Документ взят из кэша поисковой машины. Адрес оригинального документа : http://hea-www.harvard.edu/ChaMPlane/quantile/pre-release/grid.sl Дата изменения: Fri Oct 21 21:24:37 2005 Дата индексирования: Tue Oct 2 08:04:29 2012 Кодировка: Поисковые слова: redshift survey

% JaeSub Hong, 2003-2005, version 1.5
% Please report any problem or suggestion at jaesub@head.cfa.harvard.edu

define imcounts (x,y) {

variable i,n_data;
variable ans;

n_data = length(y);
ans = Double_Type [n_data];

ans[0] = (x.hi[0]-x.lo[0])*y[0];
for (i=1;i ans[i] = (x.hi[i]-x.lo[i])*y[i]+ans[i-1];
}

for (i=0;i ans[i] = ans[i]/ans[n_data-1];
}

return ans;
}

define imcounts_raw (x,y) {

variable i,n_data;
variable ans;

n_data = length(y);
ans = Double_Type [n_data];

ans[0] = 1.0*y[0];
for (i=1;i ans[i] = 1.0*y[i]+ans[i-1];
}

for (i=0;i ans[i] = ans[i]/ans[n_data-1];
}

return ans;
}

define value_locate (x, nx, n_data) {

variable middle;
variable ilo, ihi;

ihi = n_data;
ilo = 0;

if (nx >=x[ihi]) return ihi;
if (nx <=x[ilo]) return ilo;

forever {
middle = typecast ((ilo + ihi)/2., Integer_Type);
if (middle == ilo) return ilo;
if (nx < x[middle]) ihi = middle; else ilo = middle;
}

}

define interpol (y, x, nx) {

variable last, n_req;
variable i,j,k;
variable dy, dx;
variable ans;

last = length(x)-1;
n_req = length(nx);
ans = Double_Type [n_req];

for (i=0;i j = value_locate(x, nx[i], last);
if (j >= last) j = last-1;
k = j + 1;
dx = 1.0*(x[k]-x[j]);
dy = (y[k]-y[j])/dx;
ans[i] = dy*(nx[i]-x[j]) + y[j];
}

return ans;

}

define mod_quantile(data, frac) {

variable x,y,z,ans;

x=get_energy_axes(data);
y=get_mcounts(data);
z=imcounts(x,y);
ans = interpol(x.hi,z,frac);
return ans;

}

define mod_quantile_raw(data, frac) {

variable x,y,z,ans;

x=get_raw_axes(data);
y=get_data(data);
z=imcounts_raw(x,y);
ans = interpol(x.mid,z,frac);
return ans;

}

define pri_quantile(quan) {

variable i,n_frac,ans;

n_frac = length(quan);
ans = string(quan[0]);

for (i=1;i ans=ans+"\t"+string(quan[i]);
}
% print(ans);

return ans;

}