Is displaying an image using matplotlib.pyplot a graph? [closed] - python

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Input:
import scipy.misc
import matplotlib.pyplot
matplotlib.pyplot.imshow(scipy.misc.lena())
The following code displays an image of a woman on a 500 x 500 grid. My questions are as follows:
1.Is this technically considered a graph? (From my knowledge a graph is the relationship between an x coordinate to a y coordinate, this seems to not be the case, but the numbers on the sides makes it confusing)
2.What do the numbers on the x and y axis represent? Is that only the sizing?

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Best way to perform plotting with matplotlib to achieve OHLC like plots? [closed]

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The library mplfinance offers a good possibility to perform OHLC plotting with Python/Matplotlib. Nevertheless I want to / have to build a small application that does a kind of OHLC plotting by itself.
I am wondering how I should perform the (huge) amount of vertical and horizontal bars by myself.
Is it the best to do a plt.plot() for all the data I have or is there a more performant way to do this using matplotlib?
Snippet of mplfinance output

Cluster label plotting [closed]

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I have cluster labels in one columns and one more column to make comparison or analyze the clusters.
import pandas as pd
parties_and_cluesters = pd.DataFrame({'Parties':['A','B','C','C','A','No Party','B','A'],
'Clusters':['Cluster 2','Cluster 1','Cluster 4','Cluster 4','Cluster 3','Cluster 0','Cluster 3','Cluster 2',]
})
What is the best way to see the outcome? I thought plotting bar-plot but didn't sound good to me. I want to see if clusters reasonable.

Question not clear. If wanted to visualize and feel nice try seaborn count plot
import seaborn as sns
ax = sns.countplot(x="Clusters", data=parties_and_cluesters)
Following your comments
parties_and_cluesters.groupby('Clusters')['Parties'].value_counts().unstack().plot.bar()

In addition to above answer, you may want to display it as stacked. And as I saw from the chat, you can use legend as a seperate part of your plot.
plt.figure(figsize=(20,10))
parties_and_cluesters.groupby('Clusters')["Parties"].value_counts().unstack().plot.bar(stacked=True)
plt.legend(bbox_to_anchor=(1.05, 1), loc='upper left')
plt.gcf().set_size_inches(10, 5)

matplotlib interactive plot with slices of image [closed]

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How would I make an interactive plot like the one displayed here? I'd like to show an image with x and y slices of the image taken at a point that can be adjusted by clicking on the image.
I know this one was made in Chaco, but since Chaco isn't compatible with python3, just matplotlib or bokeh would be preferable.

Using tacaswells suggestion, I found that the cross_section_2d in bubblegum was just what I was looking for.
First I installed bubblegum from github https://github.com/Nikea/bubblegum.git
Then the following sets up a cross_section image
import matplotlib.pyplot as plt
import numpy as np
from bubblegum.backend.mpl.cross_section_2d import CrossSection
fig= plt.figure()
cs= CrossSection(fig)
img= np.random.rand(100,100)
cs.update_image(img)
plt.show()
Thanks!

plot Planetary Boundary layer height [closed]

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I would like to know if someone has an easy program to plot Planetary Boundary Layer height on a map (2D in lat/lon) in fortran 90 or python (or NCL).
I am using a program in F.90 but it is not working so I would like to compare with a second program.
Thank you

Here's a Python example with matplotlib and netCDF4 modules:
import matplotlib.pyplot as plt
from netCDF4 import Dataset
nc = Dataset('mydatafile.nc','r')
lon = nc.variables['lon'][:]
lat = nc.variables['lat'][:]
pblh = nc.variables['pblh'][:]
nc.close()
plt.contourf(lon,lat,pblh)
plt.colorbar()
plt.savefig('pblh.png')
ptl.clf()
You may need to edit this example to match your data, e.g. filename, variable names etc.

How to draw a box around a set of nodes in pydot or networkx [closed]

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I have used pydot and networkx to build and show my graph. I have two questions:
How can I differentiate between the nodes with similar names?
For instance, there are two nodes with different values, but I want to show both of them with 'node_x' in my graph.
How can I draw a rectangle around a set of nodes in my graph?

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