extract out values out of loop

Question

Oday Shahadh 2020-12-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/700550-extract-out-values-out-of-loop

编辑： Jan 2020-12-22

采纳的回答： James Tursa

Can any one pls help how to extarct [XYZ,H,D,I,F] out of the below loop

Thanks

for i= 1: length(Hi)

[XYZ,H,D,I,F] = wrldmagm(Hi(i),Lat(i),Long(i),decimalYear(i));

end

Can

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

dpb 2020-12-22

Preallocate and index, maybe?

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

James Tursa 2020-12-22

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/700550-extract-out-values-out-of-loop#answer_582283

在 MATLAB Online 中打开

Make them arrays and assign to the elements. E.g.,

for i= 1: length(Hi)
    [XYZ(:,i),H(i),D(i),I(i),F(i)] = wrldmagm(Hi(i),Lat(i),Long(i),decimalYear(i));
end

Consider pre-allocating XYZ, H, D, I, and F also.

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。

Answer 2

Jan 2020-12-22

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/700550-extract-out-values-out-of-loop#answer_582290

编辑：Jan 2020-12-22

在 MATLAB Online 中打开

% Pre-allocation of the output:
len = length(Hi);
XYZ = zeros(3, len);
H   = zeros(1, len);
D   = zeros(1, len);
I   = zeros(1, len);
F   = zeros(1, len);
for i = 1:length(Hi)
  [XYZ(:, i), H(i), D(i), I(i), F(i)] = wrldmagm(Hi(i), Lat(i), Long(i), decimalYear(i));
end