Warnings after running some functions

[maringos]

Hi,
I have found some - probably harmless - warnings after running these functions:
plotGrowthCurve

Warning messages:
1: `fun.y` is deprecated. Use `fun` instead. 
2: `fun.y` is deprecated. Use `fun` instead.

and plotShadowCost

Warning messages:
1: Use of `df$sub` is discouraged. Use `sub` instead. 
2: Use of `df$time` is discouraged. Use `time` instead. 
3: Use of `df$shadow` is discouraged. Use `shadow` instead. 
4: Use of `df$sub` is discouraged. Use `sub` instead. 
5: Use of `df$sub` is discouraged. Use `sub` instead. 
6: Use of `df$sub` is discouraged. Use `sub` instead. 
7: Use of `df$shadow` is discouraged. Use `shadow` instead. 

Thanks for maintaining this software!
GM