Thank you for your contribution @Saunakghosh10!

Please could you revert the changes to setup.py. They seem unrelated to the intent of this PR and I think they are causing all the failures in our automated checks below.

There are also several style issues highlighted by the flake8 checks. If these could be addressed, it will make it easier to review this in more detail. See the second bullet here for how to run flake8 checks locally.

okay thank you

Thanks for making this example! Can you please write it using ax. API to conform to our style guidelines? https://matplotlib.org/devdocs/devel/document.html#write-examples-and-tutorials

If you're not sure how, please ask here or in our chat.

Eta: also please revert the changes to 3D bar since there isn't anything especially related to 3D here.

Thanks for the desire to improve our examples!

Please describe more clearly what the purpose is. As of now, I do not see the benefit of adding this

create bar plots with customizable labels, values, and colours.

is already provided by the builtin bar() function. The only new aspect is the possibility to use colors from a colormap. However,

1. I'm not sure that this warrants a new example. It's basically an orthogonal concept and we generally try to avoid these combinations because they'd result in vast amouts of examples ("bars with colors from a colormap", "line plots with colors from a colormap", "boxplots with colors from a colormap", ...) which makes finding relevant information much more difficult.

2. If there are good reasons to show this combination, I'd like to see a more practical example:
   a) The function essentially boils down to

   colors = plt.cm.viridis(np.linspace(0, 1, len(labels)))
   plt.bar(labels, values, colors=colors)
   

   with additional hard-coded x/ylabels, title etc. This is not a function one could use in a real-world example. The above two lines are enough to demonstrate the concept of getting colors from a colormap.

   b) The reason for individual colors should be to encode additional information. Just encoding the sequence of bars (i.e. effectively overlaying the bar plot with a discretized color gradient) is thus not a good example. If we want to show this, we'd need a more real-world example where the coloring actually conveys additional information.

@timhoffm I haven't looked in detail, but I think this one is in response to @story645's suggestion at #26310.

Thanks for making this example! Can you please write it using ax. API to conform to our style guidelines? https://matplotlib.org/devdocs/devel/document.html#write-examples-and-tutorials

If you're not sure how, please ask here or in our chat.

Eta: also please revert the changes to 3D bar since there isn't anything especially related to 3D here.

import matplotlib.pyplot as plt
import numpy as np

def custom_bar_plot(labels, values, colors=None):
"""
Custom bar plot function that plots bars with optional custom colors.

Parameters:
    labels (array-like): Labels for each bar.
    values (array-like): Values for each bar.
    colors (array-like, optional): Colors for each bar. If not provided, default colors are used.

Returns:
    None
"""
x = np.arange(len(labels))
if colors is None:
    colors = plt.cm.viridis(np.linspace(0, 1, len(labels)))

fig, ax = plt.subplots()
ax.bar(x, values, color=colors)
ax.set_xlabel('Categories')
ax.set_ylabel('Values')
ax.set_title('Custom Bar Plot')
ax.set_xticks(x)
ax.set_xticklabels(labels)
ax.grid(True)
plt.show()

I'm not sure that this warrants a new example.

Agree, that's why I suggested it as a new section in the bar color demo.

@Saunakghosh10 great that it's now in ax style. I agree w/ @timhoffm that there isn't much utility in this being a function since the functionality you need is just what Tim shows. Can you pull this code out of a function and add some simple dummy data?

okay on it

Also, to revert the changes to setup.py and to the plot_gallery example, try https://git-scm.com/docs/git-reset#Documentation/git-reset.txt-Resetasinglefileintheindex

@Saunakghosh10 are you still interested in working on this?

@Saunakghosh10 are you still interested in working on this?

yes I am and I and I am working on that only tbh..

I'm going to mark this as "draft" for now. Please mark it as "ready for review" when you are ready. In the meantime, if you need help, feel free to ask questions here. Or you may prefer to ask them in our incubator gitter room.

Closing because of the need for additional functionality is not clear.