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How do I compute derivative using Numpy?
... empty, data isn't sorted against x or when sorted isn't a valid function, etc. It's possible scipy is calling numpy incorrectly, but very unlikely. Check x.shape and y.shape. See if np.interp() works - it may provide a more helpful error if not.
– flutefreak7
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Vim: faster way to select blocks of text in visual mode
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v%
will select the whole block.
Play with also:
v}, vp, vs, etc.
See help:
:help text-objects
which lists the different ways to select letters, words, sentences, paragraphs, blocks, and so on.
“Could not find any information for class named ViewController”
...o make connections, assistant editors recognizes the class in "Automatic", etc...
Works every time.
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How can I measure the similarity between two images? [closed]
...scaling (once the histogram is normalised), and rotation/shifting/movement etc.
Avoid pixel-by-pixel comparisons as if the image is rotated/shifted slightly it may lead to a large difference being reported.
Histograms would be straightforward to generate yourself (assuming you can get access to pi...
Run command on the Ansible host
...at it does not make sense to delegate all tasks, debug, add_host, include, etc always get executed on the controller. Using this with the ‘serial’ keyword to control the number of hosts executing at one time is also a good idea:
---
- hosts: webservers
serial: 5
tasks:
- name: take out...
What is the difference between Normalize.css and Reset CSS?
... @ricmetalster, so did you have to re-write your own css in order to combine functionalities from reset.css and normalize.css?
– ayjay
Jan 23 '14 at 17:48
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What is the javascript filename naming convention? [closed]
...ipts, I've taken to defining instantiable functions (templated view models etc) each in their own file, C# style, for maintainability. For example, ProductDescriptorViewModel lives on its own inside ProductDescriptorViewModel.js (I use upper case for instantiable functions).
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How does Haskell printf work?
...(). For this, we have the instance
instance PrintfType (IO ())
Next, in order to support a variable number of arguments, we need to use recursion at the instance level. In particular we need an instance so that if r is a PrintfType, a function type x -> r is also a PrintfType.
-- instance Pri...
Javascript seconds to minutes and seconds
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... work (like NaN, +/-Infinity etc.) and rounding-options which should be done by the programmer, prior to calling the function, based on the specific needs and possible input-values that the application can encounter! Naturally you are free to patch it i...
How to execute XPath one-liners from shell?
...ght between matching, value, root to just view the document structure, and etc.. Even with the first sel -t -m ... -v ... example from this page: arstechnica.com/information-technology/2005/11/linux-20051115/2, matching all but the last node and saving that one for the value expression like my use ...