CODEWITHSUNDEEP
rif-statementdataframe
user3021648
user3021648

Reputation: 67

Nested If Else Statement - Argument "Yes" Missing with No Default

Basically I have a column with signal strength values (Sig_1) and am making a new column called "Activity2". If the difference between one value and the next (of Sig_1) is equal to or more than 5, I would like an "A" to appear in my new column. If the signal strength is below -130, I would like a "W" to appear and if it is above -130 then I would like an "I".

I have a nested ifelse statement:

df <- transform(df, Activity2 = c(0, ifelse(diff(Sig_1)<5), 
ifelse(Sig_1<-130), "W", "I"), "A")

I can't see what's wrong with it but I keep getting:

"Error in ifelse(diff(Sig_1) < 5) :
argument "yes" is missing, with no default"

Upvotes: 0

Views: 11884

Answers (1)

shadow
shadow

Reputation: 22333

The error is due to wrong brackets: You basically have ifelse(TRUE). Also be careful with the difference between a <- 1 and a < -1. Here's some code that should do what you want:

df <- transform(df, Activity2 = 
ifelse(c(0, diff(Sig_1))<5, ifelse(Sig_1 < -130, "W", "I"), "A"))

Upvotes: 4

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