how to select two arrays from a group of four

Question

Lachlan Pemberton-Pigott 2019-11-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/490963-how-to-select-two-arrays-from-a-group-of-four

评论： Lachlan Pemberton-Pigott 2019-11-14

i have 4 arrays and i need to square each element then find the total. then the 2 arrays that have to lowest total get selected and assigned a value eg, u3

would love some help from a true matlab master

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Thomas Satterly 2019-11-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/490963-how-to-select-two-arrays-from-a-group-of-four#answer_401410

在 MATLAB Online 中打开

To find the sum square of an array:

sumSquared = sum(array.^2);

If you have your arrays all together in a matrix:

% If each array is a colum of the matrix
sumSquaredEachArray = sum(matrix.^2, 1);
% If each array is a row of the matrix
sumSquaredEachArray = sum(matrix.^2, 2);

For finding the two lowest scores, let's assume that you have the scores in an array called "sumSquaredEachArray" (which would happen automatically if you have your arrays organized in a matrix)

% Get the order of lower to highest scores
[~, order] = sort(sumSquaredEachArray);
% Select the first two scores from the sorted order, which would be the lowest two
lowestTwoScores = order(1:2);
% Set those scores to "u3"
sumSquaredEachArrau(lowestScores) = u3;