how can i write function with the picture which i attached to the question?

Question

hadi me 2021-6-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/863295-how-can-i-write-function-with-the-picture-which-i-attached-to-the-question

评论： Image Analyst 2021-6-23

hey people

have a good time

i have a problem over the function which i attached to this Question.

i would like to write the function which take 2 variables (e.g. t and o)

and compute rmse and r^2 coefficient

can you help me out over this problem?

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Geoff Hayes 2021-6-23

hadi - what have you tried so far? Please describe what you have attempted and discuss what problem or errors you are experiencing with your code.

hadi me 2021-6-23

I've tried 2 version of this problem

one of that, is:

function [term1 , term2] = stat(o , t)

term1=...

term2=...

end

but it didn't work

I would like to compute the error from 2 rows of input data

I have problem with matlab code.

can you help me?

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Answer 1

Image Analyst 2021-6-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/863295-how-can-i-write-function-with-the-picture-which-i-attached-to-the-question#answer_731595

在 MATLAB Online 中打开

Here's some help:

MATLAB Academy - Free 2 hour training

Also check out the sum() and sqrt() functions. To square, use the caret:

term1 = sum(O) ^ 2

Multiplication is * and division is /. Not hard. Just take it one term at a time:

term1 = ....
term2 = ....
denominator = ....
rSquared = ( (term1 - term2 * term3) / denominator) ^2

Or you can simply use the built in functions for mse() and corrcoef().

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Image Analyst 2021-6-23

在 MATLAB Online 中打开

Sure we can help you but all you gave was a partial snippet of one of your attempts, which was just a partial snippet of my answer above:

function [term1 , term2] = stat(o , t)
term1=...
term2=...
end

It seems you forgot to upload your entire two code attempts so how can I comment on them? So I guess my answer stands as-is until you upload your code. Come on, you can do it, you're a smart engineer. It sounds like homework, and if so I'm sure your instructor didn't just say "See if someone in the Answers forum can do your homework problem for you."

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