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How can I convert an RGB image into grayscale in Python?
I'm trying to use matplotlib to read in an RGB image and convert it to grayscale.
12 Answers
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Accessing the web page's HTTP Headers in JavaScript
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It's not possible to read the current headers. You could make another request to the same URL and read its headers, but there is no guarantee that the headers are exactly equal to the current.
Use the following JavaScript code to get all the H...
How dangerous is it to compare floating point values?
...ses.
First of all, if you want to program with floating point, you should read this:
What Every Computer Scientist Should Know About Floating-Point Arithmetic
Yes, read all of it. If that's too much of a burden, you should use integers/fixed point for your calculations until you have time to read...
Join vs. sub-query
...han LEFT [OUTER] JOIN, but in my opinion their strength is slightly higher readability.
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eval command in Bash and its typical uses
After reading the bash man pages and with respect to this post .
10 Answers
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best way to preserve numpy arrays on disk
...rge numpy arrays. I want to save them to the disk in a binary format, then read them back into memory relatively fastly. cPickle is not fast enough, unfortunately.
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How to format a string as a telephone number in C#
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@Paul Please read the problem definition: "I have a string "1112224444' it is a telephone number. I want to format as 111-222-4444 before I store it in a file".
– Sean
Mar 29 '11 at 16:45
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C pointer to array/array of pointers disambiguation
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I should have re-read what I wrote. I meant 4 for each pointer. Thanks for the help!
– George
May 13 '09 at 18:59
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How to get the nth element of a python list or a default if not available
...unction so that you can call it with an iterable as an argument. Easier to read.
– Noufal Ibrahim
Mar 22 '10 at 12:27
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LINQ .Any VS .Exists - What's the difference?
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I later made a post in another thread where I listed all the Linq "equivalents" of the .NET 2 List<> instance methods.
– Jeppe Stig Nielsen
Dec 1 '15 at 8:44
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