Thanks, but you are unfortunately addressing the wrong community / mailing list.
Please contact the Apache Commons project directly. See http://commons.apache.org/mail-lists.html Cheers Niclas On Thu, Apr 21, 2016 at 4:51 AM, . <mdzafir.alv...@gmail.com> wrote: > ---------- Forwarded message ---------- > From: . <mdzafir.alv...@gmail.com> > Date: Thu, Apr 21, 2016 at 2:35 AM > Subject: Request for correcting wrong Information on website > To: apa...@apache.org > > > Dear site admin , > I was browsing this page below : > https://commons.apache.org/proper/commons-math/userguide/complex.html > > Between /* */ I am copy pasting some lines from the page . After this /**/ > mark i will post error and corrections > > /* > > The Complex class provides basic unary and binary complex number > operations. These operations provide the means to add, subtract, multiply > and divide complex numbers along with other complex number functions > similar to the real number functions found in java.math.BigDecimal: > > Complex lhs = new Complex(1.0, 3.0); > Complex rhs = new Complex(2.0, 5.0); > > Complex answer = lhs.add(rhs); // add two complex numbers > answer = lhs.subtract(rhs); // subtract two complex numbers > answer = lhs.abs(); // absolute value > answer = lhs.conjugate(rhs); // complex conjugate > > 7.3 Complex Transcendental Functions > > Complex > < > https://commons.apache.org/proper/commons-math/apidocs/org/apache/commons/math3/complex/Complex.html > > > also > provides implementations of serveral transcendental functions involving > complex number arguments. These operations provide the means to compute the > log, sine, tangent, and other complex values : > > Complex first = new Complex(1.0, 3.0); > Complex second = new Complex(2.0, 5.0); > > Complex answer = first.log(); // natural logarithm. > answer = first.cos(); // cosine > answer = first.pow(second); // first raised to the power of second > > */ > > > > > > First error : > > see the line : ------> answer = lhs.abs(); // absolute value > > > > answer was declared in complex previously , so you must capture the > reply of lhs.abs() to a double variable > > correct: > > double answer = lhs.abs(); > or > double ans = lhs.abs(); // we have already declared a variable name > //answer , so save this with a variable of different name > > > Error 2 : > > see this line --> > > > answer = lhs.conjugate(rhs); // complex conjugate > > > Note that , Conjugate is a one input function , If z = 2+3i is a > complex , conjugate is 2-3i , Here you pushed 2 complex ( lhs , rhs ) > instead of one conjugate ( either lhs or rhs ) . So this generates error > > Correct : > > either : > > answer = lhs.conjugate(); > > or: > > answer = rhs.conjugate(); > > both are correct If you think by chance I am wrong , you can even check > javadoc of your library , everything was correct there , but the example on > this web is wrong only. Thats all I had to say. I am a great fan of your > library Apache Commons Math 3.6.1 I was working on a project , in this > project I needed to use common math .jar . It helped me a lot by saving > time of many hard implementations . As a fan , I request you to correct > this information as soon as possible . Thanks in advanced . - From one of > your fans - Alvi > -- Niclas Hedhman, Software Developer http://zest.apache.org - New Energy for Java
