commons-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From sebb <seb...@gmail.com>
Subject Re: svn commit: r762116 - in /commons/proper/math/trunk/src/java/org/apache/commons/math: ./ analysis/polynomials/ analysis/solvers/ estimation/ ode/ ode/nonstiff/ ode/sampling/ optimization/ random/ stat/ stat/descriptive/ stat/descriptive/moment/ s
Date Sun, 05 Apr 2009 18:20:13 GMT
On 05/04/2009, Phil Steitz <phil.steitz@gmail.com> wrote:
> sebb@apache.org wrote:
>
>  We need to be careful with removing all of these casts.  They were inserted
> earlier to eliminate some errors resulting from int/int computations in
> larger expressions resulting in incorrect values.   Could be later JDKs
> handle all of this seamlessly, but I would prefer to be safe rather than
> sorry here and leave the explicit casts from int/long to double alone.

I've just checked, and there are still some (double) casts left in the
code that Eclipse does not complain about, so I assume that Eclipse
distinguishes between casts that Java does anyway and casts that
affect the resulting code.

>  Phil
>
>
> > Modified:
> commons/proper/math/trunk/src/java/org/apache/commons/math/stat/regression/SimpleRegression.java
> > URL:
> http://svn.apache.org/viewvc/commons/proper/math/trunk/src/java/org/apache/commons/math/stat/regression/SimpleRegression.java?rev=762116&r1=762115&r2=762116&view=diff
> >
> ==============================================================================
> > ---
> commons/proper/math/trunk/src/java/org/apache/commons/math/stat/regression/SimpleRegression.java
> (original)
> > +++
> commons/proper/math/trunk/src/java/org/apache/commons/math/stat/regression/SimpleRegression.java
> Sun Apr  5 16:48:53 2009
> > @@ -124,11 +124,11 @@
> >         } else {
> >             double dx = x - xbar;
> >             double dy = y - ybar;
> > -            sumXX += dx * dx * (double) n / (double) (n + 1.0);
> > -            sumYY += dy * dy * (double) n / (double) (n + 1.0);
> > -            sumXY += dx * dy * (double) n / (double) (n + 1.0);
> > -            xbar += dx / (double) (n + 1.0);
> > -            ybar += dy / (double) (n + 1.0);
> > +            sumXX += dx * dx * n / (n + 1.0);
> > +            sumYY += dy * dy * n / (n + 1.0);
> > +            sumXY += dx * dy * n / (n + 1.0);
> > +            xbar += dx / (n + 1.0);
> > +            ybar += dy / (n + 1.0);
> >         }
> >         sumX += x;
> >         sumY += y;
> > @@ -157,11 +157,11 @@
> >         if (n > 0) {
> >             double dx = x - xbar;
> >             double dy = y - ybar;
> > -            sumXX -= dx * dx * (double) n / (double) (n - 1.0);
> > -            sumYY -= dy * dy * (double) n / (double) (n - 1.0);
> > -            sumXY -= dx * dy * (double) n / (double) (n - 1.0);
> > -            xbar -= dx / (double) (n - 1.0);
> > -            ybar -= dy / (double) (n - 1.0);
> > +            sumXX -= dx * dx * n / (n - 1.0);
> > +            sumYY -= dy * dy * n / (n - 1.0);
> > +            sumXY -= dx * dy * n / (n - 1.0);
> > +            xbar -= dx / (n - 1.0);
> > +            ybar -= dy / (n - 1.0);
> >             sumX -= x;
> >             sumY -= y;
> >             n--;
> > @@ -410,7 +410,7 @@
> >         if (n < 3) {
> >             return Double.NaN;
> >         }
> > -        return getSumSquaredErrors() / (double) (n - 2);
> > +        return getSumSquaredErrors() / (n - 2);
> >     }
> >       /**
> > @@ -468,7 +468,7 @@
> >      */
> >     public double getInterceptStdErr() {
> >         return Math.sqrt(
> > -            getMeanSquareError() * ((1d / (double) n) + (xbar * xbar) /
> sumXX));
> > +            getMeanSquareError() * ((1d / n) + (xbar * xbar) / sumXX));
> >     }
> >       /**
> > @@ -589,7 +589,7 @@
> >     * @return the intercept of the regression line
> >     */
> >     private double getIntercept(double slope) {
> > -        return (sumY - slope * sumX) / ((double) n);
> > +        return (sumY - slope * sumX) / (n);
> >     }
> >       /**
> >
> > Modified:
> commons/proper/math/trunk/src/java/org/apache/commons/math/util/MathUtils.java
> > URL:
> http://svn.apache.org/viewvc/commons/proper/math/trunk/src/java/org/apache/commons/math/util/MathUtils.java?rev=762116&r1=762115&r2=762116&view=diff
> >
> ==============================================================================
> > ---
> commons/proper/math/trunk/src/java/org/apache/commons/math/util/MathUtils.java
> (original)
> > +++
> commons/proper/math/trunk/src/java/org/apache/commons/math/util/MathUtils.java
> Sun Apr  5 16:48:53 2009
> > @@ -307,7 +307,7 @@
> >             return 0;
> >         }
> >         if ((k == 1) || (k == n - 1)) {
> > -            return Math.log((double) n);
> > +            return Math.log(n);
> >         }
> >                 /*
> > @@ -337,12 +337,12 @@
> >           // n!/(n-k)!
> >         for (int i = n - k + 1; i <= n; i++) {
> > -            logSum += Math.log((double) i);
> > +            logSum += Math.log(i);
> >         }
> >           // divide by k!
> >         for (int i = 2; i <= k; i++) {
> > -            logSum -= Math.log((double) i);
> > +            logSum -= Math.log(i);
> >         }
> >           return logSum;      @@ -523,7 +523,7 @@
> >         }
> >         double logSum = 0;
> >         for (int i = 2; i <= n; i++) {
> > -            logSum += Math.log((double)i);
> > +            logSum += Math.log(i);
> >         }
> >         return logSum;
> >     }
> >
> > Modified:
> commons/proper/math/trunk/src/java/org/apache/commons/math/util/TransformerMap.java
> > URL:
> http://svn.apache.org/viewvc/commons/proper/math/trunk/src/java/org/apache/commons/math/util/TransformerMap.java?rev=762116&r1=762115&r2=762116&view=diff
> >
> ==============================================================================
> > ---
> commons/proper/math/trunk/src/java/org/apache/commons/math/util/TransformerMap.java
> (original)
> > +++
> commons/proper/math/trunk/src/java/org/apache/commons/math/util/TransformerMap.java
> Sun Apr  5 16:48:53 2009
> > @@ -79,7 +79,7 @@
> >      * @return the mapped NumberTransformer or null.
> >      */
> >     public NumberTransformer getTransformer(Class<?> key) {
> > -        return (NumberTransformer) map.get(key);
> > +        return map.get(key);
> >     }
> >       /**
> >
> >
> >
> >
>
>
> ---------------------------------------------------------------------
>  To unsubscribe, e-mail: dev-unsubscribe@commons.apache.org
>  For additional commands, e-mail: dev-help@commons.apache.org
>
>

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@commons.apache.org
For additional commands, e-mail: dev-help@commons.apache.org


Mime
View raw message