<h3>Data Gap</h3> Every parameter fromthe expression is preprocessed before expression evaluation. It is resampled (averaged or interpolated) with taking into account possible absence of data (data gaps). Here you may define 'gap threshold'. It is expressed inthe parameter 'sampling times. If data is absent fortime interval greater than this threshold the interval is treated as 'gap', otherwise the interval is filled withthe interpolated data. <br/>