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How do I create test and train samples from one dataframe with pandas?
I have a fairly large dataset in the form of a dataframe and I was wondering how I would be able to split the dataframe into two random samples (80% and 20%) for training and testing.
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How do I get indices of N maximum values in a NumPy array?
NumPy proposes a way to get the index of the maximum value of an array via np.argmax .
16 Answers
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Android TextView with Clickable Links: how to capture clicks?
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Based upon another answer, here's a function setTextViewHTML() which parses the links out of a HTML string and makes them clickable, and then lets you respond to the URL.
protected void makeLinkClickable(SpannableStringBuilder strBuilder, final URLSpan span)
{
int ...
Selecting only first-level elements in jquery
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$("ul > li a")
But you would need to set a class on the root ul if you specifically want to target the outermost ul:
<ul class="rootlist">
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Then it's:
$("ul.rootlist > li a")....
Another way of making sure you only have the root li elements:
$...
How can I start PostgreSQL server on Mac OS X?
I had forgotten to run the initdb command.
33 Answers
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What's the best way to get the last element of an array without deleting it?
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32 Answers
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Elasticsearch query to return all records
...tems. (where BIGNUMBER equals a number you believe is bigger than your dataset)
BUT, elasticsearch documentation suggests for large result sets, using the scan search type.
EG:
curl -XGET 'localhost:9200/foo/_search?search_type=scan&scroll=10m&size=50' -d '
{
"query" : {
"matc...
Java: random long number in 0
Random class has a method to generate random int in a given range. For example:
16 Answers
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How large should my recv buffer be when calling recv in the socket library
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For streaming protocols such as TCP, you can pretty much set your buffer to any size. That said, common values that are powers of 2 such as 4096 or 8192 are recommended.
If there is more data then what your buffer, it will simply be saved in the kernel for your next call to recv....
Is there a way to call a stored procedure with Dapper?
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Sam, does this allow result sets from SPROCs?
– Brad
Jan 16 '15 at 19:43
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