error in creating rock, paper, scissors game

%game conditions

user_play = input('chose R for rock, P for paper, S for scissors:');

%randomness

for comp_play = randi(imax,n)

imax = 3;

n = 1;

randi(imax,n)

1 == R;

2 == P;

3 == S;

end

% results

if user_play == R && comp_play == P || user_play == P && comp_play == S || user_play == S && comp_play == R

result = 'Computer win';

elseif comp_play == R && user_play == P || comp_play == P && user_play == S || comp_play == S && user_play == R

result = 'User win';

else comp_play == R & user_play == R | comp_play == P & user_play == P | comp_play == S & user_play == S;

result = 'Tie';

end

I wrote this code a couple days ago and I was able to successful play the game. I tried to code it so that it would rerun until x number of games was won but I couldn't get it to work. I removed that code and now when I try to input a selection for rock paper or scissors this error code pops up.

Error using input

Unrecognized function or variable 'R'.

Error in RPS_simulator (line 3)

user_play == input('chose R for rock, P for paper, S for scissors:');

I then get stuck in a loop of matlab asking me to pick R,P, or S and that error occuring.

Answer 1

[Image Analyst]

Hints:

choices = {'R', 'P', 'S'}
computersChoice = choices{randi([1 3])}
user_play = input('Choose R for rock, P for paper, or S for scissors : ', 's'); 
if contains(user_play, 'R', 'IgnoreCase', true)
    % User chose Rock.
elseif contains(user_play, 'P', 'IgnoreCase', true)
    % User chose Paper.
elseif contains(user_play, 'S', 'IgnoreCase', true)
    % User chose Scissors.
end

Make the obvious modifications.