Question

while calculating relative error, if the true value is not given, can we use the measured value?

Answer 1

Answer:

How do I calculate relative error when the true value is zero?

Say I have xtrue=0 and xtest. If I define relative error as:

relative error=xtrue−xtestxtrue

Then the relative error is always undefined. If instead I use the definition:

relative error=xtrue−xtestxtest