adds py-script which was un-commited

wsgi-scripts/idl_to_py_lib.py

+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Dec 17 14:32:22 2021
+
+@author: smordini
+
+useful functions for sed fitting
+"""
+import numpy as np
+from scipy import interpolate
+import math
+
+
+def match(list_a,list_b):
+    matched_valuse=list(set(list_a) & set(list_b))
+    pos_a=[list_a.index(val) for val in matched_valuse]
+    pos_b=[list_b.index(val) for val in matched_valuse]
+    return(pos_a,pos_b)
+
+def tostring(in_str):
+    
+    if type(in_str)!=str:
+        in_str=str(in_str)
+    
+    out_str=in_str.strip()
+    return out_str
+
+
+def pad0_num(num):
+    
+    
+    if type(num)==str:
+        try:
+            float(num)
+        except:
+            print('The string must be a number. Retry')
+    if type(num)!=str:
+        num=str(num)
+        
+    q=num.find('.')
+    if q<=len(num)-2 and q!=-1:
+        num0=num+'0'
+    else:
+        num0=num
+
+
+    return(num0)
+
+def remove_char(in_str,ch):
+        
+    if type(in_str)!=str:
+        in_str=str(in_str)
+    q=in_str.find(ch)
+    if q==-1:
+        out_str=in_str
+    else:
+        out_str=in_str.replace(ch, '')
+    return out_str
+
+def planck(wavelength, temp):
+    
+    try:
+        len(wavelength)
+    except:
+        wavelength=[wavelength]
+    try:
+        len(temp)
+    except:
+        pass
+    else:
+        print('Only one temperature allowed, not list')
+        return
+    if len(wavelength)<1:
+        print('Enter at least one wavelength in Angstrom.')
+        return
+
+    
+    wave=[ wl*1e-8 for wl in wavelength]
+    c1 =  3.7417749e-5 #2*pi*h*c*c with constatns in cgs units (TO BE CHECKED?)
+    c2 =  1.4387687    # h*c/k
+    value = [c2/wl/temp for wl in wave]
+    # print(value)
+    bbflux=[]
+    test_precision=math.log(np.finfo(float).max)
+    # print(test_precision)
+    for val,wl in zip (value, wave):   
+        if val<test_precision:
+            flux=c1/(wl**5*(math.expm1(val)))
+            # print(flux)
+            bbflux.append(flux*1e-8)
+        else:
+            bbflux.append(0)
+    if len(bbflux)==1:
+        bbflux=bbflux[0]
+    
+    
+    
+    return bbflux
+
+
+def lbol(wavelength,flux,dist):
+#function lbol,w,f,d
+
+# interpolation between data points is done in logarithmic space to allow 
+# straight lines (the SED is like that) in the log-log plot. interpolation 
+# on a finer grid is done and then data are transformed back in linear space
+# where the trapezoidal interpolation is then done
+
+# w is lambda in um
+# f is flux jy
+# d is dist in parsec
+
+#convert flux to W/cm2/um
+
+    fw=[1.e-15*f*.2997/(w**2.) for f,w in zip(flux,wavelength)]
+    lw=[np.log10(w) for w in wavelength]
+    lfw=[np.log10(f) for f in fw]
+    #1000 points resampling
+    
+    lw1=(np.arange(1000)*((max(lw)-min(lw))/1000.))+min(lw)
+    interpfunc = interpolate.interp1d(lw,lfw, kind='linear')
+    lfw1=interpfunc(lw1)
+    w1=[10**l for l in lw1]
+    fw1=[10**l for l in lfw1]
+    jy=[f/1.e-15/.3*(w**2.) for f,w in zip (fw1,w1)]
+#    ;integrate over whole range
+    fint=0.
+    # for i=0,n_elements(w1)-2 do fint=fint+((fw1(i)+fw1(i+1))*(w1(i+1)-w1(i))/2.):
+    for i in range(len(w1)-2):
+        fint=fint+((fw1[i]+fw1[(i+1)])*(w1[(i+1)]-w1[(i)])/2.)
+    
+#    ;fint=int_tabulated(w,fw,/double,/sort)
+    # ; integrate longword of 350um
+    # ;qc0=where(w ge 350.)
+    # ;fc0=int_tabulated(w(qc0),fw(qc0))
+    # ; compute lbol
+    # l=fint*4.*math.pi*d*3.e18/3.8e26*d*3.e18   ;lsol
+    lum=fint*4*np.pi*dist*3.086e18/3.827e26*dist*3.086e18   #lsol
+    # ;c0ratio=fc0/fint
+    # ;print,'Lsubmm/Lbol = ',c0ratio
+    
+    return lum
+
+def wheretomulti(array, indices):
+    s=array.shape
+    # print(s)
+    NCol=s[1]
+    Col=indices % NCol
+    
+    if len(s)==2:
+        Row=indices/NCol
+        return (Col, Row)
+    elif len(s)==3:
+        NRow  = s[2]
+        Row   = ( indices / NCol ) % NRow
+        Frame = indices / ( NRow * NCol )
+        return(Col, Row, Frame)
+    else:
+        Col=0
+        Row=0
+        Frame=0
+        print('WhereToMulti called with bad input. Array not a vector or matrix.')
+        return(Col, Row, Frame)
+    return