Check if the object(variable) is defined in R

0 votes

I want to check if some variable is already defined in R without getting an error. How to dot this?

Below is my trial, but I could not succeed in it.

> is.na(qqaaa)
Error: object 'qqaaa' not found
> is.finite(qqaaa)
Error: object 'qqaaa' not found

Thanks!

Apr 17, 2018 in Data Analytics by CodingByHeart77
• 3,710 points
90 views

1 answer to this question.

0 votes

You can use the exists():

> exists("toFindUnknown")
[1] FALSE
> toFindUnknown <- 32
> exists("toFindUnknown")
[1] TRUE
answered Apr 17, 2018 by Sahiti
• 6,290 points

Related Questions In Data Analytics

0 votes
1 answer

How to check if object is defines in R?

You can use the exists function for ...READ MORE

answered Nov 6, 2018 in Data Analytics by Kalgi
• 51,890 points
53 views
0 votes
1 answer

Check if a matrix is diagonalizable in R Programming Language

On a given matrix, a, the first way ...READ MORE

answered Dec 24, 2018 in Data Analytics by Tyrion anex
• 8,380 points
101 views
0 votes
1 answer

How to check if a element is present in the list?

There are multiple functions for this purpose ...READ MORE

answered Oct 28, 2019 in Data Analytics by Cherukuri
• 32,460 points
210 views
0 votes
1 answer
0 votes
1 answer

Big Data transformations with R

Dear Koushik, Hope you are doing great. You can ...READ MORE

answered Dec 17, 2017 in Data Analytics by Sudhir
• 1,610 points
133 views
0 votes
2 answers

Transforming a key/value string into distinct rows in R

We would start off by loading the ...READ MORE

answered Mar 26, 2018 in Data Analytics by Bharani
• 4,560 points
174 views
0 votes
1 answer

Finding frequency of observations in R

You can use the "dplyr" package to ...READ MORE

answered Mar 26, 2018 in Data Analytics by Bharani
• 4,560 points
1,390 views
0 votes
1 answer

Left Join and Right Join using "dplyr"

The below is the code to perform ...READ MORE

answered Mar 26, 2018 in Data Analytics by Bharani
• 4,560 points
221 views
0 votes
1 answer

How to change y axis max in time series using R?

The axis limits are being set using ...READ MORE

answered Apr 3, 2018 in Data Analytics by Sahiti
• 6,290 points
736 views
0 votes
2 answers

How to count unique values in R?

You can try this way, as.data.frame(v) %>% count(v) READ MORE

answered Aug 8, 2019 in Data Analytics by anonymous
3,491 views