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enter image description here

How can I know color the are of the parabola, say, of the positive x values? I'm using Inkscape for creating the figures.

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  • Hi but the graph it is done in LaTeX :-) and there are many solution directly in LaTeX to solve your problem.
    – Sebastiano
    May 29, 2021 at 21:16
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    @Sebastiano the huge advantage of inkscape is that you can create graphs or figures of any kind (especially good for differential geometry and topology) insanely quick.
    – Hilberto1
    May 29, 2021 at 21:20
  • I am agree with you. I use Adobe Illustrator to do quick improved for the code that I have created. I not understand the reason of your downvote.
    – Sebastiano
    May 29, 2021 at 21:22

2 Answers 2

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Solution: I just used the Bezier tool to fit the desired area under the curve and then filled this selected are with the colour of choice.

enter image description here

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  • Hi Hilberto, welcome to GDSE. Please don't forget to choose your own answer as best!
    – Billy Kerr
    May 29, 2021 at 18:51
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I would solve it this way:

  • draw a straight line to connect the curve with your x-axis (press F6 and keep Ctrl pressed to ensure the line is straight)
  • use the fill bounded areas tool (paintbucket icon, the U hotkey) by clicking anywhere on the enclosed area formed by the curve, the axis, and the line you just drew

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