I have a data.frame
that looks like this:
UID<-c(rep(1:25, 2), rep(26:50, 2))
Group<-c(rep(5, 25), rep(20, 25), rep(-18, 25), rep(-80, 25))
Value<-sample(100:5000, 100, replace=TRUE)
df<-data.frame(UID, Group, Value)
But I need the values separated into new rows so I run this:
df<-pivot_wider(df, names_from = Group,
values_from = Value,
values_fill = list(Value = 0))
Which introduces NULL
into the dataset. Sorry, could not figure out a way to get an example dataset with NULL
values. Note: this is now a tbl_df
tbl
data.frame
These aren't great variable names so I run this:
colnames(df)[which(names(df) == "20")] <- "pos20"
colnames(df)[which(names(df) == "5")] <- "pos5"
colnames(df)[which(names(df) == "-18")] <- "neg18"
colnames(df)[which(names(df) == "-80")] <- "neg80"
What I want to be able to do is create a new column (variable) that rowSums
across columns. So I run this:
df<-df%>%
replace(is.na(.), 0) %>%
mutate(rowTot = rowSums(.[2:5]))
Which of course works on the example dataset but not on the one with NULL
values. I have tried converting NULL
to NA
using df[df== "NULL"] <- NA
but the values do not change. I have tried converting the lists to numeric using as.numeric(as.character(unlist(df[[2]])))
but I get an error telling me I have unequal number of rows, which I guess would be expected.
I realize there might be a better process to get my desired end result, so any suggestions to any of this is most appreciated.
EDIT: Here is a link to the actual dataset which will introduce Null
values after using pivot_wider
. https://drive.google.com/file/d/1YGh-Vjmpmpo8_sFAtGedxzfCiTpYnKZ3/view?usp=sharing
Difficult to answer with confidence without an actual reproducible example where the error occurs but I am going to take a guess.
I think your pivot_wider
steps produces list columns (meaning some values are vectors) and that is why you are getting NULL
values. Create a unique row for each Group
and then use pivot_wider
. Also rowSums
has na.rm
parameter so you don't need replace
.
library(dplyr)
df %>%
group_by(temp) %>%
mutate(row = row_number()) %>%
pivot_wider(names_from = temp, values_from = numseeds) %>%
mutate(rowTot = rowSums(.[3:6], na.rm = TRUE))
Please change the column numbers according to your data in rowSums
if needed.
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