Plot two sets of unequal data

Question

ayat 2017-4-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/333514-plot-two-sets-of-unequal-data

评论： KSSV 2017-4-5

values.xls

I have the data sets in the attached. I need to plot them all in the same figure, with the first one being x. As you can see, the third column has much lower number of values. I guess I need to somehow have them all interpolated to the empty space between each two values is filled up? Or is there anyway Matlab can do it by some sort of function?

2 个评论
显示无隐藏无

John D'Errico 2017-4-4

How can we "see"? Have you forgotten to attach something? There are no attachments that you have provided.

ayat 2017-4-4

编辑：ayat 2017-4-4

Sorry, I saw the file successfully attached message and thought it was uploaded :D. I added the file.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

KSSV 2017-4-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/333514-plot-two-sets-of-unequal-data#answer_261664

编辑：KSSV 2017-4-4

在 MATLAB Online 中打开

You can interpolate your data using interp1.

Read about interp1

[num,txt,raw] = xlsread('values.xls') ;
x = num(:,1) ;
y = num(:,2) ;
xi = num(:,3) ;
xi = sort(xi(~isnan(xi))) ;
yi = interp1(x,y,xi) ;
plot(x,y,'r')
hold on
plot(xi,yi,'k')

2 个评论
显示无隐藏无

ayat 2017-4-5

But this does not plot the third column though. I want the empty spaces between the values in the third columns to be filled up so they are the same number as the other two (2560).