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I have a very small number like 1.466013e-65,
I want to round it to 3 decimals left while keeping all the 0s, here is the code I used:
round(1.466013e-65,3)
this will get me 0, but I want it to be 0.000.
How to do it?
If you are fine with character, then you can do it using:-
sprintf("%.3f", round(1.466013e-65, 3))
[1] "0.000"
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how to add parentheses between numbers? I know how to add dashes, are they doing the same way? like 123456789 to (123)456789 in R programming?
sub("(\\d{3})", "(\\1)", 123456789)
[1] "(123)456789"
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I need to iterate a sequence that is being repeated.
Say I have a vector of 1,2,3 I want printed out 5 times.
each time needs to be inceased by one.
so 1,2,3,2,3,4,3,4,5,4,5,6,5,6,7
rep(1:3, 5) + rep(0:4, each=3)
should do the trick
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I am trying to write this (SAS) comand in R. x is a variable with this specific format: j61915035t
x1 = trim(upcase(substr(x,1,1)));
I really appreciate what you are doing in this site!
You want to remove leading/trailing blanks from a character string that is the uppercase first letter of the string x. So this should do it.
library(stringr)
x1 = str_trim(str_to_upper(str_sub(x,1,1)))
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I have a vector c("A","B","C",......) and a list list(c("A"),c("B","C"))
I want to get a vector c(1,2,2....)
Is there any function in some basic packages?
we can use merge
merge(stack(setNames(lst, seq_along(lst))), data.frame(values=v1))$ind
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I want to calculate which value correspond to 80% of a column data in order to use this value as a limit value (Xlimit). After that I want to get column data>Xlimit.
Try this
x = data.frame(a=sample(1:10),b=sample(1:10))
aLim = quantile(x$a,0.8)
xUpdated = x[x$a>=aLim,]