To fix this bug [Y axis coarse on some traces](https://easyeda.com/bbs_view_640.htm) The bug is caused by third part free open source code <http://dygraphs.com/>. Ngspice's simualtion resuilt with many figures. So help me to find a way to make Ngspice just out put the right figures. When I search "precision" in ngspice help file, I can't get enough info. Just confige for Meas NGSPICE_MEAS_PRECISION default: 5 Sets the number of digits if output values are printed by the meas(ure) command. So Can you find a configue for OP tran in Ngspice? If can't , We should modify the Ngspice source codes? The test netlist New Schematic 2 .op V1 Vout GND 5.123456789012345678 R1 Vout GND 1k .save V(Vout) .END` I hope we can get the Vout is 5.1235 Thanks.