Skip to main content
Share Your Experience: Take the 2024 Developer Survey

Questions tagged [matplotlib]

Matplotlib is a plotting library for Python which may be used interactively or embedded in stand-alone GUIs. Its compact "pyplot" interface is similar to the plotting functions of MATLAB®.

54 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
3 votes
0 answers
534 views

how can i plot probability distribution of my classes in the way below?

All, I would like to plot the following: I have a binary classification problem where I am using xgboost as my 'model' below: ...
Maths12's user avatar
  • 526
3 votes
1 answer
741 views

Plotting Gradient Descent in 3d - Contour Plots

I have generated 3 parameters along with the cost function. I have the $\theta$ lists and the cost list of 100 values from the 100 iterations. I would like to plot the last 2 parameters against cost ...
m2rik's user avatar
  • 321
3 votes
0 answers
455 views

Plotting facetgrid in subplot for IRIS dataset

I'm trying to plot 6 selected pair subplots with the combination of facetgrid of seaborn and scatter plot from matplotlib. I'm getting plot, but subplots remains empty whereas facetgrid gets plotted ...
Shadab Hussain's user avatar
2 votes
1 answer
3k views

Plotting the confidence interval for a plot in python

I have a curve and I want to create the confidence interval for the curve. Here, I provide a simple example: ...
Sadcow's user avatar
  • 146
2 votes
1 answer
3k views

Plotting confusion matrix for multi classification problem

I am using google colab to solve a multi-classification problem. I am trying to plot the confusion matrix for this problem, I have tried doing so using : ...
AAA's user avatar
  • 145
2 votes
0 answers
3k views

Different scales for 2D plots grouped in 3D perspective in python

I'm trying to realize a plot similar to the one in the following figure: I started from the code contained in the answer here: https://stackoverflow.com/questions/34099518/plotting-a-series-of-2d-...
254's user avatar
  • 21
2 votes
0 answers
32 views

How do I plot between 2 variables in a summation equation?

I am new to Python and using Jupyter notebook. Following is the summation equation that I have: $$y(t) = \sum_{i=1}^{t-1} a_{i}y(t-i)$$ How can I plot between variables y and t by formulating this ...
Ak001's user avatar
  • 21
2 votes
0 answers
359 views

Why are the regions/decision boundaries overlapping with multi-class classification using SVM in sci-kit?

I am using the SVM in scikit-learn library for doing multiclass classification. I am wondering why these regions (decision boundaries) are overlapping (as seen in the picture below)? Could someone ...
Prospero's user avatar
2 votes
0 answers
25 views

Z values get rescaled while plotting in 3d

x_3d = 5.171875 , 5.3125 , 5.171875 ... 6 y_3d = 0, 1, 2, 3, 4, 5, .... 1500 (1500 points) z_3d = -10.493983 , 22.128998 , -14.582531 , 34.687847 , 11....
Kumar Shivendu's user avatar
2 votes
0 answers
176 views

Python equivalent of Wolfram Language ParametricPlot3D?

The Wolfram Language as a ParametricPlot3D that can be used to interactively examine parametric functions in 3D. Which Python package and function(s) best ...
Edmund's user avatar
  • 705
2 votes
0 answers
120 views

How to force histogram plots to have same axes?

I am comparing my trained model with other benchmark models with the error histogram but the axis of histogram is different for each method as shown in figure.For instance to plot the error histogram ...
Muhammad Ali's user avatar
  • 2,487
1 vote
1 answer
38 views

How can I improve this chart?

I have a chart like this: There are some problems that I am stuck: Some columns value are very small compared to others, so I cannot identify whether they are zeros or not (I used logarithm scale, ...
Will's user avatar
  • 11
1 vote
0 answers
32 views

Distplot 'a' parameter, does not make logical sense to me, can anyone explain?

Most sns plot parameters have names that make somewhat logical sense, For example scatterplot has the x attribute to choose what to plot on the x-axis, and y for y-axis. Similarly kdeplot uses the ...
ashtavakra's user avatar
1 vote
0 answers
26 views

Multiclass Classifier comparison decision regions

How can I get the very same effect of this tutorial in Scikit Documentation with more than 2 classes? Let's say we'll keep only the first dataset (the linear separable one) and substitute it with <...
Riccardo D's user avatar
1 vote
1 answer
601 views

Distribution of Regression Residuals: Is this a normal distribution?

I've created a histogram as well as a QQPlot from the residuals of my Regression Model: Mean: 0.35 Standard Deviation: 18.14 Judging from these plots, is it okay to say that my residuals are normally ...
0009's user avatar
  • 31
1 vote
1 answer
60 views

Plot three series on the same plot grouping data by day and month

I have a dataset containing three years of data which I would like to plot and compare by date and month; but, I am having a hard time with the final result. I am nearly there, but for some strange ...
Andrea Moro's user avatar
1 vote
0 answers
1k views

Finding multiple histogram graphs with Seaborn

When graphing with matplotlib I get this 4 histograms model: 4 Histograms Using Seaborn I am getting the exact graph I need but I cannot replicate it to get 4 at a time: I want to get 4 of the ...
The Dan's user avatar
  • 193
1 vote
0 answers
357 views

Images matching using bf.match and drawing using cv2.drawMatches Python

I have successfully matched 2 images using bf.Match and drawn matches as well. Now, I am trying to match multiple images from 2 different directories. For this, I am using 2 different array to store ...
saurav.rox's user avatar
1 vote
0 answers
320 views

logarithmic exponential function python

The code below (I found from googling) does the trick in terms of outcome. What I need to work out is the formula for this, so for any Y point we can get corresponding X. This is part of a larger ...
Peter Verster's user avatar
1 vote
0 answers
197 views

Data Visualization of Feature Distribution Plot

I have been trying my best to plot this type of feature distribution plot using Python. I looked for what they are called to replicate the plot, but couldn't find the name of it? The Reference of ...
Pujan Paudel's user avatar
1 vote
1 answer
2k views

How can I adjust the legend when visualizing clusters in two dimensions?

How can I change the legend as we can see now the legend has some cluster numbers missing. How can I adjust the legend so that it can show all the cluster numbers (such as Cluster 1, Cluster 2 etc, no ...
Cecilia's user avatar
  • 183
1 vote
0 answers
411 views

Matplotlib pyplot: How to plot multiple trends in different areas of the plot?

I am trying plot some trends using matplotlib.pyplot. The task is straightforward, but there is one detail I can't get right. I wish to plot a numpy.array called ...
Leevo's user avatar
  • 6,255
1 vote
0 answers
56 views

same color scheme for 2 pie charts

I want to visualize statistics from two large dataframes with similar data in two pie charts. I would like for these two charts to use the same color when the same category appears in the chart. I ...
krenkz's user avatar
  • 111
1 vote
0 answers
71 views

How to draw diagram like this one (errorsbar)

I would like to draw a graph that looks like this one from: The closest I have come is this graph: by this code: ...
user3225309's user avatar
0 votes
0 answers
8 views

Plotting related multiple plots sharing an axis but each disjoint from each other

I want to plot related multiple plots sharing an axis but each disjoint from each other, i.e., same x-axis feature and scale but each of the other features has their own separate y-axis region with it'...
Snape's user avatar
  • 1
0 votes
0 answers
32 views

Why do seaborn.histplot and pyplot.hist generate two different histograms on the same data?

I'm trying to visualize a customer data, two of the variables I'm looking at are verified_status and video_transcription_length. ...
user161913's user avatar
0 votes
0 answers
26 views

Extracting the lines and arrows from matplotlib streamplot() (issues with scaling)

My goal is to extract the coordinates of lines and arrows produced by plt.streamplot(), since I want to reuse them elsewhere. plt.streamplot() generates lines and arrows as objects of type ...
James's user avatar
  • 133
0 votes
0 answers
12 views

Need to print kNN K's together with NNF / STFT covariance matrix

Challenge on printing print kNN K's together with NNF / STFT covariance matrix Effort works for summary covariance but need solution to print print kNN K's together with NNF / STFT covariance matrix ...
Data Science Analytics Manager's user avatar
0 votes
0 answers
39 views

Quantifying heat map data

I have heatmap data (the x and y axis take in angles as inputs, and the color of that particular spot on the grid represents the "divergence.") I am unsure on how to numerically describe my ...
MaximeJaccon's user avatar
0 votes
0 answers
25 views

Can't show images outputted by a VAE with pyplot.imshow - wrong dimensions

I'm trying to show images generated by a variational autoencoder using pyplot.imshow and make_grid. I can't show them, though, with the following error: "TypeError: Invalid shape (64, 530, 42) ...
avpol's user avatar
  • 21
0 votes
1 answer
62 views

Better understand the scatter plots

I'm trying to understand how to read a scatter plot based on the results of my confusion matrix. This is the CM: I saw an high correlation between column 5 and column 6, a low correlation with column ...
JimBelushi2's user avatar
0 votes
2 answers
46 views

What ML Algo should I use to plot & predict customer location vs. amount spent?

Im using real customer csv files from my ecommerce store. I was initially going to use k cluster with 2 values. I want the two values to be Province Code, and amount spend on my store. This will ...
ChickenJoe's user avatar
0 votes
1 answer
336 views

AttributeError: module 'graphing' has no attribute 'histogram'

I want to make a histogram plot, after importing the library called graphing it gives me an error even when it has been installed. ...
Lisa Chukwu's user avatar
0 votes
0 answers
545 views

Creating a scatter plot with matplotlib with large dataset

I am trying to create a scatter plot from instrument peak area data recorded every tenth of a second or so. For some reason, when I try to plot it with Matplotlib, I get a straight line, which is not ...
Peter Bright's user avatar
0 votes
0 answers
59 views

Can python's matplotlib render images as quickly as R's Cairo device?

I need to render 100k of plots. I already am doing this quickly enough with R's Cairo device. But I am also considering using python. But, I also already know python's rendering of plots is several ...
ivan866's user avatar
  • 210
0 votes
1 answer
240 views

Converting RGB values to contour values

I am using matplotlib to generate a filled contour plot, please consider the below example as a sample contour plot. I want to read off the contour values from such a filled contour plot using opencv'...
Digvijay Rawat's user avatar
0 votes
1 answer
148 views

How to resolve this error while making bar graph?

...
nithin krishna's user avatar
0 votes
1 answer
430 views

Plotting two pd dataframes with n columns, each df representing an axis coordinate?

I have two dataframes which each have n columns (changes depending input), where each dataframe represents an axis coordinate. Each column represents separate lines I want to plot. Example dfs (1st ...
HK44's user avatar
  • 1
0 votes
0 answers
50 views

Trying to understand a PCA output

I recently ran a code to generate PCA for a movie ratings dataset. Actually there were two different datasets, a 'movies' and a 'ratings' one. The movie had about 9700 rows of different movie titles ...
ShridharK's user avatar
  • 101
0 votes
1 answer
407 views

need an explanation of the For Loop in the DBSCAN algorithm Demo

In the following code of the DBSCAN algorithm, as a beginner I need an explanation for what happens to the data in the bottom for loop and why ? Generate sample data ...
soufi-43's user avatar
0 votes
1 answer
8k views

How to plot the bar charts of precision, recall, and f-measure?

I have used 4 machine learning models on a task and now I am struggling to plot their bar charts just like shown below in the image. I am printing classification report to get precision, recall etc. ...
Hamza's user avatar
  • 240
0 votes
1 answer
277 views

Visualization with many lines, colors, and markers

I have a bunch of plots as the one reported below. The data is from measurements performed on different times and different days. In the plot (which is a cumulative distribution function, if that ...
Robyc's user avatar
  • 101
0 votes
1 answer
169 views

Unsynchronized time series visualization

I would like to visualize a large amount of events composed of time serie windows. A typical event would be: Problem is, my events are not synchronized, and so if I plot them all, it would look like: ...
etiennedm's user avatar
  • 1,405
0 votes
1 answer
4k views

Python: How to plot time interval from a Dataframe in Pandas

I have the a dataframe(df) which has the data of a Job being executed at different time intervals. It includes the following details about the execution of a job: ...
Subhawna's user avatar
0 votes
2 answers
122 views

Time Series data visualization

When I visualize data using matplotlib it displays very well, but when using Plotly, the data display very bad.
andow's user avatar
  • 1
0 votes
1 answer
567 views

How to plot segmented bar chart (stacked bar graph) with Python?

cat = {'A':1, 'B':2, 'C':3} dog = {'A':2, 'B':2, 'C':4} owl = {'A':3, 'B':3, 'C':3} Suppose I have 3 dictionary, each containing pairs of (subcategory, count). How ...
Paw in Data's user avatar
0 votes
2 answers
74 views

Information Visualization: which parameters should a data scientist plot to best explain the work behind a Neural Network?

I'm a beginner in the field and I wrote and trained my first Convolutional Neural Network from scratch. I would like to know what types of graphics and parameters a data scientist uses to plot to ...
karalis1's user avatar
  • 461
0 votes
1 answer
443 views

How to add Error Bar to Matplotlib line plot?

I have the following dataset which I use to plot a line plot. The plot is obtained as the mean of values obtained from the data. I want to add error bars to this ...
Ishan Dutta's user avatar
0 votes
1 answer
1k views

Time series plot using netcdf data in python

I am trying to plot a time series for a 3d plot. I know that the variable must be made 1d inorder to make it viable for the time series plot. Actually I want the data within a box of latitude and ...
Debashis Paul's user avatar
0 votes
0 answers
65 views

How may I may fit the cluster number while it is going to the outside of the X-axis and when visualizing clusters in two dimensions?

I am writing code for DBSCAN clustering. I find the eps value which is 0.12 with the help of ...
As if's user avatar
  • 1