Hi,
I have a DataFrame "df" and I would like to create a new DataFrame "m" with
the same colnames than df.
And then, append to "m" the rows of "df" matching a complex set of
conditions, so I need to test many conditions for each row.
The problem I have is to create an empty dataframe "m" with the sames
colnames of "df" and then to append the rows matching conditions to it.
df = readtable("file.tsv")
# trying to create an empty copy of df
m = DataFrame()
names!(m, names(df)) # produce error ArgumentError: Length of nms doesn't
match length of x
# but I did not manage to create m with the same cols number than df.
z = size(df)[1]
# for each row of df append the rows matching many conditions on many
columns
for i = 1:z
if condition(df[:colname_x][i])
push!(m,i)
end
end
Thank you for your comments !
