[R] Question about Rfast colMins and colMaxs

[Stephen H. Dawson, DSL]

Right, R Studio is not R.

However, the Rfast package is part of R.

https://cran.r-project.org/web/packages/Rfast/index.html

So, rephrasing my question...
What is the best practice to bring a csv file into R so it can be 
accessed by colMaxs and colMins, please?

*Stephen Dawson, DSL*
/Executive Strategy Consultant/
Business & Technology
+1 (865) 804-3454
http://www.shdawson.com <http://www.shdawson.com>


On 11/30/21 3:19 PM, Bert Gunter wrote:
> RStudio is **not** R. In particular, the so-called TidyVerse consists
> of all *non*-standard contributed packages, about which the PG says:
>
> "For questions about functions in standard packages distributed with R
> (see the FAQ Add-on packages in R), ask questions on R-help.
> [The link is:
> https://cran.r-project.org/doc/FAQ/R-FAQ.html#Add-on-packages-in-R
> This gives the list of current _standard_ packages]
>
> If the question relates to a contributed package , e.g., one
> downloaded from CRAN, try contacting the package maintainer first. You
> can also use find("functionname") and
> packageDescription("packagename") to find this information. Only send
> such questions to R-help or R-devel if you get no reply or need
> further assistance. This applies to both requests for help and to bug
> reports."
>
> Note that RStudio maintains its own help resources at:
> https://community.rstudio.com/
> This is where questions about the TidyVerse, ggplot, etc. should be posted.
>
>
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
> On Tue, Nov 30, 2021 at 10:55 AM Stephen H. Dawson, DSL via R-help
> <r-help using r-project.org> wrote:
>> Hi,
>>
>>
>> I am working to understand the Rfast functions of colMins and colMaxs. I
>> worked through the example listed on page 54 of the PDF.
>>
>> https://cran.r-project.org/web/packages/Rfast/index.html
>>
>> https://cran.r-project.org/web/packages/Rfast/Rfast.pdf
>>
>> My data is in a CSV file. So, I bring it into R Studio using:
>> Data <- read.csv("./input/DataSet05.csv", header=T)
>>
>> However, I read the instructions listed on page 54 of the PDF saying I
>> need to bring data into R using a matrix. I think read.csv brings the
>> data in as a dataframe. I think colMins is failing because it is looking
>> for a matrix but finds a dataframe.
>>
>>   > colMaxs(Data)
>> Error in colMaxs(Data) :
>>     Not compatible with requested type: [type=list; target=double].
>>   > colMins(Data, na.rm = TRUE)
>> Error in colMins(Data, na.rm = TRUE) :
>>     unused argument (na.rm = TRUE)
>>   > colMins(Data, value = FALSE, parallel = FALSE)
>> Error in colMins(Data, value = FALSE, parallel = FALSE) :
>>     Not compatible with requested type: [type=list; target=double].
>>
>> QUESTION
>> What is the best practice to bring a csv file into R Studio so it can be
>> accessed by colMaxs and colMins, please?
>>
>>
>> Thanks,
>> --
>> *Stephen Dawson, DSL*
>> /Executive Strategy Consultant/
>> Business & Technology
>> +1 (865) 804-3454
>> http://www.shdawson.com <http://www.shdawson.com>
>>
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