If I have functions written that require a user input, how would I test different points without copy and pasting the code over and over again?

Question

Japheth Gielen 2016-11-26

0
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https://ww2.mathworks.cn/matlabcentral/answers/314096-if-i-have-functions-written-that-require-a-user-input-how-would-i-test-different-points-without-cop

回答： Walter Roberson 2016-11-26

This is the code I have:

x = input('Type a value for x: ');
for i = 1:9
  vec(i) = (-1)^(i+1)*x^(2*i-1)/factorial(2*i-1);
end
exct = sin(x)
app = sum(vec)
err = abs(app - exct)
% ii 
app1 = 0;
for i = 1:100
  app1 = app1 + (-1)^(i+1)*x^(2*i-1)/factorial(2*i-1);
end
exct = sin(x)
app1
err1 = abs(app1 - exct)
app2 = 0;
for i = 1:250
  app2 = app2 + (-1)^(i+1)*x^(2*i-1)/factorial(2*i-1);
end
exct = sin(x)
app2
err2 = abs(app2 - exct)

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I would like to test this code for x = 2, 2.5, 3. My problem is that since x is defined as user input which is entered in the command window, how would I evaluate the code within the script at these points without retyping the code 3 times with the respective values of x that I am trying to test?