Covariance Matrix Export

The covariance matrix for the current fit can be saved to a file for use in other programs. The Save Covariance Matrix option in the File menu of the Curve-Fit graph saves the covariance matrix as an ASCII file and then displays the data in this file using TableCurve 2D's text file viewer.

The covariance matrix is the inverse matrix multiplied by the square of the standard error of fit (MSE). The diagonal elements thus contain the variances for the individual parameters. The off-diagonal elements contain the covariances between the parameters.

If you wish to import the covariance matrix into a spreadsheet, simply select the Copy option in the Edit menu of the text file window that the displays the file contents. You may need to use a Paste Special or similar option within your spreadsheet and then specify the WK1 clipboard format for the import.