Bar-Mekko charts also analyze data against the X and Y axis. The difference is that Bar-mekkos look only at one segment of data. There are both single variable and double variable Bar-mekkos. There are two types of Bar-mekko charts, single and double variable, which is defined by the number of data series plotted. To create double-variable Bar-mekko you must add a bar width row to the data spreadsheet.