if (point.X.equals(this.POINTA.X)) { k1 = Double.NEGATIVE_INFINITY; } else { k1 = div(sub(point.Y, this.POINTA.Y), sub(point.X, this.POINTA.X)); } //当前线段的斜率k2 Double k2 = null; if (this.POINTB.X.equals(this.
a boot symbol must be added. 0b for binary, 0o for octal, 0x for hexadecimal, and either case. The theoretical range of integer types is from negative infinity to positive infinity. The actual value is limited by the amount of computer memory...
If ``indent`` is a non-negative integer, then JSON array elements and object members will be pretty-printed with that indent level. An indent level of 0 will only insert newlines. ``None`` is the most compact representation. If specified, ``separators`` should be an ``(item_separator,...
strict compliance of the JSON specification, instead of using the JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``). If ``indent`` is a non-negative integer, then JSON array elements and object members will be pretty-printed with that indent level. An indent level of 0 will...
Decimal numbers include special values such as NaN which stands for “Not a number”, positive and negative Infinity, and -0 取余运算、指数幂运算、取绝对值、四舍五入 print(3%2) # 通常就做整数间的取余运算 print(type(3%2)) print(type(3.0%2)) # 不建议浮点型取余 ...
INF:Infinity,代表的是无穷大的意思,也是属于浮点类型。np.inf表示正无穷大,-np.inf表示负无穷大,一般在出现除数为0的时候为无穷大。比如2/0 11.2 NAN特点 NAN和NAN不相等。比如 np.NAN != np.NAN 这个条件是成立的 NAN和任何值做运算,结果都是NAN 11.3 处理缺失值的方式 11.3.1 删除缺失值 有时候,我们想...
copysign:把y的正负号加到x前面,可以使用0 cos:求x的余弦,x必须是弧度 degrees:把x从弧度转换成角度 e:表示一个常量 exp:返回math.e,也就是2.71828的x次方 expm1:返回math.e的x(其值为2.71828)次方的值减1 fabs:返回x的绝对值 factorial:取x的阶乘的值 ...
1d', 'seterr', 'seterrcall', 'seterrobj', 'setxor1d', 'shape', 'shares_memory', 'short', 'show_config', 'sign', 'signbit', 'signedinteger', 'sin', 'sinc', 'single', 'singlecomplex', 'sinh', 'size', 'sometrue', 'sort', 'sort_complex', 'source', 'spacing', 'split...
JavaScript equivalents (``NaN``, ``Infinity``, ``-Infinity``). If ``indent`` is a non-negative integer, then JSON array elements and object members will be pretty-printed with that indent level. An indent level of 0 will only insert newlines. ``None`` is the most compact ...
The // operator first divides the number on the left by the number on the right and then rounds down to an integer. This might not give the value you expect when one of the numbers is negative.For example, -3 // 2 returns -2. First, -3 is divided by 2 to get -1.5. Then -...