title: valid value for kernel type in statsmodel's kernel regression package
body: <p>In statsmodels.nonparametric.kernel_regression.KernelReg class, we have one parameter called ckertype which is used for user to specify kernel name. (I think by default the value is &quot;gaussian&quot;). I want to ask what else valid values for such ckertype parameter ? It seems the official documents is missing that part. I actually want to specify a &quot;uniformed&quot; distribution for such parameter, anyone can guide me how to do that please ?</p>
  <p><a href="https://www.statsmodels.org/dev/generated/statsmodels.nonparametric.kernel_regression.KernelReg.html" rel="nofollow noreferrer">https://www.statsmodels.org/dev/generated/statsmodels.nonparametric.kernel_regression.KernelReg.html</a></p>