Type of Transformation Select the type of transformation to perform on the specified variables . The types of transformation are summarized in the following table: Transformation Description (blank) No transformation exp2 Exponential (base 2) exp Exponential (base e ) exp10 Exponential (base 10) log2 Logarithm (base 2) log Logarithm (base e ) log10 Logarithm (base 10) neglog2 Negative logarithm (base 2) neglog Negative logarithm (base e ) neglog10 Negative logarithm (base 10) recipexp2 Reciprocal exponential (base 2) recipexp Reciprocal exponential (base e ) recipexp10 Reciprocal exponential (base 10) sqrt Square root To Specify a Transformation Type: Left-click one of the choices in the Type of Transformation drop-down menu.