@Substitution(name='ewm')
    @Appender(_doc_template)
    @Appender(_bias_template)
    def std(self, bias=False, **kwargs):
        return _zsqrt(self.var(bias=bias, **kwargs))
Export file of CpG density
dataset/ETHPy150Open pydata/pandas/pandas/core/window.py/EWM.std--crossover with--dataset/ETHPy150Open CGATOxford/cgat/obsolete/pipeline_proj007.py/exportTranscriptTSSCpGDensity