score:0

Accepted answer

try this

haxis: {
  baselinecolor: 'black',
  ticks: []
},
vaxis: {
  baselinecolor: 'black',
  ticks: []
}

the baseline for the haxis is a vertical line and the baseline for the vaxis is a horizontal line. so if you want to remove the horizontal black line you need to set the vaxis baselinecolor and vice-versa.


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