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How do I restrict a float value to only two places after the decimal point in C?
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@albert This also has the advantage of no loss of float range as val * 100 could overflow.
– chux - Reinstate Monica
Aug 3 '14 at 15:52
add a comment
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Concatenating Files And Insert New Line In Between Files
...ern $ has two meanings, firstly it matches the last line number only (as a range of lines to apply a pattern on) and secondly it matches the end of the line in the substitution pattern.
If your version of sed doesn't have -s (process input files separately) you can do it all as a loop though:
for ...
Numpy array dimensions
...ow 1 and column 0, 0-based index)
shape
describes how many data (or the range) along each available axis.
In [5]: a.shape
Out[5]: (2, 2) # both the first and second axis have 2 (columns/rows/pages/blocks/...) data
shar...
High Quality Image Scaling Library [closed]
...ighest quality</param>
/// <exception cref="ArgumentOutOfRangeException">
/// An invalid value was entered for image quality.
/// </exception>
public static void SaveJpeg(string path, Image image, int quality)
{
//ensure the qual...
How to remove a key from a Python dictionary?
...xists
>>> import timeit
>>> setup = "d = {i: i for i in range(100000)}"
>>> timeit.timeit("del d[3]", setup=setup, number=1)
1.79e-06
>>> timeit.timeit("d.pop(3)", setup=setup, number=1)
2.09e-06
>>> timeit.timeit("d2 = {key: val for key, val in d.items...
如何选择机器学习算法 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...here you have class A at the low end of some feature x, class B in the mid-range of feature x, and A again at the high end). One disadvantage is that they don’t support online learning, so you have to rebuild your tree when new examples come on. Another disadvantage is that they easily overfit...
How to randomize (shuffle) a JavaScript array?
....lengt()`. See Generating random whole numbers in JavaScript in a specific range? for a very comprehensive explanation.
– Marjan Venema
Dec 18 '16 at 20:17
13
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Why is 1/1/1970 the “epoch time”?
...Jan. 1, 1971, measured in sixtieths of a second".
Because of [the] limited range, the epoch was redefined more than once, before the rate was changed to 1 Hz and the epoch was set to its present value.
Several later problems, including the complexity of the present definition, result from Unix time ...
Calculating Pearson correlation and significance in Python
...= average(y)
diffprod = 0
xdiff2 = 0
ydiff2 = 0
for idx in range(n):
xdiff = x[idx] - avg_x
ydiff = y[idx] - avg_y
diffprod += xdiff * ydiff
xdiff2 += xdiff * xdiff
ydiff2 += ydiff * ydiff
return diffprod / math.sqrt(xdiff2 * ydiff2)
Tes...
How do I iterate through each element in an n-dimensional matrix in MATLAB?
... initial value as 1 with an ending value as a floating point number with a range of [0,1) exclusive of 1 in increasing steps of 1. There is no such possible vector, which results in an empty vector. Your for loop doesn't run, and so your claim is false. -1 vote. sorry.
– rayr...