Pandas tips
Read data
python
import pandas as pd
yield_file = 'Nomoto2013.dat'
colspecs = [ ]
# A list of tuples giving the extents of the fixed-width fields of each line as half-open intervals (i.e., [from, to[ ).
# For Nomoto et al. (2013), the colspecs is as follows:
# 14, 13, 13, 13, ......, 13, 11+1('\n'),
for i in range(31):
if i == 0:
colspecs.append((0, 14))
else:
colspecs.append((14+13*(i-1), 14+13*i))
df = pd.read_fwf(yield_file, colspecs=colspecs, skiprows=1, nrows=172)There are many methods to read files, such as read_csv, read_table, read_fwf, etc. The read_fwf is used here because the data is in fixed-width format (fwf). For fixed-width format file, the colspecs is needed to be specified. The skiprows is used to skip the header, and nrows is used to specify the number of rows to read. The file Nomoto2013.dat can be downloaded at Yield Table (2013).
Reading a fixed-width format file sometimes can be tricky or not as straightforward as a CSV file, and hence an example is given here.
Add data
The data can be downloade at Solar Abundance Sets in SPEX, which comes from Abundance: standard abundances.
python