How can I put Excel data into the function?

Question

민제 강 2021-7-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/878078-how-can-i-put-excel-data-into-the-function

回答： Walter Roberson 2021-7-14

rosen20.xlsx

function [y] = rosensc(xx)
xx = [x1 x2 x3 x4];
for ii = 1:4
    xxbar(ii) = 15*xx(ii) - 5;
end
sum = 0;
for ii = 1:3
	xibar = xxbar(ii);
	xnextbar = xxbar(ii+1);
	new = 100*(xnextbar-xibar^2)^2 + (1-xibar)^2;
	sum = sum + new;
end
y = (sum - 3.827*10^5) / (3.755*10^5);
end

I have Excel file about x1 x2 x3 and x4 value.

So I want to get 20 Y values about x1 x2 x3 x4.

Please let me know. Thank you!

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

Walter Roberson 2021-7-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/878078-how-can-i-put-excel-data-into-the-function#answer_746393

在 MATLAB Online 中打开

format long g
filename = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/683938/rosen20.xlsx';
data = readmatrix(filename);
h = height(data);
Y = zeros(h,1);
for K = 1 : h
  Y(K) = rosensc(data(K,:));
end
Y
Y = 20×1
          104221.223285056
          18421.5879316538
          12369.3018011083
          14678.1935484914
          6757.98685897914
           770.00639995527
           76930.949171674
          107554.180109397
          160124.763289724
          13632.6698832972
function [y] = rosensc(xx)
for ii = 1:4
    xxbar(ii) = 15*xx(ii) - 5;
end
sum = 0;
for ii = 1:3
	xibar = xxbar(ii);
	xnextbar = xxbar(ii+1);
	new = 100*(xnextbar-xibar^2)^2 + (1-xibar)^2;
	sum = sum + new;
end
y = (sum - 3.827*10^5) / (3.755*10^5);
end