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pandas dataframe columns scaling with sklearn
...]
df_norm = (df - df.min()) / (df.max() - df.min())
print df_norm
print pd.concat((df_norm, dfTest.C),1)
A B
0 0.000000 0.000000
1 0.926219 0.363636
2 0.935335 0.628645
3 1.000000 0.961407
4 0.938495 1.000000
A B C
0 0.000000 0.000000 big
1 0...
node.js execute system command synchronously
...2012: How to get STDOUT]
var lib = ffi.Library(null, {
// FILE* popen(char* cmd, char* mode);
popen: ['pointer', ['string', 'string']],
// void pclose(FILE* fp);
pclose: ['void', [ 'pointer']],
// char* fgets(char* buff, int buff, in)
fgets: ['string', ['string', 'int','po...
Forward an invocation of a variadic function in C
...t. See http://c-faq.com/varargs/handoff.html.
Example:
void myfun(const char *fmt, va_list argp) {
vfprintf(stderr, fmt, argp);
}
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Allowed characters in filename [closed]
Where can I find a list of allowed characters in filenames, depending on the operating system?
(e.g. on Linux, the character : is allowed in filenames, but not on Windows)
...
Why should hash functions use a prime number modulus?
...a simple hash function works by taking the "component parts" of the input (characters in the case of a string), and multiplying them by the powers of some constant, and adding them together in some integer type. So for example a typical (although not especially good) hash of a string might be:
(fir...
JavaScript: clone a function
...m[3] || ''
}
var clone = Function.prototype.constructor.apply(this, [].concat(conf.args, conf.body));
return clone;
}
Enjoy.
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How do I use Django templates without the rest of Django?
... Context, TemplateReference, Macro, Markup, TemplateRuntimeError, missing, concat, escape, markup_join, unicode_join
name = None
def root(context, environment=environment):
l_data = context.resolve('data')
t_1 = environment.filters['upper']
if 0: yield None
for l_row in l_data:
...
Determine path of the executing script
...ll start with a '/'. Otherwise, it must be relative to the cwd and you can concat the two paths to get the full path.
Edit: it sounds like you'd only need the script.name above and to strip off the final component of the path. I've removed the unneeded cwd() sample and cleaned up the main script an...
How to handle Objective-C protocols that contain properties?
...hInteger:(factor*amount)];
}
// <<
@end
int main(int argc, const char * argv[])
{
@autoreleasepool {
Person *duncan=[[Person alloc]initConforming];
duncan.firstname=@"Duncan";
duncan.lastname=@"Smith";
[Viewer printLargeDescription:duncan];
S...
How to generate string of a certain length to insert into a file to meet a file size criteria?
...
You can always use the a constructor for string which takes a char and a number of times you want that character repeated:
string myString = new string('*', 5000);
This gives you a string of 5000 stars - tweak to your needs.
...