How to hide points on the chart axis
To hide some points in the Excel 2013 chart axis, do the following:
1. Right-click in the axis and choose Format Axis... in the popup menu:
2. On the Format Axis task pane, in the Number group, select Custom category and then change the field Format Code:
# ###;- # ###;;
The first applies to positive values, the second to negative values, and the third to zero (for more details see Conditional formatting of chart axes).
3. Click the Add button.