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Linear Regression and group by in R
...nual time series with one field for year (22 years) and another for state (50 states). I want to fit a regression for each state so that at the end I have a vector of lm responses. I can imagine doing for loop for each state then doing the regression inside the loop and adding the results of each re...
How can I implode an array while skipping empty array items?
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edited May 12 '11 at 22:59
answered May 12 '11 at 22:52
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How to change the opacity (alpha, transparency) of an element in a canvas element after it has been
Using the HTML5 <canvas> element, I would like to load an image file (PNG, JPEG, etc.), draw it to the canvas completely transparently, and then fade it in. I have figured out how to load the image and draw it to the canvas, but I don't know how to change its opacity once it as been drawn.
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Modular multiplicative inverse function in Python
...ome point.
– Thomas
Nov 4 '14 at 13:59
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Get PHP class property by string
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edited Jul 17 '12 at 1:57
GSee
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answered...
How to generate all permutations of a list?
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Starting with Python 2.6 (and if you're on Python 3) you have a standard-library tool for this...
How can I convert a string to boolean in JavaScript?
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edited Apr 25 '18 at 17:32
community wiki
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How to allow only numeric (0-9) in HTML inputbox using jQuery?
...ext field in which I want to allow only numeric characters like (0,1,2,3,4,5...9) 0-9.
68 Answers
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With MySQL, how can I generate a column containing the record index in a table?
... league_girl VALUES (1, 'a', 10);
INSERT INTO league_girl VALUES (2, 'b', 25);
INSERT INTO league_girl VALUES (3, 'c', 75);
INSERT INTO league_girl VALUES (4, 'd', 25);
INSERT INTO league_girl VALUES (5, 'e', 55);
INSERT INTO league_girl VALUES (6, 'f', 80);
INSERT INTO league_girl VALUES (7, 'g', 1...
Stretch background image css?
...er;
}
Works in:
Safari 3+
Chrome Whatever+
IE 9+
Opera 10+ (Opera 9.5 supported background-size but not the keywords)
Firefox 3.6+ (Firefox 4 supports non-vendor prefixed version)
In addition you can try this for an IE solution
filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src...