Interpolation problem with interp1

Question

Manal NOURI 2021-9-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1448704-interpolation-problem-with-interp1

评论： Manal NOURI 2021-9-8

Hello everyone:)

I have graphic with some missing data, so I interpolated my data vector to fill the gaps but I have this error message " Brace indexing is not supported for variables of this type." and I could not fond the error! So here is the code I used:

for i=1:length(t0)

R{i}=interp1(t{i},R{i},t0,'linear');

end

thanks in advence😊

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

Image Analyst 2021-9-7

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1448704-interpolation-problem-with-interp1#answer_782874

在 MATLAB Online 中打开

Are t and R cell arrays, tables, or just regular double numerical arrays? If they're just regular numerical arrays, use parentheses, not braces. Please read the FAQ to know when you need to use braces, parentheses, or brackets:

https://matlab.fandom.com/wiki/FAQ#What_is_a_cell_array.3F

If they are just regular vectors, you don't need a for loop, you can simply do

% t is x, R is y, and t0 are the new x values that you want y values for.
interpolatedY = interp1(t, R, t0, 'linear'); 
R = interpolatedY; % If you want to replace your existing R, then do this.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Manal NOURI 2021-9-8

yes it works perfectly :), thank you for your answer and for the link it's so interesting

请先登录，再进行评论。

Answer 2

Ravi Narasimhan 2021-9-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1448704-interpolation-problem-with-interp1#answer_782879

编辑：Ravi Narasimhan 2021-9-8

在 MATLAB Online 中打开

Not sure what your R vector represents but it seems like you are trying to use a loop to interpolate within a one-dimensional array. This is something Matlab does at the array level itself without the need for a loop.

If you look up help interp1 , there's an example of this.

X = 0:10;

V = sin(X);

Xq = 0:.25:10;

Vq = interp1(X,V,Xq);

plot(X,V,'o',Xq,Vq,':.')

X and V have 11 elements.

Xq and the interpolated Vq have 41 elements.

No looping required.