Plotting a function which has two dependent variables and shows it with colour intensity

I apologize if someone asked similiar question before, but I tried to search it always comes out with two independent variables.

I would like to make a plot of the function like this, where y is a function of x, z is a function of x,y

x=[0,pi/2]

y=x^2+sinx

z=f(x,y)= ln(x+20)*y/(x+2y)

x=linspace(0,pi/2,50);
y=x.^2+sin(x);
z=(ln(x+20).*y)./(x+2*y);

and i tried to code the function directly, and I would like to plot it in 2D by showing x-y graph while the z is shown in color intensity (or 3D and I can rotate it)

I struggle it so much as I couldn't get more information from the website, as the most of them, the x,y variables are independent.

Trillion of Thanks in advance!!! Thank you!

[KSSV]

https://in.mathworks.com/matlabcentral/answers/5042-how-do-i-vary-color-along-a-2d-line

Answer 1

[Deepak Gupta]

Hi Wei,

Try plot3 or surf function to plot.