@identity Identity matrix

@ifirst Index of the first non-missing value in the vector or series.

@iif Recode values by condition (conditional value).

@ilast Index of the last non-missing value in the vector or series.

@imax Index of maximum value.

@imaxes Indices of maximum value (multiple).

@imin Index of minimum value.

@imins Indices of minimum value (multiple).

@implode Creates sym from lower triangle of square matrix.

@implodeu Creates sym from upper triangle of square matrix.

@inlist Dummy variable for observation value in list.

@inner Inner product.

@insert Insert string into string.

@instr Find position of substring in a string.

@intercept Intercept from a trend regression.

@inv Reciprocal function.

@inverse Inverse of matrix.

@isempty Test for empty string.

@isna Test for missing values.

@isobject Does object exist in active workfile page.

@ispanel Is the current workfile page panel structured.

@isperiod is this the first observation matching the specified period.

@issingular Test matrix for singularity.

@isvalidgroup Does the string represent a valid EViews group or auto-series.

@isvalidname Indicator for whether string represents a valid name for an EViews object.