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Can someone give an example of cosine similarity, in a very simple, graphical way?
...erdam, etc. As said, we can try and imagine the this fancy space for 10 or 100 cities. It's hard to draw, but easy to conceptualize.
I'll wrap up just by saying a few words about the formula itself. As I've said, other references provide good information about the calculations.
First in two dimens...
How can I filter lines on load in Pandas read_csv function?
...t pandas as pd
iter_csv = pd.read_csv('file.csv', iterator=True, chunksize=1000)
df = pd.concat([chunk[chunk['field'] > constant] for chunk in iter_csv])
You can vary the chunksize to suit your available memory. See here for more details.
...
Android Camera : data intent returns null
...
Awesome ! Thanks a lot for explanation :) +100
– Muhammad Riyaz
Jun 12 '13 at 12:36
Th...
How to get file creation & modification date/times in Python?
...stat('somefile.txt')
>>> statinfo
(33188, 422511L, 769L, 1, 1032, 100, 926L, 1105022698,1105022732, 1105022732)
>>> statinfo.st_size
926L
>>>
In the above example you would use statinfo.st_mtime or statinfo.st_ctime to get the mtime and ctime, respectively.
...
Adding iOS UITableView HeaderView (not section header)
... UILabel *headerLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 5,100,20)];
headerLabel.textAlignment = NSTextAlignmentRight;
headerLabel.text = @"LeadCode ";
//headerLabel.textColor=[UIColor whiteColor];
headerLabel.backgroundColor = [UIColor clearColor];
[headerView...
Android - how do I investigate an ANR?
...oadFile(urls[i]);
publishProgress((int) ((i / (float) count) * 100));
// Escape early if cancel() is called
if (isCancelled()) break;
}
return totalSize;
}
// This is called each time you call publishProgress()
protected void onProgres...
Add margin above top ListView item (and below last) in Android
...r even better (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());
– Eugen Pechanec
Sep 29 '14 at 13:04
1
...
Django-DB-Migrations: cannot ALTER TABLE because it has pending trigger events
...
Almost same for me. It worked flawlessly for 100+ migrations(including ~20 data migrations) until today, while adding unique together constraint along with data migration removing duplicates before it. PostgreSQL 10.0
– LinPy fan
A...
Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
...ring data. Here's an example,
df2 = df.assign(D=list('aaabbccc')).sample(n=100, replace=True)
with pd.option_context('precision', 2):
display(df2.groupby(['A', 'B'])
.describe(include='all')
.dropna(how='all', axis=1))
C ...
How to organize large R programs?
...the interpreter much more robust than before. There is no doubt that R is 100-300x slower than C, but usually the bottleneck is concentrated around a few lines of code, which can be delegated to C/C++. I think it would be a mistake to delegate the strengths of R in data manipulation and statistical...