If I have multiple function, then how can I get the function of min(fun1,fun2,fun3,...)?

If there are functions like

R1(x), R2(x), R3(x), R4(x)

then when I need to draw new funcion graph that show the min value function for x

like

min(x)= min(R1(x),R2(x),...)

how can I code this function?

Answer 1

[Vladimir Sovkov]

xmin=min([R1(x(:)');R2(x(:)');...]); % to get a correct result, the argument must be a row-vector: x(:)' turns any input array to it; do not use "min" for your inner variables as it is the name of the inbuilt matlab function
plot(x,xmin,'.-');

[Vladimir Sovkov]

The very first version was erronious. Get the current corrected version.