- Specify a variable in the variable name input area of the variable viewer. The name must be unique
or you will be asked to overwrite the existing variable. - Click the CVAR button in the calculator area of the variable viewer. The following dialog box appears.
- Select the variables to operate on from one or both of the pull down lists (corresponds to the IA,IB
argument for the CVAR command). - Select the type of response to be calculated (corresponds to the ITYPE argument for the CVAR
command). - Choose whether to calculate the covariance with respect to the absolute value or relative to the
base (corresponds to the DATUM argument for the CVAR command). - Click OK to save your preferences and close the dialog box. The function cvar(IA,IB,ITYPE,DATUM)
will be displayed in the expression area of the calculator. - Click Enter in the calculator portion of the variable viewer to start the evaluation.
When the evaluation is finished, the covariance value is stored; the variable name is displayed in the
variable list area for further postprocessing.
8.8.1.1.2. Response PSD.
Follow these steps to calculate the Response PSD using the variable viewer.
- Select “Create response power spectral density (PSD)” from the Spectrum Usage dialog box and
click OK. - Using the Variable Viewer, define the variables for which the Response PSD is to be calculated.
- Specify a variable in the variable name input area of the variable viewer. The name must be unique
or you will be asked to overwrite the existing variable. - Click the RPSD button in the calculator area of the variable viewer. The following dialog box appears.
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationAdditional Time-History Postprocessing