Function that returns the Error

Question

Lauren Passio 2021-3-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/782913-function-that-returns-the-error

回答： Walter Roberson 2021-3-25

I have to assign variable names to the following items:

Exact solution is 15.7214
Current approximation of the solution is 15.7813
Previous approximation of the solution is 15.9375

Than I have to write a function that returns the Relative True Error using TRE = 100*abs((exact-approx)/exact) and another function that returns the Absolute Relative Error using ARE= 100*abs((new-old)/new). I need to get the code correct before putting it into a function. I can only use:

abs()
function
for-end
fprintf
if-elseif-else-end
input
plot
size()
while-end
fprintf

The code I have so far is:

exact_sol = 15.7214;
current_approx_of_sol = 15.7813;
previous_approx_of_sol = 15.9375;
TRE = 100*abs((exact_sol-current_approx_of_sol)/exact_sol);
fprintf("The relative true error is %2.2g. \n", TRE)
ARE = 100*abs((new-previous_approx_of_sol)/new);
fprintf("The absolute relative error is %2.2g. \n", ARE)