How to normalize the spectra by 650 nm?

sorry, I can't find the answer about this way to normalize the spectra at a certainly wavelength. Like this：

Answer 1

[Stephan]

Hi,

you might want to use the normalize function:

result = normalize(A,'range')

Best regards

Stephan

[Wei-Chien Hu]

Thank for your comment. I think it can do it.

But now i have another question at here.

The "normalize.m" is empty.

Do i need to download the newest version for Matlab? (my matlab version is R2017b)

[Stephan]

Does it work? In R2019a it can be found here:

\MATLAB\R2019a\toolbox\matlab\datafun\normalize.m

[Wei-Chien Hu]

Thank you for your help.

Finally, I divided all data by data value of 650nm.

result = all_data ./ data_650; 

This can do it, too.

Hope this can help everyone who can't use "normalize.m" function.