[Matplotlib-users] Remove Axes, Rescale Others to Fill Figure

[vincent.adrien at gmail.com]

Hi Chad,

I am no expert on the topic, but I found the `ax.update_geometry` method that may allow to solve your problem. See at the end of the following example adapted from your own code.

```python
import matplotlib.pyplot as plt
from numpy.random import random
plt.ion()

# generate some data (only 2 channels/5 runs in this example)
nc, nr, nd = 2, 5, 12
data = {c: {r: [random() for x in range(nd)] for r in range(nr)} for c in range(nc)}
data[0][3] = [] # whoops, no data here.

# save the handles here
figaxlist = []
# for each channel
for chan in data:
  nplots = len(data[chan].keys())
  # create a figure with many subplots
  fig, axs = plt.subplots(nplots, sharex=True)
  figaxlist.append((fig, axs))
  for run, ax in zip(data[chan].keys(), axs):
    # plot the data
    ax.plot(data[chan][run], color=f"C{run}")

fig, axs = figaxlist[0]

# removes axes, but leaves hole.
fig.delaxes(fig.axes[3])

# update the axes geometry information
n_nonempty = len(fig.axes)  # amount of non empty plots
for idx, ax in enumerate(fig.axes):
    ax.change_geometry(n_nonempty, 1, idx+1)  # assuming single column layout
```

Hopefully this is more or less what you are looking for.

Regards,
Adrien

Le 04/05/2021 à 23:41, Chad Parker a écrit :
> All-
> 
> I frequently find myself in a position where I am programmatically generating figures with many subplots. For example, I might have data from 8 channels for 10 experimental runs and want to compare the different runs for each channel, ending up with 8 different figures (a figure for each channel), each of which has 10 stacked subplots (a subplot for each run).
> 
> I look at the data I've plotted, and discover that, whoops, channel 0 had an error and didn't produce any data during run number 3, and now I have an empty axis in the middle of my figure. I'd like to be able to delete that empty axes and have the other axes grow to fill the now empty space.
> 
> The Figure class provides the delaxes method, which removes the axes from the figure, but doesn't change the size of any of the other axes. So I still end up with a hole in my figure. I was hoping that tight_layout might take care of it, but it assumes the axes are still there.
> 
> Is there an easy way to do this? Failing that, what's the hard way (I assume it exists)?
> 
> Thank you,
> --Chad
> 
> 
> # generate some data (only 2 channels/5 runs in this example)
> nc, nr, nd = 2, 5, 12
> data = {c: {r: [random() for x in range(nd)] for r in range(nr)} for c in range(nc)}
> data[0][3] = [] # whoops, no data here.
> 
> # save the handles here
> figaxlist = []
> # for each channel
> for chan in data:
>   nplots = len(data[chan].keys())
>   # create a figure with many subplots
>   fig, axs = plt.subplots(nplots, sharex=True)
>   figaxlist.append((fig, axs))
>   for run, ax in zip(data[chan].keys(), axs):
>     # plot the data
>     ax.plot(data[chan][run])
> 
> fig, axs = figaxlist[0]
> 
> # removes axes, but leaves hole.
> fig.delaxes(fig.axes[3])
> 
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