This dataset contains data for the figures published in: M. K. Kalkowski, E. Rustighi, T. P. Waters, ' Modelling piezoelectric excitation in waveguides using the semianalytical finite element method' published in Computers & Structures 2016. If using the data in any form, please cite them using the doi: 10.5258/SOTON/392801 (http://dx.doi.org/10.5258/SOTON/392801). Data for figures are gathered in ASCII text files (one per each figure). Data section of each file has a form of a comma-separated table. Headings with units and descriptions are also given (lines starting with '#'). Whenever presenting data in a single table was found inconvenient, respective data series are put one below another with a separator of the form '#------