Finding common x values along with the corresponding y values.

Question

Mr. 206 2019-2-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/447065-finding-common-x-values-along-with-the-corresponding-y-values

回答： Jan 2019-2-26

I have to sets of data, First set comprises of x_exp and y_exp. And second set comprises of x_sim and y_sim. They are as follows,

x_exp=[980;1000;1020;1040;1040];
y_exp=[0.003;0.10;0.020;0.008;0.002];
x_sim=[920;940;960;980;1000;1020;1040;1040];
y_sim=[0.005;0.003;0.0010;0.0025;0.0050;0.008;0.010;0.020];

I want to find the common values between x_exp and x_sim along with the corresponding y_sim values.

The result that I expect is

x_sim=[980;1000;1020;1040;1040];
y_sim=[0.0025;0.0050;0.008;0.010;0.020];

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

Yasasvi Harish Kumar 2019-2-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/447065-finding-common-x-values-along-with-the-corresponding-y-values#answer_362787

在 MATLAB Online 中打开

Hi,

Try something like this,

t = 1;
for i =1:length(x_exp)
    for j = 1:length(x_sim)
        if x_exp(i) == x_sim(j)
            x(t) = x_sim(j);
            y(t) = y_sim(j);
            t = t+1;
            break
        end
    end
end

x and y are your results.

Regards

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 2019-2-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/447065-finding-common-x-values-along-with-the-corresponding-y-values#answer_362793

在 MATLAB Online 中打开

[match, index] = ismember(x_exp, x_sim)
result         = y_sim(index(match))

A problem is the repeated value:

x_exp = [1040; 1040]
x_sim = [1040; 1040];
y_sim = [0.010; 0.020];

ismember uses the first occurrence. If you want to use a found value once only, you have to write some special code, which considers this. Then start with Yasasvi Harish Kumar's solution and overwrite a found x_sim value.