Type of sample code

[Edward Z. Yang]

On the wiki, some suggested sample code is as such:

$ ghci -package Chart
...
Prelude> :m Graphics.Rendering.Chart.Simple
Prelude Graphics.Rendering.Chart.Simple> plotWindow [0,0.1..2.9] sin

However, I needed to explicitly cast the list into [Double], lest
I get an ambiguous type variable. Am I or the example wrong?

Cheers,
Edward

[Tim Docker]

This works as written for me with chart-0.13 on GHC 10.4. What
versions are you using?

[Edward Z. Yang]

Excerpts from Tim Docker's message of Mon Apr 12 20:48:09 -0400 2010:

> This works as written for me with chart-0.13 on GHC 10.4. What
> versions are you using?

Hmm, it looks like it works if I do this in GHCI, but not if I stick it
in an HS file.

Cheers,
Edward

[Malcolm Wallace]

> Hmm, it looks like it works if I do this in GHCI, but not if I stick
> it
> in an HS file.

You get automatic type-defaulting of ambiguous type variables in the
interactive environment, but not when you compile.

Regards,
Malcolm