Troubles plotting y==0 using fimplicit
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Zdenek Hurak
el 16 de Feb. de 2021
Respondida: Raynier Suresh
el 19 de Feb. de 2021
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/521617/image.png)
syms x y
fimplicit([x==0,y==0])
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/521622/image.png)
Apparently, the solution set for the second equation (y==0) is not plotted correctly. If x is understood by the function as the horizontal axis, which is suggested by seeing a vertical graph for the x==0 equation, the graph for the y==0 equation should be a horizontal line and it is not:
fimplicit(y==0)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/521627/image.png)
Strangely enough, if the function definining the equation is only slightly perturbed, the problem dissapears
fimplicit(y+10e-8*x==0)
axis([-5 5 -5 5])
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/521632/image.png)
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Respuesta aceptada
Raynier Suresh
el 19 de Feb. de 2021
Hi, you could try the below code
fimplicit(@(x,y) x);hold on;fimplicit(@(x,y) y)
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