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Creating a Pandas DataFrame from a Numpy array: How do I specify the index column and column headers
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You need to specify data, index and columns to DataFrame constructor, as in:
>>> pd.DataFrame(data=data[1:,1:], # values
... index=data[1:,0], # 1st column as index
... columns=data[0,1:]) # 1st row as the column...
Difference between Math.Floor() and Math.Truncate()
... completeness, Math.Round rounds to the nearest integer. If the number is exactly midway between two integers, then it rounds towards the even one. Reference.
See also: Pax Diablo's answer. Highly recommended!
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Empty set literal?
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No, there's no literal syntax for the empty set. You have to write set().
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Can you explain the concept of streams?
...hat you can wrap streams, and your methods will still work perfectly. For example, you could do this:
int ReadInt(StreamReader reader) { return Int32.Parse(reader.ReadLine()); }
// in another method:
Stream fileStream = new FileStream("My Data.dat");
Stream zipStream = new ZipDecompressorStream(fi...
Why use symbols as hash keys in Ruby?
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Fyi, Symbols will be GCd in the next version of Ruby: bugs.ruby-lang.org/issues/9634
– Ajedi32
Sep 30 '14 at 14:46
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Autoreload of modules in IPython [duplicate]
...IPython automatically reload all changed code? Either before each line is executed in the shell or failing that when it is specifically requested to. I'm doing a lot of exploratory programming using IPython and SciPy and it's quite a pain to have to manually reload each module whenever I change it.
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OSX - How to auto Close Terminal window after the “exit” command executed.
When I'm done with Terminal, I want to exit it. Right now, I have three options:
14 Answers
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Why, Fatal error: Class 'PHPUnit_Framework_TestCase' not found in …?
...ndle this for you:
require_once 'PHPUnit/Autoload.php';
Thanks to Phoenix for pointing this out!
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How to display pandas DataFrame of floats using a format string for columns?
...rame with a given format using print() and the IPython display() . For example:
7 Answers
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Contains method for a slice
...onsider using a map instead.
It's trivial to check if a specific map key exists by using the value, ok := yourmap[key] idiom. Since you aren't interested in the value, you might also create a map[string]struct{} for example. Using an empty struct{} here has the advantage that it doesn't require any...