All Questions
Tagged with numpy matplotlib
6,639
questions
1
vote
2
answers
27
views
sharex and imshow do not produce plots of the same width
Context: I have the x,y and x,z projection of an image. I want the two images to be stacked vertically sharing the same width.
My trial: I tried the following:
import numpy as np
import matplotlib....
- 2,318
-1
votes
0
answers
25
views
A problem with Importing Matplotlib (A module that was compiled using NumPy 1.x) [duplicate]
When I'm trying to import matplotlib by the following standard code:
import matplotlib.pyplot as plt
I'm getting the following error massage:
A module that was compiled using NumPy 1.x cannot be run ...
- 19
0
votes
1
answer
33
views
Computing and Visualizing Linear Trends in Ocean Temperature Data
I have a dataset containing ocean temperature values for the time period 1950-2022, covering the entire globe. My goal is to calculate the linear trend for each surface grid box and visualize the ...
- 21
0
votes
1
answer
59
views
Plot a path in a very large 2D matrix using Matplotlib
I want to plot a path in a very large (e.g. 500K x 500K) 2D matrix. My current approach is creating an uint8 np array (for space-saving reasons, as I only have 4 possible values) and plotting it with ...
- 21
0
votes
2
answers
89
views
Plotting a chirp square signal in python
Wikipedia definition: A chirp is a signal in which the frequency increases (up-chirp) or decreases (down-chirp) with time. In some sources, the term chirp is used interchangeably with sweep signal.
I ...
- 39
0
votes
1
answer
50
views
Three array scatter plot using Numpy and Matplotlib
import matplotlib.pyplot as plt
x =[24,73,94,8,26,80,89,23,7,50]
y =[52,98,48,39,50,84,76,96,76,9]
z=[14,56,79,21,42,67,5,55,27,91,10]
plt.scatter(x, y,z)
# To show the plot
plt.show()
I ...
0
votes
1
answer
39
views
Average of Sampled Data at Different Sampling Points
I need to plot the average of different trails of my sampled data y. The difficult part is that the corresponding sample points x do not coincide. However, x can only range from 0 to 1.
The following ...
- 143
0
votes
0
answers
41
views
Does the Intensity of color in OpenCV image matter?
Here is a simple code which puts a text value onto a black frame and displays it:
frame = np.zeros((50,200,3))
org=(0,45)
font=cv2.FONT_HERSHEY_SIMPLEX
fontScale=1
fontColor=(1,0,0) ##rgb
out_img =...
- 1,161
1
vote
0
answers
90
views
Trying to use Matplotlib, but it doesn't work even with downgraded Numpy version
I'm trying to import Matplotlib, but I keep getting import error with the following message:
If you are a user of the module, the easiest solution will be to
downgrade to 'numpy<2' or try to ...
- 11
0
votes
0
answers
54
views
Unexpected horizontal line in discrete inverse Fourier transform of Gaussian function with odd number of samples
I'm implementing a discrete inverse Fourier transform in Python to approximate the inverse Fourier transform of a Gaussian function.
While the output looks promising, I'm encountering an unexpected ...
- 3,919
0
votes
0
answers
62
views
Why does my numpy convolution appear off-centred?
The first part of this post is now not necessary for my question, please see the edit.
I'm trying to convolve two probability maps in Python with numpy.convolve, and decided to use mode='same' so that ...
3
votes
1
answer
106
views
Thread safeness and slow pyplot.hist
The hist function of matplotlib.pyplot runs very slow which seemingly has to do with the structure I have chosen. I built a front panel in Tkinter which starts a control loop for a camera. To keep the ...
- 152
0
votes
1
answer
238
views
ValueError: object __array__ method not producing an array : it occor when I run my code [duplicate]
ValueError: object array method not producing an array and TypeError: Invalid shape (1, 1, 6, 6) for image data
When attempting to run the following code, the following errors occur.
Code
import torch
...
- 9
-1
votes
2
answers
105
views
List of arithmetic sequences and cumulative sums [closed]
I have a list of time (seconds) that looks like that:
l = [2,4,6,8,2,4,6,8,10,30,60,30,60]
2,4,6,8 is the first time interval.
2,4,6,8,10 the second time interval.
30,60 the third time interval.
...
- 47
1
vote
1
answer
38
views
scipy sosfilt array shape
I'm trying to plot a filter response in two ways, plot against time and the second plot against frequency. My aim is to plot cascaded filters, filter1 & filter2 for now.
The plot against frequency ...
- 141