有没有可能以不同的精度表示相同的变量?
例如,如果我要表示两个整数的加法,它将如下所示:
result = 2+3;
NSLog(@"%.0f", result);
但如果有除法,结果会是这样的:
result = 2/3;
NSLog(@"%.1f", result);
尽管呈现的是π(pi),但它将如下所示:
result = M_PI;
NSLog(@"%.19f", result); //And it would be 3.141592653589793238
我正在尝试写一个计算协方差矩阵的函数。我得到的答案与内置的np.cov()非常相似,但并不完全一样。似乎失去了精确度和精确度。有人知道为什么我的协方差矩阵不那么精确和准确吗?
def cov_matrix(X):
# initialize covariance matrix
mat = np.zeros((X[0].size, X[0].size))
# calculate mean of each column (this is a array)
mu = np.mean(X, axis=0)
# normalized data
norm_X = X
当我运行我的模拟时,我得到了以下错误
terminate called after throwing an instance of 'std::runtime_error'
what(): Error control wants to select step smaller than minimum allowed (1e-14)
我发送了一个购买binance的订单,响应中出现了一个错误: {"code":-1111,"msg":"Precision is over the maximum defined for this asset."} 下面是计算数量的方法: string quanyty = Convert.ToString(Math.Round(Balance()/PriceCTSIBTC(),8));//balance/Price = 10.5673824567 该请求如下所示: var request = new RestRequest("/api
int main(){
long double fraDecimal,fraBinary,bFractional = 0.0,dFractional,fraFactor=0.1;
long int dIntegral,bIntegral=0;
long int intFactor=1,remainder,temp,i;
printf("Enter any fractional decimal number: ");
scanf("%Lf",&fraDecimal);
dIntegral = fraDe