Re: How to make {f,g}[a,b,c] to become {{f[a],g[a]},{f[b],g[b]},{f[c],g[c]}}
- To: mathgroup at smc.vnet.net
- Subject: [mg105339] Re: How to make {f,g}[a,b,c] to become {{f[a],g[a]},{f[b],g[b]},{f[c],g[c]}}
- From: Albert Retey <awnl at gmx-topmail.de>
- Date: Sat, 28 Nov 2009 01:08:28 -0500 (EST)
- References: <heoe15$4ph$1@smc.vnet.net>
Lawrence Teo schrieb:
> I have a question. How to make {f,g}[a,b,c] to become {{f[a],g[a]},{f
> [b],g[b]},{f[c],g[c]}}?
>
> I want to do {GPD, Population} for all countries.
>
> Something similar to the following...
> {CountryData[#, "GDP"] &, CountryData[#, "Population"] &} /@
> CountryData[]
>
> It ends up in the form of {f,g}[a,b,c,d,...].
I doubt that, it rather looks like {{f,g}[a],{f,g}[b],...} to me...
> I need a way to
> 'distribute' the country name into the GDP and Population portion.
>
Why don't you just do:
{CountryData[#, "GDP"], CountryData[#, "Population"]} & /@
CountryData[]
in the first place?
hth,
albert