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Display image as grayscale using matplotlib
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The following code will load an image from a file image.png and will display it as grayscale.
import numpy as np
import matplotlib.pyplot as plt
from PIL import Image
fname = 'image.png'
image = Image.open(fname).convert("L")
arr = np.asarray(image)
plt.imshow(arr, cmap='gray', vmin...
How to convert R Markdown to PDF?
I've previously asked about the commands for converting R Markdown to HTML .
8 Answers
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Find element's index in pandas Series
... answer. How can I get the index of certain element of a Series in python pandas? (first occurrence would suffice)
10 Answe...
How do I escape a percentage sign in T-SQL?
... to look for 75%
WHERE MyCol LIKE '%75[%]%'
This is simpler than ESCAPE and common to most RDBMSes.
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Indenting #defines
...re-ANSI C preprocessor did not allow for space between the start of a line and the "#" character; the leading "#" had to always be placed in the first column.
Pre-ANSI C compilers are non-existent these days. Use which ever style (space before "#" or space between "#" and the identifier) you prefer...
Change the URL in the browser without loading the new page using JavaScript
...);
link.addEventListener('click', change_my_url, false);
</script>
and a href:
<a href="#" id='click'>Click to change url to bar.html</a>
If you want to change the URL without adding an entry to the back button list, use history.replaceState instead.
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windbg 备忘 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...| 1 s
sx, sxd, sxe, sxi, sxn, sxr, sx- (Set Exceptions)
The sx* commands control the action that the debugger takes when an exception occurs in the application that is being debugged, or when certain events occur.
--引http://www.vcfans.com/2010/04/windbg-study-notes-order.html
Win...
How can I drop all the tables in a PostgreSQL database?
How can I drop all tables in PostgreSQL, working from the command line?
24 Answers
24
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How do I force git to use LF instead of CR+LF under windows?
...d in his question:
the files checked out using msysgit are using CR+LF and I want to force msysgit to get them with LF
A first simple step would still be in a .gitattributes file:
# 2010
*.txt -crlf
# 2020
*.txt text eol=lf
(as noted in the comments by grandchild, referring to .gitattribu...
Django: Display Choice Value
...rio)? Ideally without the overhead of instantiating the Models one by one and calling get_field_display().
– DylanYoung
Mar 23 '17 at 17:34
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