# Minimum(df\[:value\]) and maximum(df\[:value\]) not in the documentation
**URL:** https://discourse.julialang.org/t/minimum-df-value-and-maximum-df-value-not-in-the-documentation/2155
**Category:** Data
**Tags:** documentation
**Created:** [February 17, 2017, 3:18pm UTC](https://discourse.julialang.org/t/minimum-df-value-and-maximum-df-value-not-in-the-documentation/2155 "2017-02-17T15:18:02Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)
#### Post date: [February 17, 2017, 3:18pm UTC](https://discourse.julialang.org/t/minimum-df-value-and-maximum-df-value-not-in-the-documentation/2155/1 "2017-02-17T15:18:02Z")
Hello,
I just noticed that both minimum(df[:value]) and maximum(df[:value]) to retrive the minimum/maximum values of a column in a dataframe are not in the documentation… as they are not the standard min() max() function, it is not straightforward to find them… I think they should be added to the documentation of DataFrame…
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### Author:  [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)
#### Post date: [February 17, 2017, 3:23pm UTC](https://discourse.julialang.org/t/minimum-df-value-and-maximum-df-value-not-in-the-documentation/2155/2 "2017-02-17T15:23:39Z")
`maximum` and `minimum` are standard functions for collections defined in Base.