# 6.31.4. element envelope recorder command¶

recorder('EnvelopeElement', '-file', filename, '-xml', filename, '-binary', filename, '-precision', nSD=6, '-timeSeries', tsTag, '-time', '-dT', deltaT=0.0, '-closeOnWrite', '-ele', *eleTags=[], '-eleRange', startEle, endEle, '-region', regionTag, *args)

The Envelope Element recorder type records the response of a number of elements at every converged step. The response recorded is element-dependent and also depends on the arguments which are passed to the setResponse() element method. When the object is terminated, through the use of a wipe, exit, or remove the object will output the min, max and absolute max values on 3 seperate lines of the output file for each quantity.

 filename (str) name of file to which output is sent. file output is either in xml format ('-xml' option), textual ('-file' option) or binary ('-binary' option) which must pre-exist. nSD (int) number of significant digits (optional) '-time' (str) using this option places domain time in first entry of each data line, default is to have time ommitted, (optional) '-closeOnWrite' (str) using this option will instruct the recorder to invoke a close on the data handler after every timestep. If this is a file it will close the file on every step and then re-open it for the next step. Note, this greatly slows the execution time, but is useful if you need to monitor the data during the analysis. (optional) deltaT (float) time interval for recording. will record when next step is deltaT greater than last recorder step. (optional, default: records at every time step) tsTag (int) the tag of a previously constructed TimeSeries, results from node at each time step are added to load factor from series (optional) eleTags (list (int)) list of tags of elements whose response is being recorded (optional) startEle (int) tag for start node whose response is being recorded (optional) endEle (int) tag for end node whose response is being recorded (optional) regionTag (int) a region tag; to specify all nodes in the previously defined region. (optional) args (list) arguments which are passed to the setResponse() element method

Note

The setResponse() element method is dependent on the element type, and is described with the element() Command.