Reduce a vector to the size of another vector

Question

Noah Kilps 2020-10-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606081-reduce-a-vector-to-the-size-of-another-vector

评论： Noah Kilps 2020-10-6

matlab_question.xlsx

Hello,

I have two vectors currently. I have nonzeroDecel which is a 1x2168 double and start_1G which is a 1x7 double. I need to reduce nonzeroDecel so that for each number of start_1G, it takes the number that's closest and bigger than the number in start_1G. In the end I want nonzeroDecel to also be a 1x7. Any ideas? I have attached the variables from excel so you do not have to make up your own if you don't want to.

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

KSSV 2020-10-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606081-reduce-a-vector-to-the-size-of-another-vector#answer_506246

编辑：KSSV 2020-10-6

在 MATLAB Online 中打开

Read about ismember, ismembertol, knsnearch.

If v is the vector and val is the value for which you want to get the closest value from v, use:

num = xlsread("matlab_question.xlsx") ; 
vec = num(:,1) ; 
val = num(:,2) ; 
% Remove nans 
val(isnan(val)) = [] ; 
iwant = zeros(size(val)) ; 
for i = 1:length(val) 
  [v,idx] = min(abs(vec-val(i))) ; 
  iwant(i) = vec(idx) ; 
end