Re: [Scilab-users] bug in degree and polynomials comparison ?
Le 20/08/2018 à 17:50, Samuel Gougeon a écrit : > Hello Philippe, > > This is fixed in Scilab 6.0.2-. Please see mainly > http://bugzilla.scilab.org/14701 > http://bugzilla.scilab.org/14708 thanks Samuel, I missed those reports on bugzilla Best regards, Philippe ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] bug in degree and polynomials comparison ?
Hello Philippe, This is fixed in Scilab 6.0.2-. Please see mainly http://bugzilla.scilab.org/14701 http://bugzilla.scilab.org/14708 Regards Samuel Le 20/08/2018 à 17:27, philippe a écrit : Hi, while upgrading one of my toolboxes I discovered a strange error in polynomial comparisons. The error appeared during automatic unit tests, a " assert_checkequal(P1,P2)" was expected to be True and was in fact False. After some investigations It looks like there is an error in degree so that P1==P2 can be False while P1-P2==0. Can someone confirm the bug in scilab-6.0.1 before I fill in a report on bugzilla. Run the following commands : X=poly(0,'x') A=(X-1)^3 B=(X+1)^2 R=20 +12*X Q=(A-R*X^3)/B; Q=Q.num A,(B*Q+R*X^3) // equal A-(B*Q+R*X^3) //=0 A==(B*Q+R*X^3) // %F coeff((B*Q+R*X^3)) coeff(A) degree((B*Q+R*X^3)) // =4 !! degree(A) // = 3 and compare with the expected result thereafter Sincerly yours, Philippe --> A,B,Q,R A = 2 3 -1 +3x -3x +x B = 2 1 +2x +x Q = 2 -1 +5x -12x R = 20 +12x --> A,(B*Q+R*X^3) A = 2 3 -1 +3x -3x +x ans = 2 3 -1 +3x -3x +x --> A-(B*Q+R*X^3) ans = 0 --> A==(B*Q+R*X^3) ans = F --> coeff((B*Q+R*X^3)) ans = -1. 3. -3. 1. 0. --> coeff(A) ans = -1. 3. -3. 1. --> degree((B*Q+R*X^3)) ans = 4. --> degree(A) ans = 3. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
[Scilab-users] bug in degree and polynomials comparison ?
Hi, while upgrading one of my toolboxes I discovered a strange error in polynomial comparisons. The error appeared during automatic unit tests, a " assert_checkequal(P1,P2)" was expected to be True and was in fact False. After some investigations It looks like there is an error in degree so that P1==P2 can be False while P1-P2==0. Can someone confirm the bug in scilab-6.0.1 before I fill in a report on bugzilla. Run the following commands : X=poly(0,'x') A=(X-1)^3 B=(X+1)^2 R=20 +12*X Q=(A-R*X^3)/B; Q=Q.num A,(B*Q+R*X^3) // equal A-(B*Q+R*X^3) //=0 A==(B*Q+R*X^3) // %F coeff((B*Q+R*X^3)) coeff(A) degree((B*Q+R*X^3)) // =4 !! degree(A) // = 3 and compare with the expected result thereafter Sincerly yours, Philippe --> A,B,Q,R A = 2 3 -1 +3x -3x +x B = 2 1 +2x +x Q = 2 -1 +5x -12x R = 20 +12x --> A,(B*Q+R*X^3) A = 2 3 -1 +3x -3x +x ans = 2 3 -1 +3x -3x +x --> A-(B*Q+R*X^3) ans = 0 --> A==(B*Q+R*X^3) ans = F --> coeff((B*Q+R*X^3)) ans = -1. 3. -3. 1. 0. --> coeff(A) ans = -1. 3. -3. 1. --> degree((B*Q+R*X^3)) ans = 4. --> degree(A) ans = 3. ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
