The number of rows equals the number of columns in the heatmap. However, it can happen, that the entire last row is unused ( plus some squares of the second last row). In that case, the heatmap was wrong, as the last row was omitted and the second last got more entries than there are columns which led to a false rendering of the map...
The number of rows equals the number of columns in the heatmap. However, it can happen, that the entire last row is unused ( plus some squares of the second last row). In that case, the heatmap was wrong, as the last row was omitted and the second last got more entries than there are columns which led to a false rendering of the map...