我们从Python开源项目中，提取了以下3个代码示例，用于说明如何使用scipy.sin()。
def rvs( self ): if self.ss == 0: x = random.random() * self.w y = random.random() * self.h self.set_point( x, y ) while self.qs: x_idx = int( random.random() * self.qs ) s = self.queue[ x_idx ] for y_idx in range( self.n ): a = 2 * scipy.pi * random.random() b = scipy.sqrt( self.A * random.random() + self.r2 ) x = s[0] + b*scipy.cos( a ) y = s[1] + b*scipy.sin( a ) if( x >= 0 )and( x < self.w ): if( y >= 0 )and( y < self.h ): if( self.distance( x, y ) ): self.set_point( x, y ) del self.queue[x_idx] self.qs -= 1 sample = list( filter( None, self.grid ) ) sample = scipy.asfarray( sample ) return sample
def rotate(x, y, U_direction_radians): x_r = x*np.cos(U_direction_radians)-y*np.sin(U_direction_radians) y_r = x*np.sin(U_direction_radians)+y*np.cos(U_direction_radians) return x_r, y_r
def ellipse2bbox(a, b, angle, cx, cy): a, b = max(a, b), min(a, b) ca = sp.cos(angle) sa = sp.sin(angle) if sa == 0.0: cta = 2.0 / sp.pi else: cta = ca / sa if ca == 0.0: ta = sp.pi / 2.0 else: ta = sa / ca x = lambda t: cx + a * sp.cos(t) * ca - b * sp.sin(t) * sa y = lambda t: cy + b * sp.sin(t) * ca + a * sp.cos(t) * sa # x = cx + a * cos(t) * cos(angle) - b * sin(t) * sin(angle) # tan(t) = -b * tan(angle) / a tx1 = sp.arctan(-b * ta / a) tx2 = tx1 - sp.pi x1, y1 = x(tx1), y(tx1) x2, y2 = x(tx2), y(tx2) # y = cy + b * sin(t) * cos(angle) + a * cos(t) * sin(angle) # tan(t) = b * cot(angle) / a ty1 = sp.arctan(b * cta / a) ty2 = ty1 - sp.pi x3, y3 = x(ty1), y(ty1) x4, y4 = x(ty2), y(ty2) minx, maxx = Util.minmax([x1, x2, x3, x4]) miny, maxy = Util.minmax([y1, y2, y3, y4]) return sp.floor(minx), sp.floor(miny), sp.ceil(maxx), sp.ceil(maxy)
