a function called batch_matmul which multiplies higher dimensional tensors. But I'm having a hard time ... the way I expected? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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620 views

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numpy - theano - use tensordot compute dot product of two tensor

I want to use tensordot to compute the dot product of a specific dim of two tensors. Like: A is a tensor, whose ... ) How to do it by tensordot? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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717 views

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numpy - Python row major to column major order vector

Having a matrix like ma = [[0.343, 0.351, 0.306], [0.145, 0.368, 0.487]] I want to get a vector like: [0. ... .267, 0.025, 0.230, 0.061, 0.138] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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numpy - Generating 3D Gaussian distribution in Python

I want to generate a Gaussian distribution in Python with the x and y dimensions denoting position and ... by numpy.random.multivariate_normal. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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994 views

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numpy - Using scientific notation in pandas

I found plenty of answers on how to suppress scientific notation in pandas, but how do I enable it? I ... entire column when exporting/printing. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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720 views

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numpy - Weighted random sample without replacement in python

I need to obtain a k-sized sample without replacement from a population, where each member of the population has ... will be shared with others. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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845 views

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numpy - Python apply_along_axis of multiple arrays

If I have a function, f(x) which takes a single 1d-array as argument and produces a 1d-array as output, I can use ... of shape (50, 100, 4, 4) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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715 views

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numpy - Transpose array and actually reorder memory

I have a 3-D NumPy array, e.g. a = np.random.random((2,3,5)) I would like to transpose the last two ... . What is the best way to achieve this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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949 views

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numpy - Python prints "..." in very large output

I am trying to print something big in python and instead of getting the whole result i get parts of it with " ... when i am writing in files See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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755 views

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numpy - Reading *.mhd/*.raw format in python

Can anyone please tell me the way I can read a dataset containing .mhd/.raw files in python? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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numpy - interpolate missing values 2d python

I have a 2d array(or matrix if you prefer) with some missing values represented as NaN. The missing values are ... missing values in a 2d-array? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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603 views

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numpy - python: getting around division by zero

I have a big data set of floating point numbers. I iterate through them and evaluate np.log(x) for each of ... proceed. Thank you for your help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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883 views

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numpy - Python-OpenCV cv2 OpenCV Error: Assertion failed (scn == 3 || scn == 4) in unknown function, file ......modulesimgprocsrccolor.cpp

I am trying to learn contours in python using cv2. I tried the following code given in a tutorial guide: import cv2 import ... == 3 || scn == 4 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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771 views

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numpy - fit multiple gaussians to the data in python

I am just wondering if there is a easy way to implement gaussian/lorentzian fits to 10 peaks and extract fwhm and ... -: 'NoneType' and 'float' See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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814 views

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numpy - Python - TypeError: Object of type 'int64' is not JSON serializable

I have a data frame that stores store name and daily sales count. I am trying to insert this to Salesforce using ... . How do I fix this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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609 views

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numpy - Importing scipy breaks multiprocessing support in Python

I am running into a bizarre problem that I can't explain. I'm hoping someone out there can help please! I'm ... list and will post any answers. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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616 views

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numpy - How do I write/create a GeoTIFF RGB image file in python?

I have 5 numpy arrays of shape nx, ny lons.shape = (nx,ny) lats.shape = (nx,ny) reds.shape = (nx,ny) ... to disk dst_ds = None # save, close See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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