The example provided in the article demonstrates how to transpose the initially loaded data. The grid itself does not have a transposing functionality, thus any operations related to the grid won't work in this scenario.
Generally speaking it is possible to use widgets such as the filter and the pager, and connect them to a transposed grid. You can create 2 separate DataSources, one connected to the grid and one connected to the filter for example. When you apply filter/paging/sorting to the filterDataSource the change event is triggered. Inside the change event you can transpose the data and assign it to your grid's DataSource.
For the selection, you can handle the change event of the grid which is triggered any time a row is selected. Prevent the default behavior and instead apply selection to each of the column cells.
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