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Installing SciPy and NumPy using pip
... on Ubuntu 14.04:
sudo apt-get install libblas-dev liblapack-dev libatlas-base-dev gfortran
pip install scipy
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get list of pandas dataframe columns based on data type
If I have a dataframe with the following columns:
12 Answers
12
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What are good examples of genetic algorithms/genetic programming solutions? [closed]
...st job as a professional programmer (1995) was writing a genetic-algorithm based automated trading system for S&P500 futures. The application was written in Visual Basic 3 [!] and I have no idea how I did anything back then, since VB3 didn't even have classes.
The application started with a po...
Unable to load config info from /usr/local/ssl/openssl.cnf on Windows
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Or C:\OpenSSL-Win64\bin\openssl.cfg in 64bits systems
– borjab
Nov 13 '14 at 9:59
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What do 'real', 'user' and 'sys' mean in the output of time(1)?
...e <stdio.h>
#include <stdlib.h>
#include <unistd.h>
uint64_t niters;
void* my_thread(void *arg) {
uint64_t *argument, i, result;
argument = (uint64_t *)arg;
result = *argument;
for (i = 0; i < niters; ++i) {
result = (result * result) - (3 * result) + 1...
How to read and write excel file
...eSheet("new sheet");
// Create a row and put some cells in it. Rows are 0 based.
Row row = sheet.createRow((short)0);
// Create a cell and put a value in it.
Cell cell = row.createCell(0);
cell.setCellValue(1);
// Or do it on one line.
row.createCell(1).setCellValue(1.2);
row.createCell(2).setCell...
minimum double value in C/C++
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Meaningful for all specializations in which is_bounded != false.
Online demo
Lots of non portable C++ answers here !
There are many answers going for -std::numeric_limits<double>::max().
Fortunately, they will work well in most of the cases. Floating point encoding schemes decompose a num...
What is the difference between screenX/Y, clientX/Y and pageX/Y?
...orner of the visible part of the page, "seen" through browser window.
See Demo
You'll probably never need screenX/Y
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How to set the prototype of a JavaScript object that has already been instantiated?
...sire.
Basically prototype/methods just allow for a way to group functions based on an object.
Instead of writing
function trim(x){ /* implementation */ }
trim(' test ');
you write
' test '.trim();
The above syntax has been coined the term OOP because of the object.method() syntax.
Som...
Why does struct alignment depend on whether a field type is primitive or user-defined?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.