# [Scilab-users] Plot Heart Curve in Scilab

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## [Scilab-users] Plot Heart Curve in Scilab

 Hello, I've been looking at the forum, how to graph the following function: x2=[-2:0.01:2];x1=[-1:0.01:1]; function val = Heart(x1, x2)     val=(1.2*x2-sqrt(abs(x1)))^2+x1^2-1; endfunction And I have not found anything to guide me. Please, could you help me? Gracias -- Sent from: http://mailinglists.scilab.org/Scilab-users-Mailing-Lists-Archives-f2602246.html_______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users
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## Re: Plot Heart Curve in Scilab

 Hi Hermes,   One simple way is to display the 0-contour level of your “heart” function:   `// START OF CODE` `nx = 300;` `ny = 200;` `X0 = linspace(-1.2,1.2,nx);` `Y0 = linspace(-1.5,2,ny);` `X= X0.*.ones(ny,1);` `Y= (Y0.*.ones(nx,1))';` `Z = (1.2*Y - sqrt(abs(X))).^2 + X.^2 - 1;  // Heart function` `clf()` `a=gca();` `a.x_label.text=" X";` `a.y_label.text=" Y";` `contour(X0,Y0,Z',[0  0]);` `a.view = "2d";` `// END OF CODE`   Exercise:  fill it in red…   Regards, Rafael   -----Original Message----- From: users [mailto:[hidden email]] On Behalf Of Hermes Sent: Tuesday, September 26, 2017 9:48 AM To: [hidden email] Subject: [Scilab-users] Plot Heart Curve in Scilab   Hello, I've been looking at the forum, how to graph the following function:   x2=[-2:0.01:2];x1=[-1:0.01:1]; function val = Heart(x1, x2)     val=(1.2*x2-sqrt(abs(x1)))^2+x1^2-1; endfunction   And I have not found anything to guide me. Please, could you help me?     Gracias       -- _______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users _______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users
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## Re: Plot Heart Curve in Scilab

 Hi Rafa, Here I present the task solved: //start of code nx=300; ny=200; X0=linspace(-1.2,1.2,nx); Y0=linspace(-1.5,2,ny); X=X0.*.ones(ny,1); Y=(Y0.*.ones(nx,1))'; Z=(1.25*Y-sqrt(abs(X))).^2+X.^2-1; clf() a=gca(); a.x_label.text="X"; a.y_label.text="Y"; contour(X0,Y0,Z',[0,0]); *Polyline=a.children.children(1) Polyline.fill_mode="on"; Polyline.foreground=5; Polyline.background=5; Polyline.thickness=2;* a.view="2d"; //end code Two questions: in the Helps of Scilab, where can I find the hierarchy trees for the graphic objects? How do I copy from SciNote to the Forum scripts and maintain the format of it? Thank you Hermes -- Sent from: http://mailinglists.scilab.org/Scilab-users-Mailing-Lists-Archives-f2602246.html_______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users
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## Re: Plot Heart Curve in Scilab

 Hermes For the second question, use email program with html format. Regards Rafael From: users <[hidden email]> on behalf of Hermes <[hidden email]> Sent: Wednesday, September 27, 2017 10:28:55 PM To: [hidden email] Subject: Re: [Scilab-users] Plot Heart Curve in Scilab   Hi Rafa, Here I present the task solved: //start of code nx=300; ny=200; X0=linspace(-1.2,1.2,nx); Y0=linspace(-1.5,2,ny); X=X0.*.ones(ny,1); Y=(Y0.*.ones(nx,1))'; Z=(1.25*Y-sqrt(abs(X))).^2+X.^2-1; clf() a=gca(); a.x_label.text="X"; a.y_label.text="Y"; contour(X0,Y0,Z',[0,0]); *Polyline=a.children.children(1) Polyline.fill_mode="on"; Polyline.foreground=5; Polyline.background=5; Polyline.thickness=2;* a.view="2d"; //end code Two questions: in the Helps of Scilab, where can I find the hierarchy trees for the graphic objects? How do I copy from SciNote to the Forum scripts and maintain the format of it? Thank you Hermes -- Sent from: http://mailinglists.scilab.org/Scilab-users-Mailing-Lists-Archives-f2602246.html _______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users _______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users