assert_isapprox

Check that computed and expected values are approximately equal.

Syntax

• assert_isapprox(computed, expected)
• assert_isapprox(computed, expected, precision)
• res = assert_isapprox(computed, expected, precision)
• [res, msg] = assert_isapprox(computed, expected, precision)

Input argument

• computed - a value: numeric matrix, sparse double, a multidimensional matrix
• expected - a value: numeric matrix, sparse double, a multidimensional matrix
• expected - a double value. default precision is 0.

Output argument

• res - a logical value
• msg - a string value, the error message. If res == true, then errormsg == ''. If res == false, then msg contains the error message.

Description

assert_isapprox raises an error if computed value is not approximately equal to expected value.

This function compares two floating point numbers, which allows to check that two numbers are "approximately" equal, i.e. that the relative error is small.

Used function(s)

isapprox

Examples

assert_isapprox(1.23456, 1.23457, 1e-5)

assert_isapprox(1.23456, 1.23457, 1e-6)

[r, msg] =assert_isapprox(1.23456, 1.23457, 1e-6)
assert_isfalse(r);
assert_isequal(msg, _('Assertion failed: expected and computed values are too different.'));

See also

isapprox.

History

Author

Allan CORNET