mean square error expected value

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zephr nine
zephr nine 2015-4-6
回答： Image Analyst 2015-5-28
how to write this in matlab?
Rz=E[z*z transpose]
and
Rz=E[(z-z bar)(z-z bar)tranpose]

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回答（4 个）

Mahdiyar
Mahdiyar 2015-4-6
Hi nine
If you are looking for Root Mean Square you can simply use command "rms". for more information write the following command in Command windows.
doc rms
Regards.
Star Strider
Star Strider 2015-4-6
Use the mean function and the complex-conjugate-transpose operator ('):
Rz = mean(z(:)*z(:)');
and:
Rz = mean((z(:)-zbar)*(z(:)-zbar)');
The subscript colon ‘z(:)’ forces ‘z’ to be a column vector, so you will not get an error if you give it ‘z’ a a row vector.
ojasvi
ojasvi 2015-5-27
hi, i have an emg data. first i rectify the signal and then i have to the RMS, how i can i do this. any code for help
Image Analyst
Image Analyst 2015-5-28
If you have the Image Processing Toolbox, simply use the function immse(). It works for 1-D "images/signals, as well as 2D images.

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