Upper limit a symbolic vector

Hi,

I need to resolve the following problem:

I have a vector of input numbers (in) and I have to multiply it for a variable (a). My output (out) must be that vector that has an upper limit of 100 (clearly the output depends on the variable). Then I need to sum the vector "out" and divide it for "a" and plot the result in function of "a". I tried this way:

syms a
A=in*a;
out=min(A,100);
fun=sum(out)/a;
fplot(fun)

As far as I understand though I cannot run the "min" command because that instruction doesn't work on a symbolic vector. Anyway the error is:

Error using symengine
Input arguments must be convertible to floating-point numbers.

Error in sym/privBinaryOp (line 1030)
            Csym = mupadmex(op,args{1}.s, args{2}.s, varargin{:});

Error in sym/min (line 78)
        C = privBinaryOp(X, Y, 'symobj::zipWithImplicitExpansion', 'symobj::minComplex');
        

In case it's important for the help, the aim of the excersise is writing a mathematical function (fun) based on the variable "a"; the actual value of "a" will be determined only at the end minimizing the function "fun".

Thank you in advance

Answer 1

[Walter Roberson]

in = randi([-9 9], 1, 50)

in = 1×50

2 5 -5 4 5 -8 5 0 9 3 0 4 6 -7 -5 5 -3 9 5 -8 -6 8 2 -2 -1 6 -9 7 -3 0

Min = @(P,Q) arrayfun(@(p,q) piecewise(p <= q, p, q), P, Q);
syms a
A = in*a

A = 

out = Min(A,repmat(100,size(A)));
fun = sum(out)/a

fun = 

fplot(fun, [-100 100])