sum+=x%2?x:

sum+=x%2?x: matlab小段代码求解释function [R,mx,my,mse]=circle_detect(x,y)N=length(x);a1=2*(sum(x)^2-N*sum(x.*x));a2=2*(sum(x)*sum(y)-N*sum(x.*y));b1=a2;b2=2*(sum(y)^2-N*sum(y.*y));c1=sum(x.*x)*sum(x)-N*sum(x.^3)+sum(x)*sum(y.*y)-N*sum(x.*y.*y);c2=sum(x.*x 求问一个幂级数展开的问题要证Sum((a_n x^n)/(1-x)) = Sum(a_0 + a_1 + ...+ a_n) x^n就下图的题我的证明是：(a_n)/(1-x) = Sum(a_n x^n) 再带进去变成 Sum(Sum(a_n x^n) x^n) => Sum(a_0 + a_1 + ...+ a_n) x^2n结果算出来跟 matlab里边这个sum（X,1）,sum（X,Examples:If X = [0 1 23 4 5]then sum(X,1) is [3 5 7] and sum(X,2) is [ 312];sum(X,1）是不是第一列求和啊?那为什么不是3 而是 [3 5 7] 那sum(X, int sum=0,x=5；do［sum+=x；］while（!--x）最终sum值是多少? MATLAB中sum（x.^2）中的. matlab中的sum(X, sum(x,y, 帮我分析下这个题目#define ADD(x) x+xmain(){int m=1,n=2,k=3;int sum=ADD(m+n)*k;printf(“sum=%d”,sum);}上面程序的运行结果是（ B ）A）sum=9 B) sum=10 C) sum=12 D) sum=18请说明清楚! 求这段matlab代码的输出结果N=1000X=rand(N,1);Xmean=sum(X)/N;Sigma1=sqrt(sum((X-Xmean).^2)/(N+1))Sigma2=sqrt(sum(X.^2-N*Xmean^2)/(N+1)) x=1:2 和y=x.^2 sum(y) 这是什么意思(matlab) VB编程 Dim sum As Double,x As Double sum = 0 x = 0 For i = 1 To 5 x = n / i n=n+1 sum=sum+x nextprint结果为,sum 为什么结果是1/2+2/3+3/4+4/5而不是1+1/2+2/3+3/4+4/5 VB中赋值语句的有效性下列哪些赋值语句是有效的?sum=sum-sumx+2=x+2x+y=sumlast matlab中sum(X(:,i). fun(int x ,int y) {return(x+y);}main() { int a=1,b=2,c=3,sum;sum=fun((a++;b++,a+b),c++);printf（“%d ”,sum）;}输出结果是多少? matlab用break跳出循环% 用while方式输入10个数 当前数x,平方和sum2,和sum,最后求平均数ave和标准差ydisp(['现在开始请输入n个数']);sum2=0 ;sum=0;x=0;n=0;;while x>=0,n=n+1;sum2=sum2+x^2;sum=sum+x;disp(['现在开始请 看看这个lingo程序哪里出错了?model:sets:de/1..8/:x,y;fe/1..5/:f;link(fe,de):W;endsetsdata:x=5 7 5 4 6 5 5 3;y=25 36 32 15 31 28 22 12;L=20;enddatamin=@sum(de:x*w(1,j))+@sum(de:x*w(2,j))+@sum(de:x*w(3,j))+@sum(de:x*w(4,j))+@sum(de:x*w(5,j))+ 函数f(x)=SUM(Sheet4:Sheet1!$A$2)的含义