[R] Chart will not display

phii m@iii@g oii phiiipsmith@c@
Wed, 03 Jun 2020 02:21:18 -0000

Thanks Bert. That did it.

Philip

On 2020-06-02 22:02, Bert Gunter wrote:
> In a function you must explicitly print/plot the ggplot() object, I
> assume. i.e. plot(ggplot(...)) etc.
>
> I do not use ggplot, so if I'm wrong, sorry.  But try it.  Hopefully
> someone else will get it right if it doesn't do it.
>
> 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, Jun 2, 2020 at 6:46 PM <phil at philipsmith.ca> wrote:
>
>> I have made what must be a simple mistake, but I have not been able
>> to
>> find it.
>>
>> I create a function to plot a chart for a single variable. I want to
>>
>> display separate charts for several variables, one after another,
>> with
>> "Press [enter] to continue" in between. The function works
fine for
>> a
>> single variable, but when I try to display several variables
>> consecutively, using a for statement, no charts are displayed. The
>> for
>> statement executes without apparent error, but no charts appear.
>>
>> Here is a reprex.
>>
>> library(tidyverse)
>> t <- c(1,2,3,4,5)
>> a <- c(1,4,5,8,7)
>> b <- c(2,2,5,3,1)
>> c <- c(3,6,2,8,3)
>> df <- data.frame(t=t,a=a,b=b,c=c)
>> df1 <-
pivot_longer(df,cols=c(a,b,c),names_to="var",values_to="val")
>> chfn <- function(chnm) {
>> ggplot(filter(df1,var==chnm),aes(x=t,y=val,group=1)) +
>> geom_line() +
>> labs(title=chnm)
>> }
>> chfn("b") # test of the function - it works
>> chnms <- c("a","b","c")
>> for (i in chnms) {
>> chfn(i)
>> readline(prompt="Press [enter] to continue")
>> }
>>
>> Thanks for your help.
>>
>> Philip
>>
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