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Fix norm and add test of it

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This commit is contained in:
Iaroslav Postovalov 2020-08-11 15:06:53 +07:00
parent 8ab8864227
commit 837150b5eb
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2 changed files with 8 additions and 2 deletions
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2
kmath-core/src/commonMain/kotlin/scientifik/kmath/operations/Complex.kt
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@ -153,7 +153,7 @@ object ComplexField : ExtendedField<Complex>, Norm<Complex, Complex> {
*/
operator fun Double.times(c: Complex): Complex = Complex(c.re * this, c.im * this)
override fun norm(arg: Complex): Complex = arg.conjugate * arg
override fun norm(arg: Complex): Complex = sqrt(arg.conjugate * arg)
override fun symbol(value: String): Complex = if (value == "i") i else super.symbol(value)
}

8
kmath-core/src/commonTest/kotlin/scientifik/kmath/operations/ComplexFieldTest.kt
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@ -1,6 +1,7 @@
package scientifik.kmath.operations
import kotlin.math.*
import kotlin.math.PI
import kotlin.math.abs
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertTrue
@ -64,4 +65,9 @@ internal class ComplexFieldTest {
ComplexField { i * 8 }.let { it.im.toInt() to it.re.toInt() },
ComplexField { Complex(2, 2) pow 2 }.let { it.im.toInt() to it.re.toInt() })
}
@Test
fun testNorm() {
assertEquals(2.toComplex(), ComplexField { norm(2 * i) })
}
}