Making a array that gives me this kind of data...?

I want to write a code with given xp, x1 and depth values that can give me value of y axis with given x.

I want a code to which if I give x, it provides me with value of y and y should be as given in above photo.

My attept:

clear; clc;
xp = 100;
x1 = 50;
dx = 0.2;
depth = 1;

all_x = -xp:dx:xp;

y1 = linspace(0,0,length( [-xp:dx:-x1] ) )
y2 = ???
y3 = linspace(0,0,length( [x1:dx:xp] ) )

all_y = [y1 y2 y3];

I am unable to write a relation for y2

Answer 1

[Stephen23]

>> xp=5;
>> x1=1.5;
>> depth=2.3;
>> Xv = -xp:0.1:xp;
>> Yv = min(0,depth*abs(Xv)/x1 - depth);
>> plot(Xv,Yv,'-*')

[Luqman Saleem]

thank you