# Matlab error related performance metrics 1.0

OS : Windows / Linux / Mac OS / BSD / Solaris
Script Licensing : BSD - BSD License
Created : Sep 14, 2007
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## errperf(T,P,M) uses T and P, which are target and ...

errperf(T, P, M) uses T and P, which are target and prediction vectors respectively, and returns the value for M, which is one of several error related performance_metrics.
T and P can be row or column vectors of the same size. M can be one of the following performance metrics:
mae (mean absolute error)
mse (mean squared error)
rmse (root mean squared error)
mare (mean absolute relative error)
msre (mean squared relative error)
rmsre (root mean squared relative error)
mape (mean absolute percentage error)
mspe (mean squared percentage error)
rmspe (root mean squared percentage error)
EXAMPLE:
rand('state', 0)
T = [0:0. 2:1];
P = rand(size(T)). *T;
errperf(T, P, 'mae') returns 0. 1574
To compute the relevant performance metric, the function uses recursion to first compute one or more error vectors. The function can therefore secondarily be used to compute these error vectors. M can therefore also be one of the following:
e (errors)
ae (absolute errors)
se (squared errors)
re (relative errors)
are (absolute relative errors)
sre (squared relative errors)
pe (percentage errors)
ape (absolute percentage errors)
spe (squared percentage errors)
Demands:
• MATLAB Release: R2007a

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