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How do I fill left part of x=300 straight line with red colour and right part with green colour?

ContourPlot[x == 300, {x, 90 Pi, 150 Pi}, {y, 0, 4 Pi}]
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    $\begingroup$ ContourPlot[x, {x, 90 Pi, 150 Pi}, {y, 0, 4 Pi}, Contours -> {300}, ContourShading -> {Red, Green}] $\endgroup$
    – Bob Hanlon
    Commented Mar 27, 2021 at 22:29
  • $\begingroup$ It worked, Thanks. $\endgroup$
    – Sahabub Jahedi
    Commented Mar 29, 2021 at 13:24

1 Answer 1

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Try

Show[
  ContourPlot[x==300,{x,90 Pi,150 Pi},{y,0,4 Pi}],
  Plot[4 Pi,{x,90 Pi,300},PlotRange->{0,4 Pi},Filling->Axis,FillingStyle->Red],
  Plot[4 Pi,{x,300,150 Pi},PlotRange->{0,4 Pi},Filling->Axis,FillingStyle->Green]
]

Mathematica graphics

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