confint
Confidence intervals for fit coefficients of cfit
or
sfit
object
Description
returns 95% confidence bounds ci
= confint(fitresult
)ci
on the coefficients
associated with the cfit
or sfit
object
fitresult
. fitresult
must be an output
from the fit
function to contain the
necessary information for ci
. ci
is a
2-by-n
array where n =
numcoeffs(fitresult)
. The top row of ci
contains the lower bound for each coefficient; the bottom row contains the upper
bound.
Examples
Input Arguments
Output Arguments
Tips
To calculate confidence bounds, confint
uses
R-1 (the inverse
R factor from QR decomposition of the
Jacobian), the degrees of freedom for error, and the root mean squared error. This
information is automatically returned by the fit
function and
contained within fitresult
.
If coefficients are bounded and one or more of the estimates are at their bounds, those estimates are regarded as fixed and do not have confidence bounds.
Note that you cannot calculate confidence bounds if
category(fitresult)
is 'spline'
or
'interpolant'
.
Version History
Introduced before R2006a