Mathematica 7 compares to other languages

Bakul Shah bakul+usenet at bitblocks.com
Thu Dec 11 01:12:02 CET 2008


John W Kennedy wrote:
> Xah Lee wrote:
>> In lisp, python, perl, etc, you'll have 10 or so lines. In C or Java,
>> you'll have 50 or hundreds lines.
> 
> C:
> 
> #include <stdlib.h>
> #include <math.h>
> 
> void normal(int dim, float* x, float* a) {
>    float sum = 0.0f;
>    int i;
>    float divisor;
>    for (i = 0; i < dim; ++i) sum += x[i] * x[i];
>    divisor = sqrt(sum);
>    for (i = 0; i < dim; ++i) a[i] = x[i]/divisor;
> }
> 
> Java:
> 
> static float[] normal(final float[] x) {
>    float sum = 0.0f;
>    for (int i = 0; i < x.length; ++i) sum += x[i] * x[i];
>    final float divisor = (float) Math.sqrt(sum);
>    float[] a = new float[x.length];
>    for (int i = 0; i < x.length; ++i) a[i] = x[i]/divisor;
>    return a;
> }
> 
> 

q){x%sqrt sum x}3 4
0.6 0.8



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