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#include "defines.h"
/*--------------- vstd ---------------*/
static t_class *vstd_class;
typedef struct _vstd
{
t_object x_obj;
} t_vstd;
static void vstd_perform(t_vstd *x, t_symbol *s, int argc, t_atom *argv)
{
t_float sumsq=0.0f;
t_float sum=0.0f;
int i;
for (i = 0; i < argc; i++)
{
t_float tmp=atom_getfloat(&argv[i]);
sumsq+= tmp*tmp;
sum+=tmp;
}
sumsq/=argc;
sum/=argc;
outlet_float(x->x_obj.ob_outlet, (t_float)sqrtf(sumsq-sum*sum));
if (s) {} // prevent compiler complaint
}
static void *vstd_new()
{
t_vstd *x=(t_vstd *)pd_new(vstd_class);
outlet_new(&x->x_obj, gensym("float"));
return (void *)x;
}
void vstd_setup(void)
{
vstd_class = class_new(gensym("vstd"),
(t_newmethod)vstd_new, 0,
sizeof(t_vstd),
CLASS_DEFAULT,
0);
class_addlist(vstd_class, (t_method)vstd_perform);
}
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