Table's rows pow and the sum

Question

Thanos Lampridis 2016-9-2

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/301734-table-s-rows-pow-and-the-sum

回答： dpb 2016-9-2

I'm building this code I'm building this code

>> A=imread('C:\Users\ADMIN\Desktop\canada.bmp');
>> level=graythresh(A)
level =
    0.6235
>> BW=im2bw(A,level);
>> C=imcontour(BW);
>>array2table(C.', 'VariableNames', {'J', 'K'});

So far i have a table with 9540 rows and 2 colls.I want to MULTIPLY each row's data but first pow them.And then to get the final summary of all rows FOR EXAMPLE :

                        J    K
                        1    1.1
                        2    2.8
                        3    4.3
  TOTAL SUM=(1^2)*(1.1^2)+(2^2)*(2.8^2)+(3^2)*(4.30)^2